perf(dsp): optimize equalizer and update coefficients calculation

- Enable edge-to-edge display in `MainActivity` and handle window insets in `PlayerFragment`.
- Add a fade-out animation when hiding the loading overlay.
- Sync player state with the controller during setup and reset playing state in preferences on service destruction.
- Simplify splash screen drawable and update background color attributes in layout.
- Remove manual navigation bar color overrides.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,38 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+ - Device: [e.g. iPhone6]
+ - OS: [e.g. iOS8.1]
+ - Browser [e.g. stock browser, safari]
+ - Version [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/gradle-publish.yml

@@ -1,14 +1,18 @@
 # yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 name: Build and publish APK
 on:
+  workflow_dispatch:
   push:
-    tags:
+    branches: [ "main" ]
-      - '*'
+  pull_request:
+    branches: [ "main" ]
+    
 
 env:
   ANDROID_HOME: /usr/local/lib/android/sdk/
-  APK_PATH: app/build/outputs/apk/release/Radio-release-unsigned.apk
+  APK_PATH: app/build/outputs/apk/release/Radio.apk
   APKSIGNER: /usr/local/lib/android/sdk/build-tools/34.0.0/apksigner
+  ZIPALIGN: /usr/local/lib/android/sdk/build-tools/34.0.0/zipalign
 
 jobs:
   build:
@@ -17,10 +21,10 @@ jobs:
       contents: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - name: Setup JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           java-version: 17
           distribution: adopt
@@ -28,7 +32,7 @@ jobs:
 
       - name: Cache Android SDK
         #id: cache-android-sdk
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ${{ env.ANDROID_HOME }}
           key: ${{ runner.os }}-android-sdk
@@ -37,9 +41,9 @@ jobs:
         ## It is not necessary to check for cache hit as it
         ## will not download Android SDK again
         #if: steps.cache-android-sdk.outputs.cache-hit != 'true'
-        uses: android-actions/setup-android@v3
+        uses: android-actions/setup-android@v4
         with:
-          packages: ''
+          packages: 'ndk;29.0.14206865'
 
       - name: Grant execute permission for gradlew
         run: chmod +x ./gradlew
@@ -50,6 +54,10 @@ jobs:
       - name: Check APK path
         run: ls -R app/build/outputs/apk
 
+      - name: Zipalign APK
+        run: |
+          ${{ env.ZIPALIGN }} -v -p 4 ${{ env.APK_PATH }} app-release-aligned.apk
+
       - name: Sign APK
         env:
           SIGN_CERT: ${{ secrets.SIGN_CERT }}
@@ -57,35 +65,12 @@ jobs:
         run: |
           echo "$SIGN_CERT" | base64 -d > cert.der
           echo "$SIGN_KEY" | base64 -d > key.der
-          mv ${{ env.APK_PATH }} app-release.apk
+          ${{ env.APKSIGNER }} sign --key key.der --cert cert.der app-release-aligned.apk
-          ${{ env.APKSIGNER }} sign --key key.der --cert cert.der app-release.apk
           rm cert.der key.der
-          
-      - name: Zipalign APK
-        run: |
-          /usr/local/lib/android/sdk/build-tools/34.0.0/zipalign -v -p 4 app-release.apk app-release-aligned.apk
           mv app-release-aligned.apk app-release.apk
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: app-release
           path: app-release.apk
-
-  publish:
-    runs-on: ubuntu-latest
-    needs: build
-    permissions:
-      contents: write
-    steps:
-      - name: Download artifact
-        uses: actions/download-artifact@v4
-        with:
-          name: app-release
-          path: app-release.apk
-
-      - name: Create release
-        uses: ncipollo/release-action@v1
-        with:
-          artifacts: "app-release.apk"
-          draft: true

.gitignore

@@ -5,3 +5,6 @@
 /.idea
 /build
 /captures
+/gradle/gradle-daemon-jvm.properties
+/.kotlin
+/app/.cxx/

.vscode/c_cpp_properties.json

@@ -0,0 +1,16 @@
+{
+    "configurations": [
+        {
+            "name": "Android",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ]
+        }
+    ],
+    "version": 4
+}

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "C_Cpp.default.compilerPath": ""
+}

LICENSE.md

@@ -1,23 +1,678 @@
-The MIT License (MIT)
+GNU GENERAL PUBLIC LICENSE
+Version 3, 29 June 2007
 =====================
 
-Copyright (c) 2025 - Michatec
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+
 --------------------------------
 
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+Preamble
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-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in
+  The GNU General Public License is a free, copyleft license for
-all copies or substantial portions of the Software.
+software and other kinds of works.
 
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+  The licenses for most software and other practical works are designed
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+share and change all versions of a program--to make sure it remains free
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+  9. Acceptance Not Required for Having Copies.
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+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
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+  10. Automatic Licensing of Downstream Recipients.
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+  11. Patents.
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+available, or (2) arrange to deprive yourself of the benefit of the
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+receiving the covered work authorizing them to use, propagate, modify
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+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
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+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
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+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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+  16. Limitation of Liability.
+
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+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
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+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1,19 +1,39 @@
+<p align="center">
+	<a href="https://github.com/michatec/Radio/releases"><img src="https://img.shields.io/github/v/release/michatec/Radio?style=flat-square&include_prereleases&label=version" /></a>
+	<a href="https://github.com/michatec/Radio/releases"><img src="https://img.shields.io/github/downloads/michatec/Radio/total.svg?style=flat-square" /></a>
+	<a href="https://github.com/michatec/Radio/issues"><img src="https://img.shields.io/github/issues-raw/michatec/Radio.svg?style=flat-square&label=issues" /></a>
+	<a href="https://github.com/michatec/Radio/graphs/contributors"><img src="https://img.shields.io/github/contributors/michatec/Radio?style=flat-square" /></a>
+</p>
 <div align="center">
 
 ### ℹ️ About Radio
 **Radio is an application with a minimalist approach to listening to radio over the Internet.** <br>
 **Radio only offers a very basic search option, and it imports audio streaming links when you tap them in a web browser.** <br>
+**Radio now also supports Android TV (Beta) and Cast to Devices (Beta).** <br>
 **Pull request are welcome at any time.**<br>
 
-**Radio is free software. It is released under the [MIT open source license](https://opensource.org/licenses/MIT).**
+**Radio is free software. It is released under the [GPLv3 open source license](https://opensource.org/licenses/GPL-3.0).**
 </div>
 
 ----------------------------------------
 
+<details>
+<summary>❗Warning</summary>
+<br>
+<p>
+Google has announced that, starting in 2026/2027, all apps on certified Android devices will require the developer to submit personal identity details directly to Google.
+
+Since the developers of this app do not agree to this requirement, this app will no longer work on certified Android devices after that time.
+</p>
+<a href="https://github.com/woheller69/FreeDroidWarn">ℹ️ More Information</a>
+</details>
+
+----------------------------------------
+
 <details>
 <summary>⚙️ Install Radio</summary>
 <br>
-<a href="https://github.com/michatec/Radio/releases/latest"><img src="https://user-images.githubusercontent.com/15986930/229208526-e5a63be5-0d0b-48ab-a222-9f2f2faf0ee4.png" height="80px"></a>
+<a href="https://github.com/michatec/Radio/releases/latest"><img src="https://user-images.githubusercontent.com/15986930/229208526-e5a63be5-0d0b-48ab-a222-9f2f2faf0ee4.png" alt="Preview" height="80px"></a>
 </details>
 
 ----------------------------------------
@@ -57,10 +77,32 @@ You can help out the radio-browser.info community by [adding the missing station
 
 ----------------------------------------
 
+<details>
+<summary>📺 Android TV Controls</summary>
+<br>
+
+When **Edit Stations** is enabled:
+- Press **← (Left)** on the remote to open the detailed station editing area
+- Press **3** or **Back** to close the editing area
+
+**General TV** Controls:
+- Press **0** or **DEL** to remove the selected radio station
+- Press **1** or **SPACE** to make the selected radio station favourite
+- Press **2** or **PLUS** to reorder the selected radio station
+
+</details>
+
+----------------------------------------
+
 <details>
 <summary>📜️ Credit</summary>
 
-Base app Michatec & [TRANSISTOR](https://codeberg.org/y20k/transistor).
+- [Radio Browser](http://www.radio-browser.info/) for providing the radio station database
+- [AndroidX Leanback](https://developer.android.com/jetpack/androidx/releases/leanback) for providing the Android TV UI components
+
+- Michatec for developing the app and maintaining the project
+- All the contributors who have contributed to the project by submitting pull requests, reporting issues, or providing feedback
+
 </details>
 
 <div align="right">

app/build.gradle

@@ -1,19 +1,32 @@
-apply plugin: 'com.android.application'
+plugins {
-apply plugin: 'kotlin-android'
+    alias libs.plugins.android.application
-apply plugin: 'kotlin-parcelize'
+    id 'kotlin-parcelize'
+}
+
+androidComponents {
+    onVariants(selector().all()) { variant ->
+        variant.outputs.forEach { output ->
+            output.outputFileName.set("Radio.apk")
+        }
+    }
+}
 
 android {
     namespace 'com.michatec.radio'
-    compileSdk 35
+    compileSdk 36
 
     defaultConfig {
         applicationId 'com.michatec.radio'
         minSdk 28
-        targetSdk 35
+        targetSdk 36
-        versionCode 129
+        versionCode 145
-        versionName '12.9'
+        versionName '14.5'
         resourceConfigurations += ['en', 'de', 'el', 'nl', 'pl', 'ru','uk', 'ja', 'da', 'fr']
-        setProperty('archivesBaseName', 'Radio')
+        externalNativeBuild {
+            cmake {
+                cppFlags ''
+            }
+        }
     }
 
     compileOptions {
@@ -41,28 +54,42 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+    ndkVersion "29.0.14206865"
+    externalNativeBuild {
+        cmake {
+            path file('src/main/cpp/CMakeLists.txt')
+            version '3.22.1'
+        }
+    }
 }
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
 
     // Google Stuff //
-    implementation 'com.google.android.material:material:1.12.0'
+    implementation libs.material
-    implementation 'com.google.code.gson:gson:2.10.1'
+    implementation libs.gson
+    implementation libs.play.services.cast.framework
 
     // AndroidX Stuff //
-    implementation 'androidx.activity:activity-ktx:1.10.1'
+    implementation libs.core.ktx
-    implementation 'androidx.palette:palette-ktx:1.0.0'
+    implementation libs.activity.ktx
-    implementation 'androidx.preference:preference-ktx:1.2.1'
+    implementation libs.palette.ktx
-    implementation 'androidx.media:media:1.7.0'
+    implementation libs.preference.ktx
-    implementation 'androidx.media3:media3-exoplayer:1.7.1'
+    implementation libs.media
-    implementation 'androidx.media3:media3-exoplayer-hls:1.7.1'
+    implementation libs.media3.exoplayer
-    implementation 'androidx.media3:media3-session:1.7.1'
+    implementation libs.media3.exoplayer.hls
-    implementation 'androidx.media3:media3-datasource-okhttp:1.7.1'
+    implementation libs.media3.session
-    implementation 'androidx.navigation:navigation-fragment-ktx:2.9.0'
+    implementation libs.media3.cast
-    implementation 'androidx.navigation:navigation-ui-ktx:2.9.0'
+    implementation libs.media3.datasource.okhttp
-    implementation 'androidx.work:work-runtime-ktx:2.10.1'
+    implementation libs.navigation.fragment.ktx
+    implementation libs.navigation.ui.ktx
+    implementation libs.work.runtime.ktx
+    implementation libs.leanback
+
+    implementation libs.freedroidwarn
 	
     // Volley HTTP request //
-    implementation 'com.android.volley:volley:1.2.1'
+    implementation libs.volley
+    implementation libs.material3
 }

app/src/main/AndroidManifest.xml

@@ -1,6 +1,13 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-feature
+        android:name="android.software.leanback"
+        android:required="false" />
+    <uses-feature
+        android:name="android.hardware.touchscreen"
+        android:required="false" />
+
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK" />
@@ -10,6 +17,7 @@
     <application
         android:name=".Radio"
         android:allowBackup="true"
+        android:banner="@mipmap/ic_launcher"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
         android:icon="@mipmap/ic_launcher"
@@ -21,10 +29,9 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
         android:usesCleartextTraffic="true"
-        tools:targetApi="tiramisu">
+        tools:targetApi="33">
 
         <!-- ANDROID AUTO SUPPORT -->
-        <!--  https://developer.android.com/training/auto/audio/ -->
         <meta-data
             android:name="com.google.android.gms.car.application"
             android:resource="@xml/automotive_app_desc" />
@@ -32,56 +39,60 @@
             android:name="com.google.android.gms.car.notification.SmallIcon"
             android:resource="@mipmap/ic_launcher" />
 
-        <!-- Main activity for radio station playback on phone -->
+        <!-- GOOGLE CAST SUPPORT -->
+        <receiver android:name="androidx.mediarouter.media.MediaTransferReceiver" />
+        <meta-data
+            android:name="com.google.android.gms.cast.framework.OPTIONS_PROVIDER_CLASS_NAME"
+            android:value="com.michatec.radio.CastOptionsProvider" />
+
+        <activity
+            android:name=".ExpandedControllerActivity"
+            android:exported="false"
+            android:launchMode="singleTask" />
+
+        <!-- Main activity for radio station playback on phone and TV -->
         <activity
             android:name=".MainActivity"
             android:configChanges="orientation|screenSize"
             android:windowSoftInputMode="adjustPan"
+            android:theme="@style/SplashTheme"
             android:exported="true">
 
-            <!-- react to main intents -->
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
             </intent-filter>
 
-            <!-- react to be recognized as a music player -->
             <intent-filter>
                 <action android:name="android.intent.action.MUSIC_PLAYER" />
                 <category android:name="android.intent.category.CATEGORY_APP_MUSIC" />
             </intent-filter>
 
-            <!-- react to voice searches, like "Play Security Now" -->
             <intent-filter>
                 <action android:name="android.media.action.MEDIA_PLAY_FROM_SEARCH" />
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
 
-            <!-- react to playlist-links based on file extension -->
+            <intent-filter android:autoVerify="true">
-            <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
-
                 <category android:name="android.intent.category.BROWSABLE" />
                 <category android:name="android.intent.category.DEFAULT" />
-
                 <data android:scheme="http" />
                 <data android:scheme="https" />
-                <data android:host="*" />
+                <data android:host="*" tools:ignore="AppLinkUrlError" />
                 <data android:pathPattern=".*\\.m3u" />
                 <data android:pathPattern=".*\\.m3u8" />
                 <data android:pathPattern=".*\\.pls" />
             </intent-filter>
 
-            <!-- react to playlist-links based on mimetype -->
+            <intent-filter android:autoVerify="false">
-            <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
-
                 <category android:name="android.intent.category.BROWSABLE" />
                 <category android:name="android.intent.category.DEFAULT" />
-
                 <data android:scheme="http" />
                 <data android:scheme="https" />
-                <data android:host="*" />
+                <data android:host="*" tools:ignore="AppLinkUrlError" />
                 <data android:mimeType="audio/x-scpls" />
                 <data android:mimeType="audio/mpegurl" />
                 <data android:mimeType="audio/x-mpegurl" />
@@ -92,11 +103,9 @@
                 <data android:mimeType="application/octet-stream" />
             </intent-filter>
 
-            <!-- react to hls playlist-links based on mimetype -->
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
                 <category android:name="android.intent.category.DEFAULT" />
-
                 <data android:scheme="content" />
                 <data android:host="*" />
                 <data android:mimeType="audio/x-scpls" />
@@ -108,20 +117,16 @@
                 <data android:mimeType="application/vnd.apple.mpegurl.audio" />
             </intent-filter>
 
-            <!-- react to "start player service" intents -->
             <intent-filter>
                 <action android:name="com.michatec.radio.action.START_PLAYER_SERVICE" />
             </intent-filter>
 
-            <!-- App Shortcuts -->
             <meta-data
                 android:name="android.app.shortcuts"
                 android:resource="@xml/shortcuts" />
 
         </activity>
 
-
-        <!-- Player Service -->
         <service
             android:name=".PlayerService"
             android:enabled="true"
@@ -135,8 +140,6 @@
             </intent-filter>
         </service>
 
-
-        <!-- handles completed downloads -->
         <receiver
             android:name=".helpers.DownloadFinishedReceiver"
             android:exported="true">
@@ -145,8 +148,6 @@
             </intent-filter>
         </receiver>
 
-
-        <!-- handles media buttons -->
         <receiver
             android:name="androidx.media.session.MediaButtonReceiver"
             android:exported="true">
@@ -155,8 +156,6 @@
             </intent-filter>
         </receiver>
 
-
-        <!-- file provider -->
         <provider
             android:name="androidx.core.content.FileProvider"
             android:authorities="${applicationId}.provider"

app/src/main/cpp/CMakeLists.txt

@@ -0,0 +1,42 @@
+
+# For more information about using CMake with Android Studio, read the
+# documentation: https://d.android.com/studio/projects/add-native-code.html.
+# For more examples on how to use CMake, see https://github.com/android/ndk-samples.
+
+# Sets the minimum CMake version required for this project.
+cmake_minimum_required(VERSION 3.22.1)
+
+# Declares the project name. The project name can be accessed via ${ PROJECT_NAME},
+# Since this is the top level CMakeLists.txt, the project name is also accessible
+# with ${CMAKE_PROJECT_NAME} (both CMake variables are in-sync within the top level
+# build script scope).
+project("radio")
+
+# Creates and names a library, sets it as either STATIC
+# or SHARED, and provides the relative paths to its source code.
+# You can define multiple libraries, and CMake builds them for you.
+# Gradle automatically packages shared libraries with your APK.
+#
+# In this top level CMakeLists.txt, ${CMAKE_PROJECT_NAME} is used to define
+# the target library name; in the sub-module's CMakeLists.txt, the project name
+# is preferred for the same purpose.
+#
+# In order to load a library into your app from Java/Kotlin, you must call
+# System.loadLibrary() and pass the name of the library defined here;
+# for GameActivity/NativeActivity derived applications, the same library name must be
+# used in the AndroidManifest.xml file.
+add_library(dsp SHARED
+    dsp.cpp)
+
+add_library(extra SHARED
+    extra.cpp)
+
+# Specifies libraries CMake should link to your target library. You
+# can link libraries from various origins, such as libraries defined in this
+# build script, prebuilt third-party libraries, or Android system libraries.
+target_link_libraries(dsp
+    android
+    log)
+target_link_libraries(extra
+    android
+    log)

app/src/main/cpp/dsp.cpp

@@ -0,0 +1,458 @@
+#include <jni.h>
+#include <vector>
+#include <cmath>
+#include <complex>
+#include <array>
+#include <atomic>
+
+#if defined(__ARM_NEON)
+#include <arm_neon.h>
+#endif
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+static std::atomic<float> gSampleRate(44100.0f);
+static constexpr int FFT_SIZE = 2048;
+static constexpr int NUM_EQ_BANDS = 10;
+static constexpr float INV_32768 = 1.0f / 32768.0f;
+static constexpr float SQRT_2_INV = 0.70710678f;
+static constexpr float DENORMAL_OFFSET = 1e-18f;
+static constexpr float INTERPOLATION_SPEED = 0.5f;
+
+static constexpr std::array<float, NUM_EQ_BANDS> EQ_FREQUENCIES = {
+        31.25f, 62.5f, 125.0f, 250.0f, 500.0f,
+        1000.0f, 2000.0f, 4000.0f, 8000.0f, 16000.0f
+};
+
+struct alignas(16) EqBandInterpolator {
+    std::atomic<float> targetGain{0.0f};
+    std::atomic<float> currentGain{0.0f};
+    float a0 = 1.0f, a1 = 0.0f, a2 = 0.0f, b1 = 0.0f, b2 = 0.0f;
+    float z1 = 0.0f, z2 = 0.0f;
+    bool active = false;
+
+    inline void setTargetGain(float g) { targetGain.store(g, std::memory_order_release); }
+    
+    inline void updateInterpolation() {
+        float target = targetGain.load(std::memory_order_acquire);
+        float current = currentGain.load(std::memory_order_relaxed);
+        float diff = target - current;
+        if (std::abs(diff) > 0.001f) {
+            currentGain.store(current + diff * INTERPOLATION_SPEED, std::memory_order_release);
+        }
+    }
+    
+    inline float process(float x) {
+        if (!active) return x;
+        updateInterpolation();
+        float y = x * a0 + z1;
+        z1 = x * a1 + z2 - b1 * y + DENORMAL_OFFSET;
+        z2 = x * a2 - b2 * y;
+        return y;
+    }
+    
+    inline void setCoefficients(float sr, float f, float g, float bw) {
+        active = true;
+        const float A = powf(10.0f, g / 60.0f);
+        const float w = 2.0f * static_cast<float>(M_PI) * f / sr;
+        const float alpha = sinf(w) * sinhf(logf(2.0f) / 2.0f * bw * w / sinf(w));
+        const float c = cosf(w);
+        const float a0_raw = 1.0f + alpha / A;
+        const float invA0 = 1.0f / a0_raw;
+        a0 = (1.0f + alpha * A) * invA0;
+        a1 = (-2.0f * c) * invA0;
+        a2 = (1.0f - alpha * A) * invA0;
+        b1 = (-2.0f * c) * invA0;
+        b2 = (1.0f - alpha / A) * invA0;
+    }
+};
+
+struct alignas(16) BassFilter {
+    alignas(16) float a0 = 1.2f, a1 = 1.2f, a2 = 1.2f, b1 = 0.0f, b2 = 0.0f;
+    alignas(16) float z1 = 0.0f, z2 = 0.0f;
+    std::atomic<bool> active{false};
+    std::atomic<float> targetGain{0.0f};
+    std::atomic<float> currentGain{0.0f};
+
+    inline void updateInterpolation() {
+        float target = targetGain.load(std::memory_order_acquire);
+        float current = currentGain.load(std::memory_order_relaxed);
+        float diff = target - current;
+        if (std::abs(diff) > 0.001f) {
+            currentGain.store(current + diff * INTERPOLATION_SPEED, std::memory_order_release);
+        }
+    }
+
+    inline float process(float x) {
+        if (!active.load(std::memory_order_acquire)) return x;
+        updateInterpolation();
+        float y = x * a0 + z1;
+        z1 = x * a1 + z2 - b1 * y + DENORMAL_OFFSET;
+        z2 = x * a2 - b2 * y;
+        if(y > 1.2f) y = 1.2f; else if(y < -1.2f) y = -1.2f;
+        return y;
+    }
+
+    void setCoefficients(float sr, float f, float g, float q){
+        float A=powf(10.0f,g/60.0f);
+        float w=2.0f*static_cast<float>(M_PI)*f/sr;
+        float alpha=sinf(w)/2.0f*sqrtf((A+1.0f/A)*(1.0f/q-1.0f)+2.0f);
+        float c=cosf(w),sqrtA=sqrtf(A);
+        float a0_raw=(A+1.0f)+(A-1.0f)*c+2.0f*sqrtA*alpha;
+        float invA0=1.0f/a0_raw;
+        a0=A*((A+1.0f)-(A-1.0f)*c+2.0f*sqrtA*alpha)*invA0;
+        a1=2.0f*A*((A-1.0f)-(A+1.0f)*c)*invA0;
+        a2=A*((A+1.0f)-(A-1.0f)*c-2.0f*sqrtA*alpha)*invA0;
+        b1=-2.0f*((A-1.0f)+(A+1.0f)*c)*invA0;
+        b2=((A+1.0f)+(A-1.0f)*c-2.0f*sqrtA*alpha)*invA0;
+    }
+    
+    void applyGain(float sr) {
+        float g = currentGain.load(std::memory_order_acquire);
+        setCoefficients(sr, 150.0f, g, SQRT_2_INV);
+    }
+};
+
+class ReverbOptimized {
+    struct DelayLine {
+        float buffer[48000]{};
+        int size = 48000;
+        int pos = 0;
+
+        inline float read(float delaySamples) {
+            float readPos = static_cast<float>(pos) - delaySamples;
+            if (readPos < 0.0f) readPos += static_cast<float>(size);
+
+            int i1 = static_cast<int>(readPos);
+            int i2 = (i1 + 1) % size;
+            float frac = readPos - static_cast<float>(i1);
+
+            return buffer[i1] * (1.0f - frac) + buffer[i2] * frac;
+        }
+
+        inline void write(float x) {
+            buffer[pos] = x;
+            pos++;
+            if (pos >= size) pos = 0;
+        }
+    };
+
+    DelayLine delays[8];
+
+    float feedback[8] = {
+            0.78f, 0.80f, 0.82f, 0.84f,
+            0.76f, 0.79f, 0.81f, 0.83f
+    };
+
+    float baseDelay[8] = {
+            1423.0f, 1557.0f, 1617.0f, 1789.0f,
+            1867.0f, 1999.0f, 2137.0f, 2251.0f
+    };
+
+    float modPhase[8] = {};
+    float modSpeed[8] = {
+            0.10f, 0.12f, 0.09f, 0.11f,
+            0.13f, 0.08f, 0.14f, 0.07f
+    };
+
+public:
+    std::atomic<float> mix{0.0f};
+
+    inline float processSample(float x) {
+        float m = mix.load(std::memory_order_relaxed);
+        if (m < 0.01f) return x;
+        float out = 0.0f;
+
+#pragma GCC unroll 8
+        for (int i = 0; i < 8; i++) {
+            modPhase[i] += modSpeed[i];
+            if (modPhase[i] > 2.0f * static_cast<float>(M_PI)) modPhase[i] -= 2.0f * static_cast<float>(M_PI);
+
+            float mod = sinf(modPhase[i]) * 5.0f;
+
+            float delayTime = baseDelay[i] + mod;
+
+            float delayed = delays[i].read(delayTime);
+
+            float input = x + delayed * feedback[i] + DENORMAL_OFFSET;
+
+            delays[i].write(input);
+
+            out += delayed;
+        }
+
+        return x * (1.0f - m) + (out * 0.125f) * m;
+    }
+
+    inline void processBlock(float* __restrict__ left, float* __restrict__ right, int count) {
+        float m = mix.load(std::memory_order_relaxed);
+        if (m < 0.01f) return;
+
+        for (int i = 0; i < count; i++) {
+            float l = processSample(left[i]);
+            float r = processSample(right[i]);
+
+            float wetL = l * 0.7f + r * 0.3f;
+            float wetR = r * 0.7f + l * 0.3f;
+
+            left[i] = wetL;
+            right[i] = wetR;
+        }
+    }
+};
+
+class CompressorOptimized {
+public:
+    std::atomic<float> threshold{0.3f}, ratio{4.0f}, attack{0.08f}, release{0.8f};
+    std::atomic<float> sampleRate{44100.0f};
+    std::atomic<bool> enabled{false};
+private:
+    float envelopeL = 0.0f, envelopeR = 0.0f;
+    float attackCoef = 0.0f, releaseCoef = 0.0f;
+public:
+    inline void updateCoefficients() {
+        float a = attack.load(std::memory_order_relaxed);
+        float r = release.load(std::memory_order_relaxed);
+        float sr = sampleRate.load(std::memory_order_relaxed);
+
+        attackCoef = expf(-1.0f / (a * sr));
+        releaseCoef = expf(-1.0f / (r * sr));
+    }
+    inline void processBlock(float* __restrict__ buffer, int count, float& envelope) {
+        updateCoefficients();
+        float th = threshold.load(std::memory_order_acquire);
+        float rt = ratio.load(std::memory_order_acquire);
+        for(int i=0; i<count; i++){
+            float absInput = fabsf(buffer[i]);
+            envelope = (absInput > envelope) ? attackCoef*envelope + (1.0f-attackCoef)*absInput : releaseCoef*envelope + (1.0f-releaseCoef)*absInput;
+            float gain = (envelope>th)? (th + (envelope-th)/rt)/(envelope+1e-9f) : 1.0f;
+            buffer[i]*=gain;
+        }
+    }
+    inline void process(float* __restrict__ left, float* __restrict__ right, int count) {
+        if (!enabled.load(std::memory_order_acquire)) return;
+        processBlock(left, count, envelopeL);
+        processBlock(right, count, envelopeR);
+    }
+};
+
+static std::atomic<float> gStereoWidth{1.0f};
+alignas(16) std::array<float, 4096> gLeftBuf, gRightBuf;
+alignas(16) std::array<float, 256> gFFTData;
+
+inline void fastFFT(std::complex<float>* __restrict__ data, int n) {
+    for (int i = 1, j = 0; i < n; i++) {
+        int bit = n >> 1;
+        for (; j & bit; bit >>= 1) j ^= bit;
+        j ^= bit;
+        if (i < j) std::swap(data[i], data[j]);
+    }
+    for (int len = 2; len <= n; len <<= 1) {
+        float ang = -2.0f * static_cast<float>(M_PI) / static_cast<float>(len);
+        std::complex<float> wlen(cosf(ang), sinf(ang));
+        for (int i = 0; i < n; i += len) {
+            std::complex<float> w(1.0f);
+            for (int j = 0; j < len / 2; j++) {
+                std::complex<float> u = data[i + j];
+                std::complex<float> v = data[i + j + len / 2] * w;
+                data[i + j] = u + v;
+                data[i + j + len / 2] = u - v;
+                w *= wlen;
+            }
+        }
+    }
+}
+
+inline void applyHannWindowToReal(std::complex<float>* __restrict__ data, int size) {
+    const auto fSizeMinus1 = static_cast<float>(size - 1);
+    for (int i = 0; i < size; i++) {
+        float window = 0.5f * (1.0f - cosf(2.0f * static_cast<float>(M_PI) * static_cast<float>(i) / fSizeMinus1));
+        data[i] = std::complex<float>(data[i].real() * window, data[i].imag());
+    }
+}
+
+inline float fastSoftClip(float x) {
+    float ax = fabsf(x);
+    float sign = x > 0.0f ? 1.0f : -1.0f;
+    if (ax > 1.0f) return sign;
+    return x * (1.5f - 0.5f * x * x);
+}
+
+static EqBandInterpolator gEqL[NUM_EQ_BANDS];
+static EqBandInterpolator gEqR[NUM_EQ_BANDS];
+static BassFilter gBassL, gBassR;
+static CompressorOptimized gCompressor;
+static ReverbOptimized gReverbL, gReverbR;
+static std::array<std::complex<float>, FFT_SIZE> gFFTWork;
+static int gEqUpdateCounter = 0;
+
+inline void updateAllEqBands() {
+    float sr = gSampleRate.load(std::memory_order_acquire);
+    for (int b = 0; b < NUM_EQ_BANDS; b++) {
+        float g = gEqL[b].targetGain.load(std::memory_order_acquire);
+        gEqL[b].setCoefficients(sr, EQ_FREQUENCIES[static_cast<size_t>(b)], g, 1.0f);
+        gEqR[b].setCoefficients(sr, EQ_FREQUENCIES[static_cast<size_t>(b)], g, 1.0f);
+    }
+}
+
+extern "C" {
+
+JNIEXPORT void JNICALL Java_com_michatec_radio_helpers_NativeAudioProcessor_setSampleRate(JNIEnv*, jobject, jfloat sr) {
+    gSampleRate.store(sr, std::memory_order_release);
+    gCompressor.sampleRate.store(sr, std::memory_order_release);
+    gBassL.applyGain(sr);
+    gBassR.applyGain(sr);
+    gEqUpdateCounter = 1;
+}
+JNIEXPORT void JNICALL Java_com_michatec_radio_helpers_NativeAudioProcessor_setDrcEnabled(JNIEnv*, jobject, jboolean e) {
+    gCompressor.enabled.store(e == JNI_TRUE, std::memory_order_release);
+}
+JNIEXPORT void JNICALL Java_com_michatec_radio_helpers_NativeAudioProcessor_setReverbMix(JNIEnv*, jobject, jfloat m) {
+    gReverbL.mix.store(m, std::memory_order_release);
+    gReverbR.mix.store(m, std::memory_order_release);
+}
+JNIEXPORT void JNICALL Java_com_michatec_radio_helpers_NativeAudioProcessor_setEqFull(JNIEnv* env, jobject thiz, jfloatArray gains) {
+    if (!gains) return;
+    
+    jsize len = env->GetArrayLength(gains);
+    int bandsToUpdate = std::min(static_cast<int>(len), NUM_EQ_BANDS);
+    
+    jfloat* gainsPtr = env->GetFloatArrayElements(gains, nullptr);
+    if (!gainsPtr) return;
+    
+    for (int b = 0; b < bandsToUpdate; b++) {
+        gEqL[b].setTargetGain(gainsPtr[b]);
+        gEqR[b].setTargetGain(gainsPtr[b]);
+    }
+    
+    gEqUpdateCounter = 1;
+    
+    env->ReleaseFloatArrayElements(gains, gainsPtr, JNI_ABORT);
+}
+JNIEXPORT void JNICALL Java_com_michatec_radio_helpers_NativeAudioProcessor_setBassBoost(JNIEnv*, jobject, jfloat g) {
+    float scaledGain = g * 4.0f;
+    gBassL.targetGain.store(scaledGain, std::memory_order_release);
+    gBassR.targetGain.store(scaledGain, std::memory_order_release);
+    float sr = gSampleRate.load(std::memory_order_acquire);
+    gBassL.applyGain(sr);
+    gBassR.applyGain(sr);
+    if (std::abs(g) > 0.01f) {
+        gBassL.active.store(true, std::memory_order_release);
+        gBassR.active.store(true, std::memory_order_release);
+    } else {
+        gBassL.active.store(false, std::memory_order_release);
+        gBassR.active.store(false, std::memory_order_release);
+    }
+}
+JNIEXPORT void JNICALL Java_com_michatec_radio_helpers_NativeAudioProcessor_setStereoWidth(JNIEnv*, jobject, jfloat w) {
+    gStereoWidth.store(fmaxf(0.0f, fminf(w, 2.0f)), std::memory_order_release);
+}
+
+JNIEXPORT jfloatArray JNICALL Java_com_michatec_radio_helpers_NativeAudioProcessor_getFftData(JNIEnv* env, jobject) {
+    jfloatArray arr = env->NewFloatArray(256);
+    env->SetFloatArrayRegion(arr, 0, 256, gFFTData.data());
+    return arr;
+}
+
+inline void computeLogarithmicFFT(float* output, const std::complex<float>* input, int inputSize) {
+    float sr = gSampleRate.load(std::memory_order_acquire);
+    float binWidth = sr / (2.0f * static_cast<float>(inputSize));
+    constexpr int NUM_BANDS = 256;
+    constexpr float MIN_FREQ = 20.0f;
+    constexpr float MAX_FREQ = 20000.0f;
+    float logMin = logf(MIN_FREQ);
+    float logMax = logf(MAX_FREQ);
+    float logRange = logMax - logMin;
+    
+    for (int b = 0; b < NUM_BANDS; b++) {
+        float f1 = expf(logMin + (logRange * static_cast<float>(b) / static_cast<float>(NUM_BANDS)));
+        float f2 = expf(logMin + (logRange * static_cast<float>(b + 1) / static_cast<float>(NUM_BANDS)));
+        int idx1 = static_cast<int>(f1 / binWidth);
+        int idx2 = static_cast<int>(f2 / binWidth);
+        idx1 = std::max(0, std::min(idx1, inputSize - 1));
+        idx2 = std::max(0, std::min(idx2, inputSize - 1));
+        
+        float sum = 0.0f;
+        int count = idx2 - idx1 + 1;
+        for (int i = idx1; i <= idx2 && i < inputSize; i++) {
+            sum += std::abs(input[i]);
+        }
+        float avg = (count > 0) ? sum / static_cast<float>(count) : 0.0f;
+        output[b] = avg * 0.5f;
+    }
+}
+
+JNIEXPORT void JNICALL Java_com_michatec_radio_helpers_NativeAudioProcessor_processAudioDirect(JNIEnv* env, jobject, jobject byteBuffer, jint size) {
+    auto* buffer = static_cast<jshort*>(env->GetDirectBufferAddress(byteBuffer));
+    if (!buffer) return;
+    int numFrames = (size / 2) / 2;
+    if (numFrames > 4096) numFrames = 4096;
+
+    if (gEqUpdateCounter > 0) {
+        updateAllEqBands();
+        gEqUpdateCounter--;
+    }
+
+    for (int i = 0; i < numFrames; i++) {
+        gLeftBuf[static_cast<size_t>(i)] = static_cast<float>(buffer[i * 2]) * INV_32768;
+        gRightBuf[static_cast<size_t>(i)] = static_cast<float>(buffer[i * 2 + 1]) * INV_32768;
+    }
+
+    for (int i = 0; i < numFrames; i++) {
+        float xL = gLeftBuf[static_cast<size_t>(i)];
+        float xR = gRightBuf[static_cast<size_t>(i)];
+
+        for (int b = 0; b < NUM_EQ_BANDS; b++) {
+            xL = gEqL[b].process(xL);
+            xR = gEqR[b].process(xR);
+        }
+
+        gLeftBuf[static_cast<size_t>(i)] = xL;
+        gRightBuf[static_cast<size_t>(i)] = xR;
+    }
+
+    for(int i = 0; i < numFrames; i++) {
+        gLeftBuf[static_cast<size_t>(i)] = gBassL.process(gLeftBuf[static_cast<size_t>(i)]);
+        gRightBuf[static_cast<size_t>(i)] = gBassR.process(gRightBuf[static_cast<size_t>(i)]);
+    }
+
+    gReverbL.processBlock(gLeftBuf.data(), gRightBuf.data(), numFrames);
+
+    float stereoWidth = gStereoWidth.load(std::memory_order_relaxed);
+    if (stereoWidth != 1.0f) {
+        float halfWidth = stereoWidth * 0.5f;
+        for (int j = 0; j < numFrames; j++) {
+            float mid = (gLeftBuf[static_cast<size_t>(j)] + gRightBuf[static_cast<size_t>(j)]) * 0.5f;
+            float side = (gLeftBuf[static_cast<size_t>(j)] - gRightBuf[static_cast<size_t>(j)]) * halfWidth;
+            gLeftBuf[static_cast<size_t>(j)] = mid + side;
+            gRightBuf[static_cast<size_t>(j)] = mid - side;
+        }
+    }
+
+    gCompressor.process(gLeftBuf.data(), gRightBuf.data(), numFrames);
+
+    if (numFrames >= FFT_SIZE) {
+        for (int k = 0; k < FFT_SIZE; k++) {
+            gFFTWork[static_cast<size_t>(k)] = std::complex<float>(gLeftBuf[static_cast<size_t>(k)], 0.0f);
+        }
+    } else {
+        for (int k = 0; k < numFrames; k++) {
+            gFFTWork[static_cast<size_t>(k)] = std::complex<float>(gLeftBuf[static_cast<size_t>(k)], 0.0f);
+        }
+        for (int k = numFrames; k < FFT_SIZE; k++) {
+            gFFTWork[static_cast<size_t>(k)] = std::complex<float>(0.0f, 0.0f);
+        }
+    }
+    
+    applyHannWindowToReal(gFFTWork.data(), FFT_SIZE);
+    fastFFT(gFFTWork.data(), FFT_SIZE);
+    computeLogarithmicFFT(gFFTData.data(), gFFTWork.data(), FFT_SIZE / 2);
+
+    for (int k = 0; k < numFrames; k++) {
+        buffer[k * 2] = static_cast<jshort>(fastSoftClip(gLeftBuf[static_cast<size_t>(k)]) * 32767.0f);
+        buffer[k * 2 + 1] = static_cast<jshort>(fastSoftClip(gRightBuf[static_cast<size_t>(k)]) * 32767.0f);
+    }
+}
+}

app/src/main/cpp/extra.cpp

@@ -0,0 +1,86 @@
+#include <jni.h>
+#include <android/native_window_jni.h>
+#include <android/native_window.h>
+#include <android/log.h>
+#include <vector>
+#include <algorithm>
+#include <cmath>
+
+extern "C" {
+
+JNIEXPORT void JNICALL
+Java_com_michatec_radio_helpers_ExtrasHelper_visualize(JNIEnv *env, jclass clazz, jobject surface, jfloatArray data) {
+    if (!surface) return;
+    ANativeWindow* window = ANativeWindow_fromSurface(env, surface);
+    if (!window) return;
+
+    jsize len = env->GetArrayLength(data);
+    if (len == 0) {
+        ANativeWindow_release(window);
+        return;
+    }
+    jfloat* body = env->GetFloatArrayElements(data, nullptr);
+
+    ANativeWindow_Buffer buffer;
+    ANativeWindow_setBuffersGeometry(window, 0, 0, WINDOW_FORMAT_RGBA_8888);
+
+    if (ANativeWindow_lock(window, &buffer, nullptr) == 0) {
+        auto* pixels = static_cast<uint32_t*>(buffer.bits);
+
+        // Clear background (Dark Grey)
+        for (int y = 0; y < buffer.height; y++) {
+            uint32_t* row = pixels + (y * buffer.stride);
+            for (int x = 0; x < buffer.width; x++) {
+                row[x] = 0xFF121212;
+            }
+        }
+
+        // Draw bars - fewer bins = thicker bars
+        int displayBins = 40;
+        float barWidth = static_cast<float>(buffer.width) / static_cast<float>(displayBins);
+        int padding = static_cast<int>(barWidth * 0.2f);
+        if (padding < 1) padding = 1;
+
+        for (int i = 0; i < displayBins; i++) {
+            // Map display bin to data index
+            int dataIdx = (i * len) / displayBins;
+            float val = body[dataIdx];
+
+            // Use square root to compress the range (so peaks don't hit the top too easily)
+            // and a lower multiplier (0.4f) to reduce overall height
+            float scaledVal = sqrtf(val) * 0.5f;
+            int barHeight = static_cast<int>(scaledVal * static_cast<float>(buffer.height));
+
+            // Cap height at 75% to leave some room at the top
+            int maxH = static_cast<int>(static_cast<float>(buffer.height) * 0.75f);
+            if (barHeight > maxH) barHeight = maxH;
+            if (barHeight < 4) barHeight = 4; // Minimal visible line
+
+            int startX = static_cast<int>(static_cast<float>(i) * barWidth);
+            int endX = static_cast<int>(static_cast<float>(i + 1) * barWidth);
+
+            int drawStartX = startX + padding;
+            int drawEndX = endX - padding;
+            if (drawEndX <= drawStartX) drawEndX = drawStartX + 1;
+
+            int barBottom = buffer.height - 4; // Bottom margin
+            int barTop = barBottom - barHeight;
+
+            for (int x = drawStartX; x < drawEndX; x++) {
+                if (x < 0 || x >= buffer.width) continue;
+                for (int y = barTop; y < barBottom; y++) {
+                    if (y < 0 || y >= buffer.height) continue;
+                    // Using the same color, but now height is controlled
+                    pixels[y * buffer.stride + x] = 0xFFC5DA03;
+                }
+            }
+        }
+
+        ANativeWindow_unlockAndPost(window);
+    }
+
+    env->ReleaseFloatArrayElements(data, body, JNI_ABORT);
+    ANativeWindow_release(window);
+}
+
+} // extern "C"

app/src/main/java/com/michatec/radio/AddStationFragment.kt

@@ -0,0 +1,214 @@
+package com.michatec.radio
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.view.inputmethod.InputMethodManager
+import android.widget.Button
+import android.widget.EditText
+import android.widget.ProgressBar
+import androidx.appcompat.widget.SearchView
+import androidx.core.view.isGone
+import androidx.core.view.isVisible
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import androidx.navigation.fragment.findNavController
+import androidx.recyclerview.widget.DefaultItemAnimator
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.google.android.material.textview.MaterialTextView
+import com.michatec.radio.collection.CollectionViewModel
+import com.michatec.radio.core.Station
+import com.michatec.radio.helpers.CollectionHelper
+import com.michatec.radio.helpers.NetworkHelper
+import com.michatec.radio.search.DirectInputCheck
+import com.michatec.radio.search.RadioBrowserResult
+import com.michatec.radio.search.RadioBrowserSearch
+import com.michatec.radio.search.SearchResultAdapter
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers.IO
+import kotlinx.coroutines.Dispatchers.Main
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+class AddStationFragment : Fragment(),
+    SearchResultAdapter.SearchResultAdapterListener,
+    RadioBrowserSearch.RadioBrowserSearchListener,
+    DirectInputCheck.DirectInputCheckListener {
+
+    private lateinit var collectionViewModel: CollectionViewModel
+    private lateinit var stationSearchBoxView: SearchView
+    private lateinit var searchRequestProgressIndicator: ProgressBar
+    private lateinit var noSearchResultsTextView: MaterialTextView
+    private lateinit var stationSearchResultList: RecyclerView
+    private lateinit var positiveButton: Button
+    private lateinit var negativeButton: Button
+    private lateinit var searchResultAdapter: SearchResultAdapter
+    private lateinit var radioBrowserSearch: RadioBrowserSearch
+    private lateinit var directInputCheck: DirectInputCheck
+    private var station: Station = Station()
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        // We reuse the dialog layout as it's already optimized for TV in layout-television
+        val view = inflater.inflate(R.layout.dialog_find_station, container, false)
+        
+        collectionViewModel = ViewModelProvider(requireActivity())[CollectionViewModel::class.java]
+        radioBrowserSearch = RadioBrowserSearch(this)
+        directInputCheck = DirectInputCheck(this)
+
+        stationSearchBoxView = view.findViewById(R.id.station_search_box_view)
+        searchRequestProgressIndicator = view.findViewById(R.id.search_request_progress_indicator)
+        stationSearchResultList = view.findViewById(R.id.station_search_result_list)
+        noSearchResultsTextView = view.findViewById(R.id.no_results_text_view)
+        positiveButton = view.findViewById(R.id.dialog_positive_button)
+        negativeButton = view.findViewById(R.id.dialog_negative_button)
+
+        setupRecyclerView()
+        setupSearchView()
+
+        positiveButton.setOnClickListener {
+            addStationAndExit()
+        }
+
+        negativeButton.setOnClickListener {
+            searchResultAdapter.stopPrePlayback()
+            findNavController().navigateUp()
+        }
+
+        stationSearchBoxView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
+            override fun onQueryTextChange(query: String): Boolean {
+                handleSearch(query)
+                return true
+            }
+            override fun onQueryTextSubmit(query: String): Boolean {
+                handleSearch(query)
+                return true
+            }
+        })
+
+        return view
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        // Stop playback when fragment is destroyed (e.g. via back button)
+        if (this::searchResultAdapter.isInitialized) {
+            searchResultAdapter.stopPrePlayback()
+        }
+    }
+
+    private fun setupRecyclerView() {
+        searchResultAdapter = SearchResultAdapter(this, listOf())
+        stationSearchResultList.adapter = searchResultAdapter
+        stationSearchResultList.layoutManager = LinearLayoutManager(context)
+        stationSearchResultList.itemAnimator = DefaultItemAnimator()
+    }
+
+    private fun setupSearchView() {
+        // TV specific: ensure keyboard opens when search view gets focus
+        stationSearchBoxView.setOnQueryTextFocusChangeListener { v, hasFocus ->
+            if (hasFocus) {
+                // Find the internal EditText of the SearchView
+                val searchEditText = v.findViewById<EditText>(androidx.appcompat.R.id.search_src_text)
+                if (searchEditText != null) {
+                    searchEditText.requestFocus()
+                    val imm = requireContext().getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+                    imm.showSoftInput(searchEditText, InputMethodManager.SHOW_IMPLICIT)
+                }
+            }
+        }
+
+        // Make the SearchView always expanded and ready for input
+        stationSearchBoxView.isIconified = false
+    }
+
+    private fun handleSearch(query: String) {
+        if (query.isEmpty()) {
+            resetLayout(true)
+            return
+        }
+        showProgressIndicator()
+        if (query.startsWith("http")) {
+            directInputCheck.checkStationAddress(requireContext(), query)
+        } else {
+            radioBrowserSearch.searchStation(requireContext(), query, Keys.SEARCH_TYPE_BY_KEYWORD)
+        }
+    }
+
+    private fun addStationAndExit() {
+        searchResultAdapter.stopPrePlayback()
+        val currentCollection = collectionViewModel.collectionLiveData.value ?: return
+        if (station.streamContent.isNotEmpty() && station.streamContent != Keys.MIME_TYPE_UNSUPPORTED) {
+            CollectionHelper.addStation(requireContext(), currentCollection, station)
+            findNavController().navigateUp()
+        } else {
+            CoroutineScope(IO).launch {
+                val contentType = NetworkHelper.detectContentType(station.getStreamUri())
+                station.streamContent = contentType.type
+                withContext(Main) {
+                    CollectionHelper.addStation(requireContext(), currentCollection, station)
+                    findNavController().navigateUp()
+                }
+            }
+        }
+    }
+
+    override fun onSearchResultTapped(result: Station) {
+        station = result
+        activateAddButton()
+    }
+
+    override fun activateAddButton() {
+        positiveButton.isEnabled = true
+    }
+
+    override fun deactivateAddButton() {
+        positiveButton.isEnabled = false
+    }
+
+    @SuppressLint("NotifyDataSetChanged")
+    override fun onRadioBrowserSearchResults(results: Array<RadioBrowserResult>) {
+        if (results.isNotEmpty()) {
+            searchResultAdapter.searchResults = results.map { it.toStation() }
+            searchResultAdapter.notifyDataSetChanged()
+            resetLayout(false)
+        } else {
+            showNoResultsError()
+        }
+    }
+
+    @SuppressLint("NotifyDataSetChanged")
+    override fun onDirectInputCheck(stationList: MutableList<Station>) {
+        if (stationList.isNotEmpty()) {
+            searchResultAdapter.searchResults = stationList
+            searchResultAdapter.notifyDataSetChanged()
+            resetLayout(false)
+        } else {
+            showNoResultsError()
+        }
+    }
+
+    private fun resetLayout(clear: Boolean) {
+        positiveButton.isEnabled = false
+        searchRequestProgressIndicator.isGone = true
+        noSearchResultsTextView.isGone = true
+        if (clear) searchResultAdapter.resetSelection(true)
+    }
+
+    private fun showProgressIndicator() {
+        searchRequestProgressIndicator.isVisible = true
+        noSearchResultsTextView.isGone = true
+    }
+
+    private fun showNoResultsError() {
+        searchRequestProgressIndicator.isGone = true
+        noSearchResultsTextView.isVisible = true
+    }
+}

app/src/main/java/com/michatec/radio/CastOptionsProvider.kt

@@ -0,0 +1,33 @@
+package com.michatec.radio
+
+import android.content.Context
+import com.google.android.gms.cast.CastMediaControlIntent
+import com.google.android.gms.cast.framework.CastOptions
+import com.google.android.gms.cast.framework.OptionsProvider
+import com.google.android.gms.cast.framework.SessionProvider
+import com.google.android.gms.cast.framework.media.CastMediaOptions
+import com.google.android.gms.cast.framework.media.NotificationOptions
+
+@Suppress("unused")
+class CastOptionsProvider : OptionsProvider {
+    override fun getCastOptions(context: Context): CastOptions {
+        val notificationOptions = NotificationOptions.Builder()
+            .setTargetActivityClassName(MainActivity::class.java.name)
+            .build()
+        val mediaOptions = CastMediaOptions.Builder()
+            .setNotificationOptions(notificationOptions)
+            .setExpandedControllerActivityClassName(ExpandedControllerActivity::class.java.name)
+            .build()
+
+        return CastOptions.Builder()
+            .setReceiverApplicationId(CastMediaControlIntent.DEFAULT_MEDIA_RECEIVER_APPLICATION_ID)
+            .setResumeSavedSession(true)
+            .setStopReceiverApplicationWhenEndingSession(true)
+            .setCastMediaOptions(mediaOptions)
+            .build()
+    }
+
+    override fun getAdditionalSessionProviders(context: Context): List<SessionProvider>? {
+        return null
+    }
+}

app/src/main/java/com/michatec/radio/EqualizerFragment.kt

@@ -0,0 +1,68 @@
+package com.michatec.radio
+
+import android.os.Bundle
+import android.view.View
+import androidx.appcompat.app.AppCompatActivity
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.SeekBarPreference
+import com.michatec.radio.helpers.PreferencesHelper
+
+/*
+ * EqualizerFragment class: Handles audio frequency settings with 10-band EQ
+ */
+class EqualizerFragment : PreferenceFragmentCompat() {
+
+    // EQ band frequencies matching radio.cpp
+    private val eqFrequencies = arrayOf("31 Hz", "62 Hz", "125 Hz", "250 Hz", "500 Hz", "1 kHz", "2 kHz", "4 kHz", "8 kHz", "16 kHz")
+    private val eqKeys = arrayOf(
+        Keys.PREF_EQ_LOW,           // Band 0: 31 Hz
+        Keys.PREF_EQ_BAND_1,        // Band 1: 62 Hz
+        Keys.PREF_EQ_BAND_2,        // Band 2: 125 Hz
+        Keys.PREF_EQ_BAND_3,        // Band 3: 250 Hz
+        Keys.PREF_EQ_BAND_4,        // Band 4: 500 Hz
+        Keys.PREF_EQ_BAND_5,        // Band 5: 1 kHz
+        Keys.PREF_EQ_MID,           // Band 6: 2 kHz
+        Keys.PREF_EQ_BAND_6,        // Band 7: 4 kHz
+        Keys.PREF_EQ_BAND_7,        // Band 8: 8 kHz
+        Keys.PREF_EQ_HIGH           // Band 9: 16 kHz
+    )
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        (activity as AppCompatActivity).supportActionBar?.title = getString(R.string.pref_equalizer_title)
+    }
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        val context = preferenceManager.context
+        val screen = preferenceManager.createPreferenceScreen(context)
+
+        // Reset Button
+        val resetPreference = Preference(context)
+        resetPreference.title = getString(R.string.pref_equalizer_reset_title)
+        resetPreference.setIcon(R.drawable.ic_refresh_24dp)
+        resetPreference.setOnPreferenceClickListener {
+            PreferencesHelper.resetEqualizer()
+            for (key in eqKeys) {
+                findPreference<SeekBarPreference>(key)?.value = 0
+            }
+            return@setOnPreferenceClickListener true
+        }
+        screen.addPreference(resetPreference)
+
+        // Create 10-band EQ
+        for (i in eqKeys.indices) {
+            val eqBand = SeekBarPreference(context)
+            eqBand.title = "Equalizer: ${eqFrequencies[i]}"
+            eqBand.key = eqKeys[i]
+            eqBand.setIcon(R.drawable.ic_music_note_24dp)
+            eqBand.min = -12
+            eqBand.max = 12
+            eqBand.showSeekBarValue = true
+            eqBand.setDefaultValue(0)
+            screen.addPreference(eqBand)
+        }
+
+        preferenceScreen = screen
+    }
+}

app/src/main/java/com/michatec/radio/ExpandedControllerActivity.kt

@@ -0,0 +1,14 @@
+package com.michatec.radio
+
+import android.view.Menu
+import com.google.android.gms.cast.framework.CastButtonFactory
+import com.google.android.gms.cast.framework.media.widget.ExpandedControllerActivity
+
+class ExpandedControllerActivity : ExpandedControllerActivity() {
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        super.onCreateOptionsMenu(menu)
+        menuInflater.inflate(R.menu.expanded_controller, menu)
+        CastButtonFactory.setUpMediaRouteButton(this, menu, R.id.media_route_menu_item)
+        return true
+    }
+}

app/src/main/java/com/michatec/radio/Keys.kt

@@ -1,17 +1,3 @@
-/*
- * Keys.kt
- * Implements the keys used throughout the app
- * This object hosts all keys used to control Radio state
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio
 
 import java.util.*
@@ -41,6 +27,7 @@ object Keys {
     const val EXTRA_START_LAST_PLAYED_STATION: String = "START_LAST_PLAYED_STATION"
     const val EXTRA_SLEEP_TIMER_REMAINING: String = "SLEEP_TIMER_REMAINING"
     const val EXTRA_METADATA_HISTORY: String = "METADATA_HISTORY"
+    const val EXTRA_VISUALIZER_DATA: String = "VISUALIZER_DATA"
 
     // arguments
     const val ARG_UPDATE_COLLECTION: String = "ArgUpdateCollection"
@@ -57,10 +44,10 @@ object Keys {
     const val CMD_PLAY_STREAM: String = "PLAY_STREAM"
     const val CMD_REQUEST_SLEEP_TIMER_REMAINING: String = "REQUEST_SLEEP_TIMER_REMAINING"
     const val CMD_REQUEST_METADATA_HISTORY: String = "REQUEST_METADATA_HISTORY"
+    const val CMD_GET_VISUALIZER_DATA: String = "GET_VISUALIZER_DATA"
 
     // preferences
     const val PREF_RADIO_BROWSER_API: String = "RADIO_BROWSER_API"
-    const val PREF_ONE_TIME_HOUSEKEEPING_NECESSARY: String = "ONE_TIME_HOUSEKEEPING_NECESSARY_VERSIONCODE_95" // increment to current app version code to trigger housekeeping that runs only once
     const val PREF_THEME_SELECTION: String = "THEME_SELECTION"
     const val PREF_LAST_UPDATE_COLLECTION: String = "LAST_UPDATE_COLLECTION"
     const val PREF_COLLECTION_SIZE: String = "COLLECTION_SIZE"
@@ -75,11 +62,39 @@ object Keys {
     const val PREF_LARGE_BUFFER_SIZE: String = "LARGE_BUFFER_SIZE"
     const val PREF_EDIT_STATIONS: String = "EDIT_STATIONS"
     const val PREF_EDIT_STREAMS_URIS: String = "EDIT_STREAMS_URIS"
+    const val PREF_BASS_BOOST: String = "BASS_BOOST"
+    const val PREF_REVERB: String = "REVERB"
+    const val PREF_DRC: String = "DRC"
+    const val PREF_EQ_LOW: String = "EQ_LOW"
+    const val PREF_EQ_MID: String = "EQ_MID"
+    const val PREF_EQ_HIGH: String = "EQ_HIGH"
+    const val PREF_EQUALIZER: String = "EQUALIZER_SETTINGS"
+    const val PREF_EQ_BAND_1: String = "EQ_BAND_1"
+    const val PREF_EQ_BAND_2: String = "EQ_BAND_2"
+    const val PREF_EQ_BAND_3: String = "EQ_BAND_3"
+    const val PREF_EQ_BAND_4: String = "EQ_BAND_4"
+    const val PREF_EQ_BAND_5: String = "EQ_BAND_5"
+    const val PREF_EQ_BAND_6: String = "EQ_BAND_6"
+    const val PREF_EQ_BAND_7: String = "EQ_BAND_7"
+    const val PREF_PRESET_SELECTED: String = "PRESET_SELECTED"
+    const val PREF_PRESET_EQ_BAND_0: String = "PRESET_EQ_BAND_0"
+    const val PREF_PRESET_EQ_BAND_1: String = "PRESET_EQ_BAND_1"
+    const val PREF_PRESET_EQ_BAND_2: String = "PRESET_EQ_BAND_2"
+    const val PREF_PRESET_EQ_BAND_3: String = "PRESET_EQ_BAND_3"
+    const val PREF_PRESET_EQ_BAND_4: String = "PRESET_EQ_BAND_4"
+    const val PREF_PRESET_EQ_BAND_5: String = "PRESET_EQ_BAND_5"
+    const val PREF_PRESET_EQ_BAND_6: String = "PRESET_EQ_BAND_6"
+    const val PREF_PRESET_EQ_BAND_7: String = "PRESET_EQ_BAND_7"
+    const val PREF_PRESET_EQ_BAND_8: String = "PRESET_EQ_BAND_8"
+    const val PREF_PRESET_EQ_BAND_9: String = "PRESET_EQ_BAND_9"
+    const val PREF_PRESET_BASS_BOOST: String = "PRESET_BASS_BOOST"
+    const val PREF_PRESET_REVERB: String = "PRESET_REVERB"
+    const val PREF_PRESET_DRC: String = "PRESET_DRC"
+    const val PREF_PRESET_STEREO_WIDTH: String = "PRESET_STEREO_WIDTH"
 
     // default const values
     const val DEFAULT_SIZE_OF_METADATA_HISTORY: Int = 25
     const val DEFAULT_MAX_LENGTH_OF_METADATA_ENTRY: Int = 127
-    const val DEFAULT_DOWNLOAD_OVER_MOBILE: Boolean = false
     const val ACTIVE_DOWNLOADS_EMPTY: String = "zero"
     const val DEFAULT_MAX_RECONNECTION_COUNT: Int = 30
     const val LARGE_BUFFER_SIZE_MULTIPLIER: Int = 8
@@ -138,7 +153,7 @@ object Keys {
     const val FOLDER_AUDIO: String = "audio"
     const val FOLDER_IMAGES: String = "images"
     const val FOLDER_TEMP: String = "temp"
-    const val URLRADIO_LEGACY_FOLDER_COLLECTION: String = "Collection"
+    const val RADIO_LEGACY_FOLDER_COLLECTION: String = "Collection"
 
     // file names and extensions
     const val COLLECTION_FILE: String = "collection.json"
@@ -150,9 +165,6 @@ object Keys {
     const val RADIO_BROWSER_API_BASE: String = "all.api.radio-browser.info"
     const val RADIO_BROWSER_API_DEFAULT: String = "de1.api.radio-browser.info"
 
-    // locations
-    const val LOCATION_DEFAULT_STATION_IMAGE: String = "android.resource://com.michatec.radio/drawable/ic_default_station_image_24dp"
-
     // sizes (in dp)
     const val SIZE_STATION_IMAGE_CARD: Int = 72
     const val SIZE_STATION_IMAGE_MAXIMUM: Int = 640

app/src/main/java/com/michatec/radio/MainActivity.kt

@@ -1,32 +1,23 @@
-/*
- * MainActivity.kt
- * Implements the MainActivity class
- * MainActivity is the default activity that can host the player fragment and the settings fragment
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio
 
 import android.content.SharedPreferences
+import android.content.pm.PackageManager
 import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.view.View
+import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
+import androidx.core.view.isVisible
 import androidx.navigation.fragment.NavHostFragment
 import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.NavigationUI
 import androidx.navigation.ui.navigateUp
 import com.michatec.radio.helpers.AppThemeHelper
 import com.michatec.radio.helpers.FileHelper
-import com.michatec.radio.helpers.ImportHelper
 import com.michatec.radio.helpers.PreferencesHelper
-
+import org.woheller69.freeDroidWarn.FreeDroidWarn
 
 /*
  * MainActivity class
@@ -36,22 +27,14 @@ class MainActivity : AppCompatActivity() {
     /* Main class variables */
     private lateinit var appBarConfiguration: AppBarConfiguration
 
-
     /* Overrides onCreate from AppCompatActivity */
     override fun onCreate(savedInstanceState: Bundle?) {
+        enableEdgeToEdge()
+        setTheme(R.style.AppTheme)
         super.onCreate(savedInstanceState)
 
-        // house-keeping: determine if edit stations is enabled by default todo: remove in 2023
+        // Free Android
-        if (PreferencesHelper.isHouseKeepingNecessary()) {
+        FreeDroidWarn.showWarningOnUpgrade(this, BuildConfig.VERSION_CODE)
-            // house-keeping 1: remove hard coded default image
-            ImportHelper.removeDefaultStationImageUris(this)
-            // house-keeping 2: if existing user detected, enable Edit Stations by default
-            if (PreferencesHelper.loadCollectionSize() != -1) {
-                // existing user detected - enable Edit Stations by default
-                PreferencesHelper.saveEditStationsEnabled(true)
-            }
-            PreferencesHelper.saveHouseKeepingNecessaryState()
-        }
 
         // set up views
         setContentView(R.layout.activity_main)
@@ -62,21 +45,51 @@ class MainActivity : AppCompatActivity() {
         // set up action bar
         setSupportActionBar(findViewById(R.id.main_toolbar))
         val toolbar: Toolbar = findViewById(R.id.main_toolbar)
-        val navHostFragment = supportFragmentManager.findFragmentById(R.id.main_host_container) as NavHostFragment
+        val navHostFragment =
+            supportFragmentManager.findFragmentById(R.id.main_host_container) as NavHostFragment
         val navController = navHostFragment.navController
         appBarConfiguration = AppBarConfiguration(navController.graph)
         NavigationUI.setupWithNavController(toolbar, navController, appBarConfiguration)
         supportActionBar?.hide()
 
+        // TV-specific loading logic: Hide the overlay once the app is ready
+        if (packageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
+            Handler(Looper.getMainLooper()).postDelayed({
+                hideLoadingOverlay()
+            }, 1200)
+        } else {
+            findViewById<View>(R.id.loading_layout)?.visibility = View.GONE
+        }
+
         // register listener for changes in shared preferences
         PreferencesHelper.registerPreferenceChangeListener(sharedPreferenceChangeListener)
     }
 
+    /* Hides the loading/splash overlay */
+    private fun hideLoadingOverlay() {
+        findViewById<View>(R.id.loading_layout)?.let { overlay ->
+            if (overlay.isVisible) {
+                overlay.animate().alpha(0f).setDuration(500)
+                    .withEndAction { overlay.visibility = View.GONE }
+            }
+        }
+    }
+
+
+    /* Overrides onResume from AppCompatActivity */
+    override fun onResume() {
+        try {
+            super.onResume()
+        } catch (_: ClassCastException) {
+            // Do nothing
+        }
+    }
+
 
     /* Overrides onSupportNavigateUp from AppCompatActivity */
     override fun onSupportNavigateUp(): Boolean {
-        // Taken from: https://developer.android.com/guide/navigation/navigation-ui#action_bar
+        val navHostFragment =
-        val navHostFragment = supportFragmentManager.findFragmentById(R.id.main_host_container) as NavHostFragment
+            supportFragmentManager.findFragmentById(R.id.main_host_container) as NavHostFragment
         val navController = navHostFragment.navController
         return navController.navigateUp(appBarConfiguration) || super.onSupportNavigateUp()
     }

app/src/main/java/com/michatec/radio/PlayerFragment.kt

@@ -1,17 +1,3 @@
-/*
- * PlayerFragment.kt
- * Implements the PlayerFragment class
- * PlayerFragment is the fragment that hosts Radio's list of stations and a player sheet
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio
 
 import android.app.Activity
@@ -32,17 +18,23 @@ import androidx.activity.OnBackPressedCallback
 import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.PickVisualMediaRequest
 import androidx.activity.result.contract.ActivityResultContracts
+import androidx.annotation.OptIn
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.net.toUri
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.updatePadding
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.ViewModelProvider
 import androidx.media3.common.MediaItem
 import androidx.media3.common.PlaybackException
 import androidx.media3.common.Player
+import androidx.media3.common.util.UnstableApi
 import androidx.media3.session.MediaController
 import androidx.media3.session.SessionResult
 import androidx.media3.session.SessionToken
+import androidx.navigation.fragment.findNavController
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.RecyclerView
 import com.android.volley.Request
@@ -179,9 +171,11 @@ class PlayerFragment : Fragment(),
         // hide action bar
         (activity as AppCompatActivity).supportActionBar?.hide()
 
-        // set the same background color of the player sheet for the navigation bar
+        ViewCompat.setOnApplyWindowInsetsListener(layout.rootView) { v, insets ->
-        (activity as AppCompatActivity).window.navigationBarColor = ContextCompat.getColor(requireActivity(), R.color.player_sheet_background)
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
-
+            v.updatePadding(bottom = systemBars.bottom)
+            insets
+        }
         // associate the ItemTouchHelper with the RecyclerView
         itemTouchHelper = ItemTouchHelper(ItemTouchHelperCallback())
         itemTouchHelper?.attachToRecyclerView(layout.recyclerView)
@@ -209,14 +203,14 @@ class PlayerFragment : Fragment(),
         }
 
         override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean {
-            val fromPosition = viewHolder.adapterPosition
+            val fromPosition = viewHolder.bindingAdapterPosition
-            val toPosition = target.adapterPosition
+            val toPosition = target.bindingAdapterPosition
             collectionAdapter.onItemMove(fromPosition, toPosition)
             return true
         }
 
         override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
-            val position = viewHolder.adapterPosition
+            val position = viewHolder.bindingAdapterPosition
             collectionAdapter.onItemDismiss(position)
         }
 
@@ -255,7 +249,6 @@ class PlayerFragment : Fragment(),
         // load player state
         playerState = PreferencesHelper.loadPlayerState()
         // recreate player ui
-//        setupPlaybackControls()
         updatePlayerViews()
         updateStationListState()
         togglePeriodicSleepTimerUpdateRequest()
@@ -263,8 +256,8 @@ class PlayerFragment : Fragment(),
         observeCollectionViewModel()
         // handle navigation arguments
         handleNavigationArguments()
-//        // handle start intent - if started via tap on rss link
+        // handle start intent - if started via tap on rss link
-//        handleStartIntent()
+        handleStartIntent()
         // start watching for changes in shared preferences
         PreferencesHelper.registerPreferenceChangeListener(this as SharedPreferences.OnSharedPreferenceChangeListener)
     }
@@ -350,8 +343,15 @@ class PlayerFragment : Fragment(),
 
     /* Overrides onAddNewButtonTapped from CollectionAdapterListener */
     override fun onAddNewButtonTapped() {
+        // stop playback when adding a new station
+        controller?.stop()
+
+        if (activity?.packageManager?.hasSystemFeature(PackageManager.FEATURE_LEANBACK) == true) {
+            findNavController().navigate(R.id.action_map_fragment_to_player_to_add_station)
+        } else {
             FindStationDialog(activity as Activity, this as FindStationDialog.FindStationDialogListener).show()
         }
+    }
 
 
     /* Overrides onChangeImageButtonTapped from CollectionAdapterListener */
@@ -395,6 +395,7 @@ class PlayerFragment : Fragment(),
 
 
     /* Initializes the MediaController - handles connection to PlayerService under the hood */
+    @OptIn(UnstableApi::class)
     private fun initializeController() {
         controllerFuture = MediaController.Builder(
             activity as Context,
@@ -409,6 +410,7 @@ class PlayerFragment : Fragment(),
 
     /* Releases MediaController */
     private fun releaseController() {
+        controller?.removeListener(playerListener)
         MediaController.releaseFuture(controllerFuture)
     }
 
@@ -417,6 +419,13 @@ class PlayerFragment : Fragment(),
     private fun setupController() {
         val controller: MediaController = this.controller ?: return
         controller.addListener(playerListener)
+
+        // Sync local playerState with actual controller state
+        if (playerState.isPlaying != controller.isPlaying) {
+            playerState.isPlaying = controller.isPlaying
+            updatePlayerViews()
+        }
+
         requestMetadataUpdate()
         // handle start intent
         handleStartIntent()
@@ -432,15 +441,15 @@ class PlayerFragment : Fragment(),
         val swipeToDeleteHandler = object : UiHelper.SwipeToDeleteCallback(activity as Context) {
             override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
                 // ask user
-                val adapterPosition: Int = viewHolder.adapterPosition
+                val bindingAdapterPosition: Int = viewHolder.bindingAdapterPosition
                 val dialogMessage =
-                    "${getString(R.string.dialog_yes_no_message_remove_station)}\n\n- ${collection.stations[adapterPosition].name}"
+                    "${getString(R.string.dialog_yes_no_message_remove_station)}\n\n- ${collection.stations[bindingAdapterPosition].name}"
                 YesNoDialog(this@PlayerFragment as YesNoDialog.YesNoDialogListener).show(
                     context = activity as Context,
                     type = Keys.DIALOG_REMOVE_STATION,
                     messageString = dialogMessage,
                     yesButton = R.string.dialog_yes_no_positive_button_remove_station,
-                    payload = adapterPosition
+                    payload = bindingAdapterPosition
                 )
             }
         }
@@ -452,15 +461,15 @@ class PlayerFragment : Fragment(),
             object : UiHelper.SwipeToMarkStarredCallback(activity as Context) {
                 override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
                     // mark card starred
-                    val adapterPosition: Int = viewHolder.adapterPosition
+                    val bindingAdapterPosition: Int = viewHolder.bindingAdapterPosition
-                    collectionAdapter.toggleStarredStation(activity as Context, adapterPosition)
+                    collectionAdapter.toggleStarredStation(activity as Context, bindingAdapterPosition)
                 }
             }
         val swipeToMarkStarredItemTouchHelper = ItemTouchHelper(swipeToMarkStarredHandler)
         swipeToMarkStarredItemTouchHelper.attachToRecyclerView(layout.recyclerView)
 
         // set up sleep timer start button
-        layout.sheetSleepTimerStartButtonView.setOnClickListener {
+        layout.sheetSleepTimerStartButtonView?.setOnClickListener {
             when (controller?.isPlaying) {
                 true -> {
                     val timePicker = MaterialTimePicker.Builder()
@@ -490,29 +499,29 @@ class PlayerFragment : Fragment(),
         }
 
         // set up sleep timer cancel button
-        layout.sheetSleepTimerCancelButtonView.setOnClickListener {
+        layout.sheetSleepTimerCancelButtonView?.setOnClickListener {
             playerState.sleepTimerRunning = false
             controller?.cancelSleepTimer()
             togglePeriodicSleepTimerUpdateRequest()
         }
 
+        // set up TV station navigation
+        layout.playerPrevButtonView?.setOnClickListener {
+            val currentPosition = CollectionHelper.getStationPosition(collection, playerState.stationUuid)
+            if (currentPosition > 0) {
+                val prevStation = collection.stations[currentPosition - 1]
+                onPlayButtonTapped(prevStation.uuid)
+            }
+        }
+        layout.playerNextButtonView?.setOnClickListener {
+            val currentPosition = CollectionHelper.getStationPosition(collection, playerState.stationUuid)
+            if (currentPosition < collection.stations.size - 1) {
+                val nextStation = collection.stations[currentPosition + 1]
+                onPlayButtonTapped(nextStation.uuid)
+            }
         }
 
-
+    }
-//    /* Sets up the general playback controls - Note: station specific controls and views are updated in updatePlayerViews() */
-//    // it is probably okay to suppress this warning - the OnTouchListener on the time played view does only toggle the time duration / remaining display
-//    private fun setupPlaybackControls() {
-//
-//        // main play/pause button
-//        layout.playButtonView.setOnClickListener {
-//            onPlayButtonTapped(playerState.stationUuid, playerState.playbackState)
-//            //onPlayButtonTapped(playerState.stationUuid, playerController.getPlaybackState().state) // todo remove
-//        }
-//
-//        // register a callback to stay in sync
-//        playerController.registerCallback(mediaControllerCallback)
-//    }
-
 
     /* Sets up the player */
     private fun updatePlayerViews() {
@@ -549,7 +558,7 @@ class PlayerFragment : Fragment(),
     private fun requestSleepTimerUpdate() {
         val resultFuture: ListenableFuture<SessionResult>? =
             controller?.requestSleepTimerRemaining()
-        resultFuture?.addListener(Runnable {
+        resultFuture?.addListener({
             val timeRemaining: Long = resultFuture.get().extras.getLong(Keys.EXTRA_SLEEP_TIMER_REMAINING)
             layout.updateSleepTimer(activity as Context, timeRemaining)
         }, MoreExecutors.directExecutor())
@@ -559,7 +568,7 @@ class PlayerFragment : Fragment(),
     /* Requests an update of the metadata history from the player service */
     private fun requestMetadataUpdate() {
         val resultFuture: ListenableFuture<SessionResult>? = controller?.requestMetadataHistory()
-        resultFuture?.addListener(Runnable {
+        resultFuture?.addListener({
             val metadata: ArrayList<String>? = resultFuture.get().extras.getStringArrayList(Keys.EXTRA_METADATA_HISTORY)
             layout.updateMetadata(metadata?.toMutableList())
         }, MoreExecutors.directExecutor())
@@ -573,22 +582,34 @@ class PlayerFragment : Fragment(),
 
     /* Handles this activity's start intent */
     private fun handleStartIntent() {
-        if ((activity as Activity).intent.action != null) {
+        val intent = (activity as Activity).intent
-            when ((activity as Activity).intent.action) {
+        if (intent.action != null && intent.action?.isNotEmpty() == true) {
-                Keys.ACTION_SHOW_PLAYER -> handleShowPlayer()
+            var handled = false
-                Intent.ACTION_VIEW -> handleViewIntent()
+            when (intent.action) {
-                Keys.ACTION_START -> handleStartPlayer()
+                Keys.ACTION_SHOW_PLAYER -> {
+                    handleShowPlayer()
+                    handled = true
+                }
+                Intent.ACTION_VIEW -> {
+                    handleViewIntent()
+                    handled = true
+                }
+                Keys.ACTION_START -> {
+                    handled = handleStartPlayer()
                 }
             }
+            if (handled) {
                 // clear intent action to prevent double calls
-        (activity as Activity).intent.action = ""
+                intent.action = ""
+            }
+        }
     }
 
 
     /* Handles ACTION_SHOW_PLAYER request from notification */
     private fun handleShowPlayer() {
         Log.i(TAG, "Tap on notification registered.")
-        // todo implement
+        layout.showPlayer(requireActivity())
     }
 
 
@@ -602,16 +623,18 @@ class PlayerFragment : Fragment(),
                 val scheme: String = intentUri.scheme ?: String()
                 // CASE: intent is a web link
                 if (scheme.startsWith("http")) {
-                    Log.i(TAG, "Transistor was started to handle a web link.")
+                    Log.i(TAG, "Radio was started to handle a web link.")
                     stationList.addAll(CollectionHelper.createStationsFromUrl(intentUri.toString()))
                 }
                 // CASE: intent is a local file
                 else if (scheme.startsWith("content")) {
-                    Log.i(TAG, "Transistor was started to handle a local audio playlist.")
+                    Log.i(TAG, "Radio was started to handle a local audio playlist.")
                     stationList.addAll(CollectionHelper.createStationListFromContentUri(activity as Context, intentUri))
                 }
                 withContext(Main) {
                     if (stationList.isNotEmpty()) {
+                        // stop playback when adding a new station via intent
+                        controller?.stop()
                         AddStationDialog(activity as Activity, stationList, this@PlayerFragment as AddStationDialog.AddStationDialogListener).show()
                     } else {
                         // invalid address
@@ -624,17 +647,30 @@ class PlayerFragment : Fragment(),
 
 
     /* Handles START_PLAYER_SERVICE request from App Shortcut */
-    private fun handleStartPlayer() {
+    private fun handleStartPlayer(): Boolean {
+        if (controller == null || collection.stations.isEmpty()) {
+            return false
+        }
         val intent: Intent = (activity as Activity).intent
         if (intent.hasExtra(Keys.EXTRA_START_LAST_PLAYED_STATION)) {
-            controller?.play(activity as Context, CollectionHelper.getStation(collection, playerState.stationUuid))
+            val station = CollectionHelper.getStation(collection, playerState.stationUuid)
+            if (station.isValid()) {
+                controller?.play(activity as Context, station)
+                return true
+            }
         } else if (intent.hasExtra(Keys.EXTRA_STATION_UUID)) {
             val uuid: String = intent.getStringExtra(Keys.EXTRA_STATION_UUID) ?: String()
-            controller?.play(activity as Context, CollectionHelper.getStation(collection, uuid))
+            val station = CollectionHelper.getStation(collection, uuid)
+            if (station.isValid()) {
+                controller?.play(activity as Context, station)
+                return true
+            }
         } else if (intent.hasExtra(Keys.EXTRA_STREAM_URI)) {
             val streamUri: String = intent.getStringExtra(Keys.EXTRA_STREAM_URI) ?: String()
             controller?.playStreamDirectly(streamUri)
+            return true
         }
+        return false
     }
 
 
@@ -650,16 +686,16 @@ class PlayerFragment : Fragment(),
         collectionViewModel.collectionLiveData.observe(this) {
             // update collection
             collection = it
-////            // updates current station in player views
+            // updates current station in player views
-////            playerState = PreferencesHelper.loadPlayerState()
+            playerState = PreferencesHelper.loadPlayerState()
-//            // get station
+            // get station
-//            val station: Station = CollectionHelper.getStation(collection, playerState.stationUuid)
+            val station: Station = CollectionHelper.getStation(collection, playerState.stationUuid)
-//            // update player views
+            // update player views
-//            layout.updatePlayerViews(activity as Context, station, playerState.isPlaying)
+            layout.updatePlayerViews(activity as Context, station, playerState.isPlaying)
-////            // handle start intent
+            // handle start intent
-////            handleStartIntent()
+            handleStartIntent()
-////            // handle navigation arguments
+            // handle navigation arguments
-////            handleNavigationArguments()
+            handleNavigationArguments()
         }
         collectionViewModel.collectionSizeLiveData.observe(this) {
             // size of collection changed
@@ -754,6 +790,7 @@ class PlayerFragment : Fragment(),
                 layout.showBufferingIndicator(buffering = false)
             } else {
                 // playback is paused or stopped
+                layout.updateSleepTimer(activity as Context, 0L)
                 // check if buffering (playback is not active but playWhenReady is true)
                 if (controller?.playWhenReady == true) {
                     // playback is buffering, show the buffering indicator
@@ -783,7 +820,7 @@ class PlayerFragment : Fragment(),
 
 
     /*
-     * Check for update on github
+     * Check for update on GitHub
      */
     private fun checkForUpdates() {
         val url = getString(R.string.snackbar_github_update_check_url)
@@ -801,7 +838,7 @@ class PlayerFragment : Fragment(),
                         .setAction(R.string.snackbar_show) {
                             val releaseurl = getString(R.string.snackbar_url_app_home_page)
                             val i = Intent(Intent.ACTION_VIEW)
-                            i.data = Uri.parse(releaseurl)
+                            i.data = releaseurl.toUri()
                             // Not sure that does anything
                             i.putExtra("SOURCE", "SELF")
                             startActivity(i)
@@ -820,9 +857,4 @@ class PlayerFragment : Fragment(),
         request.tag = TAG
         queue.add(request)
     }
-
-    /*
-     * End of declaration
-     */
 }
-

app/src/main/java/com/michatec/radio/PlayerService.kt

@@ -1,17 +1,3 @@
-/*
- * PlayerService.kt
- * Implements the PlayerService class
- * PlayerService is Radio's foreground service that plays radio station audio
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio
 
 import android.app.PendingIntent
@@ -24,12 +10,16 @@ import android.os.CountDownTimer
 import android.util.Log
 import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import androidx.media.MediaBrowserServiceCompat.BrowserRoot.EXTRA_RECENT
+import androidx.media3.cast.CastPlayer
 import androidx.media3.common.*
 import androidx.media3.common.util.UnstableApi
 import androidx.media3.datasource.HttpDataSource
 import androidx.media3.exoplayer.DefaultLoadControl
+import androidx.media3.exoplayer.DefaultRenderersFactory
 import androidx.media3.exoplayer.ExoPlayer
 import androidx.media3.exoplayer.analytics.AnalyticsListener
+import androidx.media3.exoplayer.audio.AudioSink
+import androidx.media3.exoplayer.audio.DefaultAudioSink
 import androidx.media3.exoplayer.source.DefaultMediaSourceFactory
 import androidx.media3.exoplayer.upstream.DefaultAllocator
 import androidx.media3.exoplayer.upstream.DefaultLoadErrorHandlingPolicy
@@ -39,10 +29,7 @@ import com.google.common.collect.ImmutableList
 import com.google.common.util.concurrent.Futures
 import com.google.common.util.concurrent.ListenableFuture
 import com.michatec.radio.core.Collection
-import com.michatec.radio.helpers.AudioHelper
+import com.michatec.radio.helpers.*
-import com.michatec.radio.helpers.CollectionHelper
-import com.michatec.radio.helpers.FileHelper
-import com.michatec.radio.helpers.PreferencesHelper
 import kotlinx.coroutines.*
 import kotlinx.coroutines.Dispatchers.Main
 import java.util.*
@@ -52,13 +39,15 @@ import java.util.*
  * PlayerService class
  */
 @UnstableApi
-class PlayerService : MediaLibraryService() {
+class PlayerService : MediaLibraryService(), SharedPreferences.OnSharedPreferenceChangeListener {
 
     /* Define log tag */
     private val TAG: String = PlayerService::class.java.simpleName
 
     /* Main class variables */
     private lateinit var player: Player
+    private lateinit var exoPlayer: ExoPlayer
+    private lateinit var castPlayer: CastPlayer
     private lateinit var mediaLibrarySession: MediaLibrarySession
     private lateinit var sleepTimer: CountDownTimer
     var sleepTimerTimeRemaining: Long = 0L
@@ -71,6 +60,9 @@ class PlayerService : MediaLibraryService() {
     private var playLastStation: Boolean = false
     private var manuallyCancelledSleepTimer = false
     
+    // Native Audio Processor instance
+    private val nativeAudioProcessor = NativeAudioProcessor()
+
 
     /* Overrides onCreate from Service */
     override fun onCreate() {
@@ -90,15 +82,25 @@ class PlayerService : MediaLibraryService() {
         setMediaNotificationProvider(notificationProvider)
         // fetch the metadata history
         metadataHistory = PreferencesHelper.loadMetadataHistory()
+        
+        // register preference change listener
+        PreferencesHelper.registerPreferenceChangeListener(this)
+        // apply initial audio effects
+        applyAudioEffects()
     }
 
 
     /* Overrides onDestroy from Service */
     override fun onDestroy() {
-        // player.removeAnalyticsListener(analyticsListener)
+        // Reset playing state in preferences
+        PreferencesHelper.saveIsPlaying(false)
         player.removeListener(playerListener)
         player.release()
+        exoPlayer.release()
+        castPlayer.release()
         mediaLibrarySession.release()
+        // unregister preference change listener
+        PreferencesHelper.unregisterPreferenceChangeListener(this)
         super.onDestroy()
     }
 
@@ -119,8 +121,26 @@ class PlayerService : MediaLibraryService() {
 
     /* Initializes the ExoPlayer */
     private fun initializePlayer() {
-        val exoPlayer: ExoPlayer = ExoPlayer.Builder(this).apply {
+        val audioAttributes = AudioAttributes.Builder()
-            setAudioAttributes(AudioAttributes.DEFAULT, true)
+            .setContentType(C.AUDIO_CONTENT_TYPE_MUSIC)
+            .setUsage(C.USAGE_MEDIA)
+            .build()
+
+        // Create a RenderersFactory that injects the NativeAudioProcessor
+        val renderersFactory = object : DefaultRenderersFactory(this) {
+            override fun buildAudioSink(
+                context: Context,
+                enableFloatOutput: Boolean,
+                enableAudioTrackPlaybackParams: Boolean
+            ): AudioSink? {
+                return DefaultAudioSink.Builder(context)
+                    .setAudioProcessors(arrayOf(nativeAudioProcessor))
+                    .build()
+            }
+        }
+
+        exoPlayer = ExoPlayer.Builder(this, renderersFactory).apply {
+            setAudioAttributes(audioAttributes, true)
             setHandleAudioBecomingNoisy(true)
             setLoadControl(createDefaultLoadControl(bufferSizeMultiplier))
             setMediaSourceFactory(
@@ -132,8 +152,12 @@ class PlayerService : MediaLibraryService() {
         exoPlayer.addAnalyticsListener(analyticsListener)
         exoPlayer.addListener(playerListener)
 
-        // manually add seek to next and seek to previous since headphones issue them and they are translated to next and previous station
+        // Initialize CastPlayer
-        player = object : ForwardingPlayer(exoPlayer) {
+        castPlayer = CastPlayer.Builder(this).setLocalPlayer(exoPlayer).build()
+
+        // manually add seek to next and seek to previous since headphones issue them, and they are translated to next and previous station
+        // IMPORTANT: Use castPlayer here instead of exoPlayer so the session controls both local and remote playback
+        player = object : ForwardingPlayer(castPlayer) {
             override fun getAvailableCommands(): Player.Commands {
                 return super.getAvailableCommands().buildUpon().add(COMMAND_SEEK_TO_NEXT)
                     .add(COMMAND_SEEK_TO_PREVIOUS).build()
@@ -147,6 +171,7 @@ class PlayerService : MediaLibraryService() {
                 return C.TIME_UNSET // this will hide progress bar for HLS stations in the notification
             }
         }
+        player.addListener(playerListener)
     }
 
 
@@ -210,12 +235,9 @@ class PlayerService : MediaLibraryService() {
     /* Cancels sleep timer */
     private fun cancelSleepTimer() {
         if (this::sleepTimer.isInitialized) {
-            if (manuallyCancelledSleepTimer) {
-                sleepTimerTimeRemaining = 0L
             sleepTimer.cancel()
         }
-            manuallyCancelledSleepTimer = false
+        sleepTimerTimeRemaining = 0L
-        }
         // store timer state
         PreferencesHelper.saveSleepTimerRunning(isRunning = false)
     }
@@ -258,11 +280,69 @@ class PlayerService : MediaLibraryService() {
                 async(Dispatchers.Default) { FileHelper.readCollectionSuspended(context) }
             // wait for result and update collection
             collection = deferred.await()
-//            // special case: trigger metadata view update for stations that have no metadata
+        }
-//            if (player.isPlaying && station.name == getCurrentMetadata()) {
+    }
-//                station = CollectionHelper.getStation(collection, station.uuid)
+
-//                updateMetadata(null)
+
-//            }
+    /* Applies audio effects based on preferences */
+    private fun applyAudioEffects() {
+        val selectedPreset = PreferencesHelper.loadSelectedPreset()
+        if (selectedPreset.isNotEmpty()) {
+            applyPreset(selectedPreset)
+        } else {
+            // Apply manual settings
+            nativeAudioProcessor.enableBassBoost(PreferencesHelper.loadBassBoost())
+            nativeAudioProcessor.setReverb(PreferencesHelper.loadReverb())
+            nativeAudioProcessor.enableDrc(PreferencesHelper.loadDrcEnabled())
+            nativeAudioProcessor.setWidth(1f)
+            // Apply all 10 EQ bands
+            val eqGains = FloatArray(10)
+            for (i in 0 until 10) {
+                eqGains[i] = PreferencesHelper.loadEqBand(i).toFloat()
+            }
+            nativeAudioProcessor.setEqAll(eqGains)
+        }
+    }
+
+    /* Applies a saved preset */
+    private fun applyPreset(presetName: String) {
+        when (presetName) {
+            getString(R.string.pref_preset_rock) -> nativeAudioProcessor.setPresetRock()
+            getString(R.string.pref_preset_pop) -> nativeAudioProcessor.setPresetPop()
+            getString(R.string.pref_preset_jazz) -> nativeAudioProcessor.setPresetJazz()
+            getString(R.string.pref_preset_flat) -> nativeAudioProcessor.setPresetFlat()
+            else -> {
+                // Custom preset - load from preferences
+                nativeAudioProcessor.enableDrc(PreferencesHelper.loadPresetDrc())
+                nativeAudioProcessor.setReverb(PreferencesHelper.loadPresetReverb())
+                nativeAudioProcessor.setWidth(PreferencesHelper.loadPresetStereoWidth())
+                nativeAudioProcessor.enableBassBoost(PreferencesHelper.loadPresetBassBoost())
+                val eqGains = FloatArray(10)
+                for (i in 0 until 10) {
+                    eqGains[i] = PreferencesHelper.loadPresetEqBand(i).toFloat()
+                }
+                nativeAudioProcessor.setEqAll(eqGains)
+            }
+        }
+    }
+
+    /* Overrides onSharedPreferenceChanged from SharedPreferences.OnSharedPreferenceChangeListener */
+    override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
+        when (key) {
+            Keys.PREF_BASS_BOOST, Keys.PREF_REVERB, Keys.PREF_DRC,
+            Keys.PREF_EQ_LOW, Keys.PREF_EQ_MID, Keys.PREF_EQ_HIGH,
+            Keys.PREF_EQ_BAND_1, Keys.PREF_EQ_BAND_2, Keys.PREF_EQ_BAND_3,
+            Keys.PREF_EQ_BAND_4, Keys.PREF_EQ_BAND_5, Keys.PREF_EQ_BAND_6,
+            Keys.PREF_EQ_BAND_7,
+            Keys.PREF_PRESET_SELECTED,
+            Keys.PREF_PRESET_EQ_BAND_0, Keys.PREF_PRESET_EQ_BAND_1, Keys.PREF_PRESET_EQ_BAND_2,
+            Keys.PREF_PRESET_EQ_BAND_3, Keys.PREF_PRESET_EQ_BAND_4, Keys.PREF_PRESET_EQ_BAND_5,
+            Keys.PREF_PRESET_EQ_BAND_6, Keys.PREF_PRESET_EQ_BAND_7, Keys.PREF_PRESET_EQ_BAND_8,
+            Keys.PREF_PRESET_EQ_BAND_9,
+            Keys.PREF_PRESET_BASS_BOOST, Keys.PREF_PRESET_REVERB,
+            Keys.PREF_PRESET_DRC, Keys.PREF_PRESET_STEREO_WIDTH -> {
+                applyAudioEffects()
+            }
         }
     }
 
@@ -280,19 +360,8 @@ class PlayerService : MediaLibraryService() {
             val updatedMediaItems: List<MediaItem> =
                 mediaItems.map { mediaItem ->
                     CollectionHelper.getItem(this@PlayerService, collection, mediaItem.mediaId)
-//                    if (mediaItem.requestMetadata.searchQuery != null)
-//                        getMediaItemFromSearchQuery(mediaItem.requestMetadata.searchQuery!!)
-//                    else MediaItemTree.getItem(mediaItem.mediaId) ?: mediaItem
                 }
             return Futures.immediateFuture(updatedMediaItems)
-
-
-//            val updatedMediaItems = mediaItems.map { mediaItem ->
-//                mediaItem.buildUpon().apply {
-//                    setUri(mediaItem.requestMetadata.mediaUri)
-//                }.build()
-//            }
-//            return Futures.immediateFuture(updatedMediaItems)
         }
 
 
@@ -300,13 +369,13 @@ class PlayerService : MediaLibraryService() {
             session: MediaSession,
             controller: MediaSession.ControllerInfo
         ): MediaSession.ConnectionResult {
-            // add custom commands
             val connectionResult: MediaSession.ConnectionResult = super.onConnect(session, controller)
             val builder: SessionCommands.Builder = connectionResult.availableSessionCommands.buildUpon()
             builder.add(SessionCommand(Keys.CMD_START_SLEEP_TIMER, Bundle.EMPTY))
             builder.add(SessionCommand(Keys.CMD_CANCEL_SLEEP_TIMER, Bundle.EMPTY))
             builder.add(SessionCommand(Keys.CMD_REQUEST_SLEEP_TIMER_REMAINING, Bundle.EMPTY))
             builder.add(SessionCommand(Keys.CMD_REQUEST_METADATA_HISTORY, Bundle.EMPTY))
+            builder.add(SessionCommand(Keys.CMD_GET_VISUALIZER_DATA, Bundle.EMPTY))
             return MediaSession.ConnectionResult.accept(builder.build(), connectionResult.availablePlayerCommands)
         }
 
@@ -393,79 +462,23 @@ class PlayerService : MediaLibraryService() {
                         )
                     )
                 }
+                Keys.CMD_GET_VISUALIZER_DATA -> {
+                    val resultBundle = Bundle()
+                    resultBundle.putFloatArray(
+                        Keys.EXTRA_VISUALIZER_DATA,
+                        nativeAudioProcessor.getVisualizer()
+                    )
+                    return Futures.immediateFuture(
+                        SessionResult(
+                            SessionResult.RESULT_SUCCESS,
+                            resultBundle
+                        )
+                    )
+                }
             }
             return super.onCustomCommand(session, controller, customCommand, args)
         }
 
-        override fun onPlayerCommandRequest(
-            session: MediaSession,
-            controller: MediaSession.ControllerInfo,
-            playerCommand: Int
-        ): Int {
-            // playerCommand = one of COMMAND_PLAY_PAUSE, COMMAND_PREPARE, COMMAND_STOP, COMMAND_SEEK_TO_DEFAULT_POSITION, COMMAND_SEEK_IN_CURRENT_MEDIA_ITEM, COMMAND_SEEK_TO_PREVIOUS_MEDIA_ITEM, COMMAND_SEEK_TO_PREVIOUS, COMMAND_SEEK_TO_NEXT_MEDIA_ITEM, COMMAND_SEEK_TO_NEXT, COMMAND_SEEK_TO_MEDIA_ITEM, COMMAND_SEEK_BACK, COMMAND_SEEK_FORWARD, COMMAND_SET_SPEED_AND_PITCH, COMMAND_SET_SHUFFLE_MODE, COMMAND_SET_REPEAT_MODE, COMMAND_GET_CURRENT_MEDIA_ITEM, COMMAND_GET_TIMELINE, COMMAND_GET_MEDIA_ITEMS_METADATA, COMMAND_SET_MEDIA_ITEMS_METADATA, COMMAND_CHANGE_MEDIA_ITEMS, COMMAND_GET_AUDIO_ATTRIBUTES, COMMAND_GET_VOLUME, COMMAND_GET_DEVICE_VOLUME, COMMAND_SET_VOLUME, COMMAND_SET_DEVICE_VOLUME, COMMAND_ADJUST_DEVICE_VOLUME, COMMAND_SET_VIDEO_SURFACE, COMMAND_GET_TEXT, COMMAND_SET_TRACK_SELECTION_PARAMETERS or COMMAND_GET_TRACK_INFOS. */
-            // emulate headphone buttons
-            // start/pause: adb shell input keyevent 85
-            // next: adb shell input keyevent 87
-            // prev: adb shell input keyevent 88
-            when (playerCommand) {
-                Player.COMMAND_SEEK_TO_NEXT -> {
-                    player.addMediaItem(
-                        CollectionHelper.getNextMediaItem(
-                            this@PlayerService,
-                            collection,
-                            player.currentMediaItem?.mediaId ?: String()
-                        )
-                    )
-                    player.prepare()
-                    player.play()
-                    return SessionResult.RESULT_SUCCESS
-                }
-                Player.COMMAND_SEEK_TO_PREVIOUS -> {
-                    player.addMediaItem(
-                        CollectionHelper.getPreviousMediaItem(
-                            this@PlayerService,
-                            collection,
-                            player.currentMediaItem?.mediaId ?: String()
-                        )
-                    )
-                    player.prepare()
-                    player.play()
-                    return SessionResult.RESULT_SUCCESS
-                }
-                Player.COMMAND_PREPARE -> {
-                    return if (playLastStation) {
-                        // special case: system requested media resumption (see also onGetLibraryRoot)
-                        player.addMediaItem(CollectionHelper.getRecent(this@PlayerService, collection))
-                        player.prepare()
-                        playLastStation = false
-                        SessionResult.RESULT_SUCCESS
-                    } else {
-                        super.onPlayerCommandRequest(session, controller, playerCommand)
-                    }
-                }
-                Player.COMMAND_PLAY_PAUSE -> {
-                    return if (player.isPlaying) {
-                        super.onPlayerCommandRequest(session, controller, playerCommand)
-                    } else {
-                        // seek to the start of the "live window"
-                        player.seekTo(0)
-                        SessionResult.RESULT_SUCCESS
-                    }
-                }
-//                Player.COMMAND_PLAY_PAUSE -> {
-//                    // override pause with stop, to prevent unnecessary buffering
-//                    if (player.isPlaying) {
-//                        player.stop()
-//                        return SessionResult.RESULT_INFO_SKIPPED
-//                    } else {
-//                       return super.onPlayerCommandRequest(session, controller, playerCommand)
-//                    }
-//                }
-                else -> {
-                    return super.onPlayerCommandRequest(session, controller, playerCommand)
-                }
-            }
-        }
     }
 
 
@@ -480,21 +493,21 @@ class PlayerService : MediaLibraryService() {
             customLayout: ImmutableList<CommandButton>,
             showPauseButton: Boolean
         ): ImmutableList<CommandButton> {
-            val seekToPreviousCommandButton = CommandButton.Builder().apply {
+            val seekToPreviousCommandButton = CommandButton.Builder(CommandButton.ICON_UNDEFINED)
-                setPlayerCommand(Player.COMMAND_SEEK_TO_PREVIOUS)
+                .setPlayerCommand(Player.COMMAND_SEEK_TO_PREVIOUS)
-                setIconResId(R.drawable.ic_notification_skip_to_previous_36dp)
+                .setCustomIconResId(R.drawable.ic_notification_skip_to_previous_36dp)
-                setEnabled(true)
+                .setEnabled(true)
-            }.build()
+                .build()
-            val playCommandButton = CommandButton.Builder().apply {
+            val playCommandButton = CommandButton.Builder(CommandButton.ICON_UNDEFINED)
-                setPlayerCommand(Player.COMMAND_PLAY_PAUSE)
+                .setPlayerCommand(Player.COMMAND_PLAY_PAUSE)
-                setIconResId(if (player.isPlaying) R.drawable.ic_notification_stop_36dp else R.drawable.ic_notification_play_36dp)
+                .setCustomIconResId(if (player.isPlaying) R.drawable.ic_notification_stop_36dp else R.drawable.ic_notification_play_36dp)
-                setEnabled(true)
+                .setEnabled(true)
-            }.build()
+                .build()
-            val seekToNextCommandButton = CommandButton.Builder().apply {
+            val seekToNextCommandButton = CommandButton.Builder(CommandButton.ICON_UNDEFINED)
-                setPlayerCommand(Player.COMMAND_SEEK_TO_NEXT)
+                .setPlayerCommand(Player.COMMAND_SEEK_TO_NEXT)
-                setIconResId(R.drawable.ic_notification_skip_to_next_36dp)
+                .setCustomIconResId(R.drawable.ic_notification_skip_to_next_36dp)
-                setEnabled(true)
+                .setEnabled(true)
-            }.build()
+                .build()
             val commandButtons: MutableList<CommandButton> = mutableListOf(
                 seekToPreviousCommandButton,
                 playCommandButton,
@@ -526,37 +539,24 @@ class PlayerService : MediaLibraryService() {
                 currentMediaId,
                 isPlaying
             )
-            //updatePlayerState(station, playbackState)
 
-            if (isPlaying) {
+            if (!isPlaying) {
-                // playback is active
-            } else {
                 // cancel sleep timer
                 cancelSleepTimer()
                 // reset metadata
                 updateMetadata()
 
-                // playback is not active
+                // Check playback state to decide whether to stop the service
-                // Not playing because playback is paused, ended, suppressed, or the player
-                // is buffering, stopped or failed. Check player.getPlayWhenReady,
-                // player.getPlaybackState, player.getPlaybackSuppressionReason and
-                // player.getPlaybackError for details.
                 when (player.playbackState) {
-                    // player is able to immediately play from its current position
+                    Player.STATE_ENDED, Player.STATE_IDLE -> {
+                        stopSelf()
+                    }
                     Player.STATE_READY -> {
-                        // todo
+                        // Playback is paused. For radio, we can stop the service to remove the notification.
+                        stopSelf()
                     }
-                    // buffering - data needs to be loaded
                     Player.STATE_BUFFERING -> {
-                        // todo
+                        // DO NOT stop the service while buffering (especially important for Cast)
-                    }
-                    // player finished playing all media
-                    Player.STATE_ENDED -> {
-                        // todo
-                    }
-                    // initial state or player is stopped or playback failed
-                    Player.STATE_IDLE -> {
-                        // todo
                     }
                 }
             }
@@ -565,18 +565,9 @@ class PlayerService : MediaLibraryService() {
         override fun onPlayWhenReadyChanged(playWhenReady: Boolean, reason: Int) {
             super.onPlayWhenReadyChanged(playWhenReady, reason)
             if (!playWhenReady) {
-                when (reason) {
+                // Only stop if not buffering and not ready to play (i.e. truly stopped/paused)
-                    Player.PLAY_WHEN_READY_CHANGE_REASON_END_OF_MEDIA_ITEM -> {
+                if (player.playbackState != Player.STATE_BUFFERING) {
-                        // playback reached end: stop / end playback
+                    stopSelf()
-                    }
-                    else -> {
-                        // playback has been paused by user or OS: update media session and save state
-                        // PLAY_WHEN_READY_CHANGE_REASON_USER_REQUEST or
-                        // PLAY_WHEN_READY_CHANGE_REASON_AUDIO_FOCUS_LOSS or
-                        // PLAY_WHEN_READY_CHANGE_REASON_AUDIO_BECOMING_NOISY or
-                        // PLAY_WHEN_READY_CHANGE_REASON_REMOTE
-                        // handlePlaybackChange(PlaybackStateCompat.STATE_PAUSED)
-                    }
                 }
             }
         }
@@ -585,7 +576,10 @@ class PlayerService : MediaLibraryService() {
         override fun onPlayerError(error: PlaybackException) {
             super.onPlayerError(error)
             Log.d(TAG, "PlayerError occurred: ${error.errorCodeName}")
-            // todo: test if playback needs to be restarted
+            if (error.errorCode == PlaybackException.ERROR_CODE_IO_NETWORK_CONNECTION_FAILED || error.errorCode == PlaybackException.ERROR_CODE_IO_NETWORK_CONNECTION_TIMEOUT) {
+                player.prepare()
+                player.play()
+            }
         }
 
 
@@ -598,17 +592,13 @@ class PlayerService : MediaLibraryService() {
 
 
     /*
-     * Custom LoadErrorHandlingPolicy that network drop outs
+     * Custom LoadErrorHandlingPolicy that network drop-outs
      */
     private val loadErrorHandlingPolicy: DefaultLoadErrorHandlingPolicy = object: DefaultLoadErrorHandlingPolicy()  {
         override fun getRetryDelayMsFor(loadErrorInfo: LoadErrorHandlingPolicy.LoadErrorInfo): Long {
             // try to reconnect every 5 seconds - up to 20 times
             if (loadErrorInfo.errorCount <= Keys.DEFAULT_MAX_RECONNECTION_COUNT && loadErrorInfo.exception is HttpDataSource.HttpDataSourceException) {
                 return Keys.RECONNECTION_WAIT_INTERVAL
-//            } else {
-//                CoroutineScope(Main).launch {
-//                    player.stop()
-//                }
             }
             return C.TIME_UNSET
         }
@@ -636,22 +626,6 @@ class PlayerService : MediaLibraryService() {
     }
 
 
-    /*
-    * Defines the listener for changes in shared preferences
-    */
-    private val sharedPreferenceChangeListener =
-        SharedPreferences.OnSharedPreferenceChangeListener { _, key ->
-            when (key) {
-                Keys.PREF_LARGE_BUFFER_SIZE -> {
-                    bufferSizeMultiplier = PreferencesHelper.loadBufferSizeMultiplier()
-                    if (!player.isPlaying && !player.isLoading) {
-                        initializePlayer()
-                    }
-                }
-            }
-        }
-
-
     /*
      * Custom AnalyticsListener that enables AudioFX equalizer integration
      */
@@ -667,7 +641,6 @@ class PlayerService : MediaLibraryService() {
             intent.putExtra(AudioEffect.EXTRA_PACKAGE_NAME, packageName)
             intent.putExtra(AudioEffect.EXTRA_CONTENT_TYPE, AudioEffect.CONTENT_TYPE_MUSIC)
             sendBroadcast(intent)
-            // note: remember to broadcast AudioEffect.ACTION_CLOSE_AUDIO_EFFECT_CONTROL_SESSION, when not needed anymore
         }
     }
 }

app/src/main/java/com/michatec/radio/Radio.kt

@@ -1,17 +1,3 @@
-/*
- * Radio.kt
- * Implements the Radio class
- * Radio is the base Application class that sets up day and night theme
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio
 
 import android.app.Application
@@ -25,8 +11,6 @@ import com.michatec.radio.helpers.PreferencesHelper.initPreferences
  */
 class Radio : Application() {
 
-    /* Define log tag */
-    private val TAG: String = Radio::class.java.simpleName
 
     /* Implements onCreate */
     override fun onCreate() {
@@ -36,10 +20,4 @@ class Radio : Application() {
         AppThemeHelper.setTheme(PreferencesHelper.loadThemeSelection())
     }
 
-
-    /* Implements onTerminate */
-    override fun onTerminate() {
-        super.onTerminate()
-    }
-
 }

app/src/main/java/com/michatec/radio/SettingsFragment.kt

@@ -1,17 +1,3 @@
-/*
- * SettingsFragment.kt
- * Implements the SettingsFragment fragment
- * A SettingsFragment displays the user accessible settings of the app
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio
 
 import android.app.Activity
@@ -20,24 +6,21 @@ import android.content.ClipboardManager
 import android.content.Context
 import android.content.Intent
 import android.net.Uri
-import android.os.Build
 import android.os.Bundle
 import android.util.Log
 import android.view.View
 import androidx.activity.result.ActivityResult
 import androidx.activity.result.contract.ActivityResultContracts.StartActivityForResult
 import androidx.appcompat.app.AppCompatActivity
-import androidx.appcompat.app.AppCompatDelegate
-import androidx.core.content.ContextCompat
 import androidx.core.net.toUri
-import androidx.core.os.bundleOf
 import androidx.navigation.fragment.findNavController
 import androidx.preference.*
 import com.google.android.material.snackbar.Snackbar
 import com.michatec.radio.dialogs.ErrorDialog
+import com.michatec.radio.dialogs.PresetSelectionDialog
+import com.michatec.radio.dialogs.ThemeSelectionDialog
 import com.michatec.radio.dialogs.YesNoDialog
 import com.michatec.radio.helpers.*
-import com.michatec.radio.helpers.AppThemeHelper.getColor
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.launch
@@ -48,7 +31,7 @@ import java.util.*
 /*
  * SettingsFragment class
  */
-class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogListener {
+class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogListener, ThemeSelectionDialog.ThemeSelectionDialogListener, PresetSelectionDialog.PresetSelectionDialogListener {
 
 
     /* Define log tag */
@@ -62,20 +45,6 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
         (activity as AppCompatActivity).supportActionBar?.show()
         (activity as AppCompatActivity).supportActionBar?.setDisplayHomeAsUpEnabled(true)
         (activity as AppCompatActivity).supportActionBar?.title = getString(R.string.fragment_settings_title)
-
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            // above Android Oreo
-            (activity as AppCompatActivity).window.navigationBarColor = getColor(requireContext(), android.R.attr.colorBackground)
-        } else {
-            val nightMode = AppCompatDelegate.getDefaultNightMode()
-            if (nightMode == AppCompatDelegate.MODE_NIGHT_YES) {
-                // night mode is active, set navigation bar color to a suitable color for night mode
-                (activity as AppCompatActivity).window.navigationBarColor = getColor(requireContext(), android.R.attr.colorBackground)
-            } else {
-                // night mode is not active, set navigation bar color to a suitable color for day mode
-                (activity as AppCompatActivity).window.navigationBarColor = ContextCompat.getColor(requireContext(), android.R.color.black)
-            }
-        }
     }
 
     /* Overrides onCreatePreferences from PreferenceFragmentCompat */
@@ -84,34 +53,21 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
         val context = preferenceManager.context
         val screen = preferenceManager.createPreferenceScreen(context)
 
+        // Load current preset once
+        val currentPreset = PreferencesHelper.loadSelectedPreset()
+
         // set up "App Theme" preference
-        val preferenceThemeSelection = ListPreference(activity as Context)
+        val preferenceThemeSelection = Preference(activity as Context)
         preferenceThemeSelection.title = getString(R.string.pref_theme_selection_title)
         preferenceThemeSelection.setIcon(R.drawable.ic_brush_24dp)
         preferenceThemeSelection.key = Keys.PREF_THEME_SELECTION
         preferenceThemeSelection.summary = "${getString(R.string.pref_theme_selection_summary)} ${
             AppThemeHelper.getCurrentTheme(activity as Context)
         }"
-        preferenceThemeSelection.entries = arrayOf(
+        preferenceThemeSelection.setOnPreferenceClickListener {
-            getString(R.string.pref_theme_selection_mode_device_default),
+            // show theme selection dialog
-            getString(R.string.pref_theme_selection_mode_light),
+            ThemeSelectionDialog(this).show(activity as Context)
-            getString(R.string.pref_theme_selection_mode_dark)
+            return@setOnPreferenceClickListener true
-        )
-        preferenceThemeSelection.entryValues = arrayOf(
-            Keys.STATE_THEME_FOLLOW_SYSTEM,
-            Keys.STATE_THEME_LIGHT_MODE,
-            Keys.STATE_THEME_DARK_MODE
-        )
-        preferenceThemeSelection.setDefaultValue(Keys.STATE_THEME_FOLLOW_SYSTEM)
-        preferenceThemeSelection.setOnPreferenceChangeListener { preference, newValue ->
-            if (preference is ListPreference) {
-                val index: Int = preference.entryValues.indexOf(newValue)
-                preferenceThemeSelection.summary =
-                    "${getString(R.string.pref_theme_selection_summary)} ${preference.entries[index]}"
-                return@setOnPreferenceChangeListener true
-            } else {
-                return@setOnPreferenceChangeListener false
-            }
         }
 
         // set up "Update Station Images" preference
@@ -130,17 +86,21 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
             return@setOnPreferenceClickListener true
         }
 
-
+        // set up "Update Stations" preference
-//        // set up "Update Stations" preference
+        val preferenceUpdateCollection = Preference(activity as Context)
-//        val preferenceUpdateCollection: Preference = Preference(activity as Context)
+        preferenceUpdateCollection.title = getString(R.string.pref_update_collection_title)
-//        preferenceUpdateCollection.title = getString(R.string.pref_update_collection_title)
+        preferenceUpdateCollection.setIcon(R.drawable.ic_refresh_24dp)
-//        preferenceUpdateCollection.setIcon(R.drawable.ic_refresh_24dp)
+        preferenceUpdateCollection.summary = getString(R.string.pref_update_collection_summary)
-//        preferenceUpdateCollection.summary = getString(R.string.pref_update_collection_summary)
+        preferenceUpdateCollection.setOnPreferenceClickListener {
-//        preferenceUpdateCollection.setOnPreferenceClickListener {
+            // show dialog
-//            // show dialog
+            YesNoDialog(this).show(
-//            YesNoDialog(this).show(context = activity as Context, type = Keys.DIALOG_UPDATE_COLLECTION, message = R.string.dialog_yes_no_message_update_collection, yesButton = R.string.dialog_yes_no_positive_button_update_collection)
+                context = activity as Context,
-//            return@setOnPreferenceClickListener true
+                type = Keys.DIALOG_UPDATE_COLLECTION,
-//        }
+                message = R.string.dialog_yes_no_message_update_collection,
+                yesButton = R.string.dialog_yes_no_positive_button_update_collection,
+            )
+            return@setOnPreferenceClickListener true
+        }
 
 
         // set up "M3U Export" preference
@@ -204,7 +164,8 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
         preferenceEnableEditingStreamUri.key = Keys.PREF_EDIT_STREAMS_URIS
         preferenceEnableEditingStreamUri.summaryOn = getString(R.string.pref_edit_station_stream_summary_enabled)
         preferenceEnableEditingStreamUri.summaryOff = getString(R.string.pref_edit_station_stream_summary_disabled)
-        preferenceEnableEditingStreamUri.setDefaultValue(PreferencesHelper.loadEditStreamUrisEnabled())
+        preferenceEnableEditingStreamUri.setDefaultValue(PreferencesHelper.loadEditStreamUrisEnabled(context))
+        preferenceEnableEditingStreamUri.isEnabled = PreferencesHelper.loadEditStreamUrisEnabled(context)
 
 
         // set up "Edit Stations" preference
@@ -214,7 +175,7 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
         preferenceEnableEditingGeneral.key = Keys.PREF_EDIT_STATIONS
         preferenceEnableEditingGeneral.summaryOn = getString(R.string.pref_edit_station_summary_enabled)
         preferenceEnableEditingGeneral.summaryOff = getString(R.string.pref_edit_station_summary_disabled)
-        preferenceEnableEditingGeneral.setDefaultValue(PreferencesHelper.loadEditStationsEnabled())
+        preferenceEnableEditingGeneral.setDefaultValue(PreferencesHelper.loadEditStationsEnabled(context))
         preferenceEnableEditingGeneral.setOnPreferenceChangeListener { _, newValue ->
             when (newValue) {
                 true -> {
@@ -228,6 +189,75 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
             return@setOnPreferenceChangeListener true
         }
 
+        // set up "Bass Boost" preference
+        val preferenceBassBoost = MarqueeSwitchPreference(context)
+        preferenceBassBoost.title = getString(R.string.pref_bass_boost_title)
+        preferenceBassBoost.setIcon(R.drawable.ic_music_note_24dp)
+        preferenceBassBoost.key = Keys.PREF_BASS_BOOST
+        preferenceBassBoost.isEnabled = currentPreset.isEmpty()
+        preferenceBassBoost.summary = getString(R.string.pref_bass_boost_summary)
+        preferenceBassBoost.setDefaultValue(false)
+
+        // set up "Reverb" preference
+        val preferenceReverb = MarqueeSwitchPreference(context)
+        preferenceReverb.title = getString(R.string.pref_reverb_title)
+        preferenceReverb.setIcon(R.drawable.ic_music_note_24dp)
+        preferenceReverb.key = Keys.PREF_REVERB
+        preferenceReverb.isEnabled = currentPreset.isEmpty()
+        preferenceReverb.summary = getString(R.string.pref_reverb_summary)
+        preferenceReverb.setDefaultValue(false)
+
+        // set up "DRC" preference
+        val preferenceDrc = MarqueeSwitchPreference(context)
+        preferenceDrc.title = getString(R.string.pref_drc_title)
+        preferenceDrc.setIcon(R.drawable.ic_music_note_24dp)
+        preferenceDrc.key = Keys.PREF_DRC
+        preferenceDrc.isEnabled = currentPreset.isEmpty()
+        preferenceDrc.summary = getString(R.string.pref_drc_summary)
+        preferenceDrc.setDefaultValue(true)
+
+        // set up "Preset Selection" preference
+        val preferencePresetSelection = Preference(context)
+        preferencePresetSelection.title = getString(R.string.pref_preset_selection_title)
+        preferencePresetSelection.setIcon(R.drawable.ic_music_note_24dp)
+        preferencePresetSelection.key = Keys.PREF_PRESET_SELECTED
+        val presetSummary = currentPreset.ifEmpty {
+            getString(R.string.pref_preset_none)
+        }
+        preferencePresetSelection.summary = "${getString(R.string.pref_preset_selection_summary)}: $presetSummary"
+        preferencePresetSelection.setOnPreferenceClickListener {
+            PresetSelectionDialog(this).show(activity as Context)
+            return@setOnPreferenceClickListener true
+        }
+
+        // Initialize EQ control states based on current preset
+        updateEqControlStates()
+
+        // set up "Equalizer" preference entry
+        val preferenceEqualizer = Preference(context)
+        preferenceEqualizer.title = getString(R.string.pref_equalizer_title)
+        preferenceEqualizer.setIcon(R.drawable.ic_music_note_24dp)
+        preferenceEqualizer.key = Keys.PREF_EQUALIZER
+        if (currentPreset.isEmpty()) {
+            preferenceEqualizer.summary = getString(R.string.pref_equalizer_summary)
+            preferenceEqualizer.isEnabled = true
+        } else {
+            preferenceEqualizer.summary = getString(R.string.pref_equalizer_summary_off)
+            preferenceEqualizer.isEnabled = false
+        }
+        preferenceEqualizer.setOnPreferenceClickListener {
+            findNavController().navigate(R.id.action_settings_to_equalizer)
+            return@setOnPreferenceClickListener true
+        }
+
+        val preferenceVisualizer = Preference(context)
+        preferenceVisualizer.title = getString(R.string.pref_visualizer_title)
+        preferenceVisualizer.setIcon(R.drawable.ic_music_note_24dp)
+        preferenceVisualizer.summary = getString(R.string.pref_visualizer_summary)
+        preferenceVisualizer.setOnPreferenceClickListener {
+            findNavController().navigate(R.id.action_settings_to_visualizer)
+            return@setOnPreferenceClickListener true
+        }
 
         // set up "App Version" preference
         val preferenceAppVersion = Preference(context)
@@ -239,10 +269,7 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
             val clip: ClipData = ClipData.newPlainText("simple text", preferenceAppVersion.summary)
             val cm: ClipboardManager = context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
             cm.setPrimaryClip(clip)
-            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) {
-                // since API 33 (TIRAMISU) the OS displays its own notification when content is copied to the clipboard
             Snackbar.make(requireView(), R.string.toastmessage_copied_to_clipboard, Snackbar.LENGTH_LONG).show()
-            }
             return@setOnPreferenceClickListener true
         }
 
@@ -281,54 +308,122 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
         // set preference categories
         val preferenceCategoryGeneral = PreferenceCategory(activity as Context)
         preferenceCategoryGeneral.title = getString(R.string.pref_general_title)
-        preferenceCategoryGeneral.contains(preferenceThemeSelection)
+
+        val preferenceCategoryAudioEffects = PreferenceCategory(context)
+        preferenceCategoryAudioEffects.title = getString(R.string.pref_audio_effects_title)
 
         val preferenceCategoryMaintenance = PreferenceCategory(activity as Context)
         preferenceCategoryMaintenance.title = getString(R.string.pref_maintenance_title)
-        preferenceCategoryMaintenance.contains(preferenceUpdateStationImages)
-//        preferenceCategoryMaintenance.contains(preferenceUpdateCollection)
 
         val preferenceCategoryImportExport = PreferenceCategory(activity as Context)
         preferenceCategoryImportExport.title = getString(R.string.pref_backup_import_export_title)
-        preferenceCategoryImportExport.contains(preferenceM3uExport)
-        preferenceCategoryImportExport.contains(preferencePlsExport)
-        preferenceCategoryImportExport.contains(preferenceBackupCollection)
-        preferenceCategoryImportExport.contains(preferenceRestoreCollection)
 
         val preferenceCategoryAdvanced = PreferenceCategory(activity as Context)
         preferenceCategoryAdvanced.title = getString(R.string.pref_advanced_title)
-        preferenceCategoryAdvanced.contains(preferenceBufferSize)
-        preferenceCategoryAdvanced.contains(preferenceEnableEditingGeneral)
-        preferenceCategoryAdvanced.contains(preferenceEnableEditingStreamUri)
 
         val preferenceCategoryLinks = PreferenceCategory(context)
         preferenceCategoryLinks.title = getString(R.string.pref_links_title)
-        preferenceCategoryLinks.contains(preferenceAppVersion)
-        preferenceCategoryLinks.contains(preferenceGitHub)
 
 
         // setup preference screen
         screen.addPreference(preferenceAppVersion)
-        screen.addPreference(preferenceLicense)
+
         screen.addPreference(preferenceCategoryGeneral)
-        screen.addPreference(preferenceThemeSelection)
+        preferenceCategoryGeneral.addPreference(preferenceThemeSelection)
+
+        screen.addPreference(preferenceCategoryAudioEffects)
+        preferenceCategoryAudioEffects.addPreference(preferenceBassBoost)
+        preferenceCategoryAudioEffects.addPreference(preferenceReverb)
+        preferenceCategoryAudioEffects.addPreference(preferenceDrc)
+        preferenceCategoryAudioEffects.addPreference(preferencePresetSelection)
+        preferenceCategoryAudioEffects.addPreference(preferenceEqualizer)
+        preferenceCategoryAudioEffects.addPreference(preferenceVisualizer)
+
         screen.addPreference(preferenceCategoryMaintenance)
-        screen.addPreference(preferenceUpdateStationImages)
+        preferenceCategoryMaintenance.addPreference(preferenceUpdateStationImages)
-//        screen.addPreference(preferenceUpdateCollection)
+        preferenceCategoryMaintenance.addPreference(preferenceUpdateCollection)
+
         screen.addPreference(preferenceCategoryImportExport)
-        screen.addPreference(preferenceM3uExport)
+        preferenceCategoryImportExport.addPreference(preferenceM3uExport)
-        screen.addPreference(preferencePlsExport)
+        preferenceCategoryImportExport.addPreference(preferencePlsExport)
-        screen.addPreference(preferenceBackupCollection)
+        preferenceCategoryImportExport.addPreference(preferenceBackupCollection)
-        screen.addPreference(preferenceRestoreCollection)
+        preferenceCategoryImportExport.addPreference(preferenceRestoreCollection)
+
         screen.addPreference(preferenceCategoryAdvanced)
-        screen.addPreference(preferenceBufferSize)
+        preferenceCategoryAdvanced.addPreference(preferenceBufferSize)
-        screen.addPreference(preferenceEnableEditingGeneral)
+        preferenceCategoryAdvanced.addPreference(preferenceEnableEditingGeneral)
-        screen.addPreference(preferenceEnableEditingStreamUri)
+        preferenceCategoryAdvanced.addPreference(preferenceEnableEditingStreamUri)
+
         screen.addPreference(preferenceCategoryLinks)
-        screen.addPreference(preferenceGitHub)
+        preferenceCategoryLinks.addPreference(preferenceGitHub)
+        preferenceCategoryLinks.addPreference(preferenceLicense)
+
         preferenceScreen = screen
     }
 
+    /* Overrides onThemeSelectionDialog from ThemeSelectionDialogListener */
+    override fun onThemeSelectionDialog(dialogResult: Boolean, selectedTheme: String) {
+        if (dialogResult) {
+            // update summary
+            val themes = arrayOf(
+                getString(R.string.pref_theme_selection_mode_device_default),
+                getString(R.string.pref_theme_selection_mode_light),
+                getString(R.string.pref_theme_selection_mode_dark)
+            )
+            val themeValues = arrayOf(
+                Keys.STATE_THEME_FOLLOW_SYSTEM,
+                Keys.STATE_THEME_LIGHT_MODE,
+                Keys.STATE_THEME_DARK_MODE
+            )
+            val index = themeValues.indexOf(selectedTheme)
+            val preferenceThemeSelection = findPreference<Preference>(Keys.PREF_THEME_SELECTION)
+            preferenceThemeSelection?.summary = "${getString(R.string.pref_theme_selection_summary)} ${themes[index]}"
+        }
+    }
+
+
+    /* Overrides onPresetSelectionDialog from PresetSelectionDialogListener */
+    override fun onPresetSelectionDialog(dialogResult: Boolean, selectedPreset: String) {
+        if (dialogResult) {
+            // update summary
+            val presetPreference = findPreference<Preference>(Keys.PREF_PRESET_SELECTED)
+            val presetSummary = selectedPreset.ifEmpty {
+                getString(R.string.pref_preset_none)
+            }
+            presetPreference?.summary = "${getString(R.string.pref_preset_selection_summary)}: $presetSummary"
+
+            // Enable/disable manual EQ controls based on preset selection
+            updateEqControlStates()
+        }
+    }
+
+    /* Updates the enabled/disabled state of EQ controls based on preset selection */
+    private fun updateEqControlStates() {
+        val currentPreset = PreferencesHelper.loadSelectedPreset()
+        val isPresetSelected = currentPreset.isNotEmpty()
+
+        // Update Bass Boost
+        findPreference<Preference>(Keys.PREF_BASS_BOOST)?.isEnabled = !isPresetSelected
+
+        // Update Reverb
+        findPreference<Preference>(Keys.PREF_REVERB)?.isEnabled = !isPresetSelected
+
+        // Update DRC
+        findPreference<Preference>(Keys.PREF_DRC)?.isEnabled = !isPresetSelected
+
+        // Update Equalizer with proper key
+        val preferenceEqualizer = findPreference<Preference>(Keys.PREF_EQUALIZER)
+        if (preferenceEqualizer != null) {
+            if (isPresetSelected) {
+                preferenceEqualizer.summary = getString(R.string.pref_equalizer_summary_off)
+                preferenceEqualizer.isEnabled = false
+            } else {
+                preferenceEqualizer.summary = getString(R.string.pref_equalizer_summary)
+                preferenceEqualizer.isEnabled = true
+            }
+        }
+    }
+
 
     /* Overrides onYesNoDialog from YesNoDialogListener */
     override fun onYesNoDialog(
@@ -437,9 +532,9 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
             val sourceUri: Uri? = result.data?.data
             if (sourceUri != null) {
                 // open and import OPML in player fragment
-                val bundle: Bundle = bundleOf(
+                val bundle = Bundle().apply {
-                    Keys.ARG_RESTORE_COLLECTION to "$sourceUri"
+                    putString(Keys.ARG_RESTORE_COLLECTION, "$sourceUri")
-                )
+                }
                 this.findNavController().navigate(R.id.player_destination, bundle)
             }
         }
@@ -455,7 +550,9 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
                 Snackbar.LENGTH_LONG
             ).show()
             // update collection in player screen
-            val bundle: Bundle = bundleOf(Keys.ARG_UPDATE_COLLECTION to true)
+            val bundle = Bundle().apply {
+                putBoolean(Keys.ARG_UPDATE_COLLECTION, true)
+            }
             this.findNavController().navigate(R.id.player_destination, bundle)
         } else {
             ErrorDialog().show(
@@ -476,9 +573,9 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
                 Snackbar.LENGTH_LONG
             ).show()
             // update collection in player screen
-            val bundle: Bundle = bundleOf(
+            val bundle = Bundle().apply {
-                Keys.ARG_UPDATE_IMAGES to true
+                putBoolean(Keys.ARG_UPDATE_IMAGES, true)
-            )
+            }
             this.findNavController().navigate(R.id.player_destination, bundle)
         } else {
             ErrorDialog().show(
@@ -512,28 +609,6 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
     }
 
 
-    /* Opens up a file picker to select the save location */
-    private fun openSavePlsDialog() {
-        val intent = Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
-            addCategory(Intent.CATEGORY_OPENABLE)
-            type = Keys.MIME_TYPE_PLS
-
-            val timeStamp: String
-            val dateFormat = SimpleDateFormat("_yyyy-MM-dd'T'HH_mm", Locale.US)
-            timeStamp = dateFormat.format(Date())
-
-            putExtra(Intent.EXTRA_TITLE, "collection$timeStamp.pls")
-        }
-        // file gets saved in the ActivityResult
-        try {
-            requestSavePlsLauncher.launch(intent)
-        } catch (exception: Exception) {
-            Log.e(TAG, "Unable to save PLS.\n$exception")
-            Snackbar.make(requireView(), R.string.toastmessage_install_file_helper, Snackbar.LENGTH_LONG).show()
-        }
-    }
-
-
     /* Opens up a file picker to select the backup location */
     private fun openBackupCollectionDialog() {
         val intent = Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
@@ -568,7 +643,26 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
             requestRestoreCollectionLauncher.launch(intent)
         } catch (exception: Exception) {
             Log.e(TAG, "Unable to open file picker for ZIP.\n$exception")
-            // Toast.makeText(activity as Context, R.string.toast_message_install_file_helper, Toast.LENGTH_LONG).show()
+        }
+    }
+
+    private fun openSavePlsDialog() {
+        val intent = Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
+            addCategory(Intent.CATEGORY_OPENABLE)
+            type = Keys.MIME_TYPE_PLS
+
+            val timeStamp: String
+            val dateFormat = SimpleDateFormat("_yyyy-MM-dd'T'HH_mm", Locale.US)
+            timeStamp = dateFormat.format(Date())
+
+            putExtra(Intent.EXTRA_TITLE, "collection$timeStamp.pls")
+        }
+        // file gets saved in the ActivityResult
+        try {
+            requestSavePlsLauncher.launch(intent)
+        } catch (exception: Exception) {
+            Log.e(TAG, "Unable to save PLS.\n$exception")
+            Snackbar.make(requireView(), R.string.toastmessage_install_file_helper, Snackbar.LENGTH_LONG).show()
         }
     }
 }

app/src/main/java/com/michatec/radio/VisualizerFragment.kt

@@ -0,0 +1,122 @@
+package com.michatec.radio
+
+import android.content.ComponentName
+import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.util.Log
+import android.view.View
+import androidx.annotation.OptIn
+import androidx.appcompat.app.AppCompatActivity
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.session.MediaController
+import androidx.media3.session.SessionToken
+import androidx.preference.PreferenceFragmentCompat
+import com.google.common.util.concurrent.ListenableFuture
+import com.google.common.util.concurrent.MoreExecutors
+import com.michatec.radio.extensions.requestVisualizerData
+import com.michatec.radio.helpers.ExtrasHelper
+
+/*
+ * VisualizerFragment class: Handles audio visualization
+ */
+@OptIn(UnstableApi::class)
+class VisualizerFragment : PreferenceFragmentCompat() {
+
+    private val TAG = "VisualizerFragment"
+    private lateinit var controllerFuture: ListenableFuture<MediaController>
+    private val controller: MediaController?
+        get() = if (this::controllerFuture.isInitialized && controllerFuture.isDone) {
+            try { controllerFuture.get() } catch (_: Exception) { null }
+        } else null
+
+    private var visualizerPref: ExtrasHelper.VisualizerPreference? = null
+    private val handler = Handler(Looper.getMainLooper())
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        (activity as AppCompatActivity).supportActionBar?.title = getString(R.string.pref_visualizer_title)
+        (activity as AppCompatActivity).supportActionBar?.show()
+    }
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        val context = preferenceManager.context
+        val screen = preferenceManager.createPreferenceScreen(context)
+        
+        visualizerPref = ExtrasHelper.VisualizerPreference(context)
+        visualizerPref?.key = "visualizer_key"
+        screen.addPreference(visualizerPref!!)
+
+        preferenceScreen = screen
+    }
+
+    override fun onStart() {
+        super.onStart()
+        initializeController()
+    }
+
+    override fun onStop() {
+        super.onStop()
+        releaseController()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        startPolling()
+    }
+
+    override fun onPause() {
+        super.onPause()
+        stopPolling()
+    }
+
+    private fun initializeController() {
+        controllerFuture = MediaController.Builder(
+            requireContext(),
+            SessionToken(requireContext(), ComponentName(requireContext(), PlayerService::class.java))
+        ).buildAsync()
+        controllerFuture.addListener({
+            Log.d(TAG, "MediaController connected: ${controller != null}")
+        }, MoreExecutors.directExecutor())
+    }
+
+    private fun releaseController() {
+        if (this::controllerFuture.isInitialized) {
+            MediaController.releaseFuture(controllerFuture)
+        }
+    }
+
+    private val pollRunnable = object : Runnable {
+        override fun run() {
+            val c = controller
+            if (c != null && c.isPlaying) {
+                val resultFuture = c.requestVisualizerData()
+                resultFuture.addListener({
+                    try {
+                        val result = resultFuture.get()
+                        if (result.resultCode == androidx.media3.session.SessionResult.RESULT_SUCCESS) {
+                            val data = result.extras.getFloatArray(Keys.EXTRA_VISUALIZER_DATA)
+                            if (data != null && data.isNotEmpty()) {
+                                visualizerPref?.update(data)
+                            }
+                        } else {
+                            Log.e(TAG, "Custom command failed with result code: ${result.resultCode}")
+                        }
+                    } catch (e: Exception) {
+                        Log.e(TAG, "Error fetching visualizer data", e)
+                    }
+                }, MoreExecutors.directExecutor())
+            }
+            handler.postDelayed(this, 18) // ~60 FPS
+        }
+    }
+
+    private fun startPolling() {
+        handler.removeCallbacks(pollRunnable)
+        handler.post(pollRunnable)
+    }
+
+    private fun stopPolling() {
+        handler.removeCallbacks(pollRunnable)
+    }
+}

app/src/main/java/com/michatec/radio/collection/CollectionAdapter.kt

@@ -1,33 +1,22 @@
-/*
- * CollectionAdapter.kt
- * Implements the CollectionAdapter class
- * A CollectionAdapter is a custom adapter providing station card views for a RecyclerView
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.collection
 
 import android.annotation.SuppressLint
 import android.content.Context
 import android.content.SharedPreferences
+import android.content.res.ColorStateList
 import android.text.Editable
 import android.text.TextWatcher
+import android.view.KeyEvent
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.inputmethod.EditorInfo
 import android.widget.ImageView
+import android.widget.ProgressBar
 import android.widget.TextView
 import androidx.appcompat.app.AppCompatActivity
-import androidx.cardview.widget.CardView
 import androidx.constraintlayout.widget.Group
+import androidx.core.content.ContextCompat
 import androidx.core.net.toUri
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
@@ -37,6 +26,7 @@ import androidx.navigation.findNavController
 import androidx.recyclerview.widget.DiffUtil
 import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.button.MaterialButton
+import com.google.android.material.card.MaterialCardView
 import com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
 import com.google.android.material.textfield.TextInputEditText
 import com.michatec.radio.Keys
@@ -61,11 +51,12 @@ class CollectionAdapter(
     /* Main class variables */
     private lateinit var collectionViewModel: CollectionViewModel
     private var collection: Collection = Collection()
-    private var editStationsEnabled: Boolean = PreferencesHelper.loadEditStationsEnabled()
+    private var editStationsEnabled: Boolean = PreferencesHelper.loadEditStationsEnabled(context)
-    private var editStationStreamsEnabled: Boolean = PreferencesHelper.loadEditStreamUrisEnabled()
+    private var editStationStreamsEnabled: Boolean = PreferencesHelper.loadEditStreamUrisEnabled(context)
     private var expandedStationUuid: String = PreferencesHelper.loadStationListStreamUuid()
     private var expandedStationPosition: Int = -1
     var isExpandedForEdit: Boolean = false
+    private var reorderStationUuid: String = ""
 
 
     /* Listener Interface */
@@ -178,6 +169,9 @@ class CollectionAdapter(
                 addNewViewHolder.settingsButtonView.setOnClickListener {
                     it.findNavController().navigate(R.id.settings_destination)
                 }
+                addNewViewHolder.visualizerButtonView.setOnClickListener {
+                    it.findNavController().navigate(R.id.visualizer_destination)
+                }
             }
             // CASE STATION CARD
             is StationViewHolder -> {
@@ -193,6 +187,19 @@ class CollectionAdapter(
                 setStationImage(stationViewHolder, station)
                 setStationButtons(stationViewHolder, station)
                 setEditViews(stationViewHolder, station)
+                setPlaybackProgress(stationViewHolder, station)
+                setDownloadProgress(stationViewHolder, station)
+
+                stationViewHolder.playButtonView.isGone = true
+
+                // highlight if reordering
+                if (reorderStationUuid == station.uuid) {
+                    stationViewHolder.stationCardView.setStrokeColor(
+                        ColorStateList.valueOf(
+                            ContextCompat.getColor(context, R.color.cardview_reordering)
+                        )
+                    )
+                }
 
                 // show / hide edit views
                 when (expandedStationPosition) {
@@ -211,6 +218,8 @@ class CollectionAdapter(
                             stationViewHolder.stationNameEditView.imeOptions =
                                 EditorInfo.IME_ACTION_DONE
                         }
+                        // Allow internal focus
+                        stationViewHolder.stationCardView.descendantFocusability = ViewGroup.FOCUS_AFTER_DESCENDANTS
                     }
                     // hide edit views
                     else -> {
@@ -219,6 +228,8 @@ class CollectionAdapter(
                         stationViewHolder.stationStarredView.isVisible = station.starred
                         stationViewHolder.editViews.isGone = true
                         stationViewHolder.stationUriEditView.isGone = true
+                        // Block internal focus
+                        stationViewHolder.stationCardView.descendantFocusability = ViewGroup.FOCUS_BLOCK_DESCENDANTS
                     }
                 }
             }
@@ -248,6 +259,28 @@ class CollectionAdapter(
     }
 
 
+    /* Sets the playback progress view */
+    private fun setPlaybackProgress(stationViewHolder: StationViewHolder, station: Station) {
+        if (station.bufferingProgress > 0) {
+            stationViewHolder.bufferingProgress.progress = station.bufferingProgress
+            stationViewHolder.bufferingProgress.isVisible = true
+        } else {
+            stationViewHolder.bufferingProgress.isGone = true
+        }
+    }
+
+
+    /* Sets the download progress view */
+    private fun setDownloadProgress(stationViewHolder: StationViewHolder, station: Station) {
+        if (station.downloadProgress > 0) {
+            stationViewHolder.downloadProgress.progress = station.downloadProgress
+            stationViewHolder.downloadProgress.isVisible = true
+        } else {
+            stationViewHolder.downloadProgress.isGone = true
+        }
+    }
+
+
     /* Sets the edit views */
     private fun setEditViews(stationViewHolder: StationViewHolder, station: Station) {
         stationViewHolder.stationNameEditView.setText(station.name, TextView.BufferType.EDITABLE)
@@ -264,12 +297,12 @@ class CollectionAdapter(
             override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {}
         })
         stationViewHolder.cancelButton.setOnClickListener {
-            val position: Int = stationViewHolder.adapterPosition
+            val position: Int = stationViewHolder.bindingAdapterPosition
             toggleEditViews(position, station.uuid)
             UiHelper.hideSoftKeyboard(context, stationViewHolder.stationNameEditView)
         }
         stationViewHolder.saveButton.setOnClickListener {
-            val position: Int = stationViewHolder.adapterPosition
+            val position: Int = stationViewHolder.bindingAdapterPosition
             toggleEditViews(position, station.uuid)
             saveStation(
                 station,
@@ -280,22 +313,38 @@ class CollectionAdapter(
             UiHelper.hideSoftKeyboard(context, stationViewHolder.stationNameEditView)
         }
         stationViewHolder.placeOnHomeScreenButton.setOnClickListener {
-            val position: Int = stationViewHolder.adapterPosition
+            val position: Int = stationViewHolder.bindingAdapterPosition
             ShortcutHelper.placeShortcut(context, station)
             toggleEditViews(position, station.uuid)
             UiHelper.hideSoftKeyboard(context, stationViewHolder.stationNameEditView)
         }
         stationViewHolder.stationImageChangeView.setOnClickListener {
-            val position: Int = stationViewHolder.adapterPosition
+            val position: Int = stationViewHolder.bindingAdapterPosition
             collectionAdapterListener.onChangeImageButtonTapped(station.uuid)
-            stationViewHolder.adapterPosition
+            stationViewHolder.bindingAdapterPosition
             toggleEditViews(position, station.uuid)
             UiHelper.hideSoftKeyboard(context, stationViewHolder.stationNameEditView)
         }
     }
 
+    /* Shows / hides the reorder highlight for a station */
+    private fun toggleReorderMode(position: Int, stationUuid: String) {
+        if (reorderStationUuid == stationUuid) {
+            reorderStationUuid = ""
+            saveCollectionAfterDragDrop()
+        } else {
+            // collapse edit views if necessary
+            if (isExpandedForEdit) {
+                toggleEditViews(expandedStationPosition, expandedStationUuid)
+            }
+            reorderStationUuid = stationUuid
+        }
+        notifyItemChanged(position)
+    }
+
 
     /* Shows / hides the edit view for a station */
+    @SuppressLint("NotifyDataSetChanged")
     private fun toggleEditViews(position: Int, stationUuid: String) {
         when (stationUuid) {
             // CASE: this station's edit view is already expanded
@@ -328,12 +377,16 @@ class CollectionAdapter(
         when (station.starred) {
             true -> {
                 if (station.imageColor != -1) {
-                    // stationViewHolder.stationCardView.setCardBackgroundColor(station.imageColor)
                     stationViewHolder.stationStarredView.setColorFilter(station.imageColor)
+                } else {
+                    stationViewHolder.stationStarredView.clearColorFilter()
                 }
                 stationViewHolder.stationStarredView.isVisible = true
             }
-            false -> stationViewHolder.stationStarredView.isGone = true
+            false -> {
+                stationViewHolder.stationStarredView.clearColorFilter()
+                stationViewHolder.stationStarredView.isGone = true
+            }
         }
     }
 
@@ -361,6 +414,8 @@ class CollectionAdapter(
             false -> stationViewHolder.playButtonView.visibility = View.INVISIBLE
         }
         stationViewHolder.stationCardView.setOnClickListener {
+            if (reorderStationUuid.isNotEmpty()) return@setOnClickListener
+            if (expandedStationPosition == stationViewHolder.bindingAdapterPosition) return@setOnClickListener
             collectionAdapterListener.onPlayButtonTapped(station.uuid)
         }
         stationViewHolder.playButtonView.setOnClickListener {
@@ -375,9 +430,71 @@ class CollectionAdapter(
         stationViewHolder.stationImageView.setOnClickListener {
             collectionAdapterListener.onPlayButtonTapped(station.uuid)
         }
+
+        // TV improvement: Allow reordering with DPAD
+        stationViewHolder.stationCardView.setOnKeyListener { _, keyCode, event ->
+            if (event.action == KeyEvent.ACTION_DOWN) {
+                // Reorder mode handling
+                if (reorderStationUuid == station.uuid) {
+                    when (keyCode) {
+                        KeyEvent.KEYCODE_DPAD_UP -> {
+                            val currentPos = stationViewHolder.bindingAdapterPosition
+                            if (currentPos > 0) {
+                                onItemMove(currentPos, currentPos - 1)
+                            }
+                            return@setOnKeyListener true
+                        }
+                        KeyEvent.KEYCODE_DPAD_DOWN -> {
+                            val currentPos = stationViewHolder.bindingAdapterPosition
+                            if (currentPos < collection.stations.size - 1) {
+                                onItemMove(currentPos, currentPos + 1)
+                            }
+                            return@setOnKeyListener true
+                        }
+                        KeyEvent.KEYCODE_NUMPAD_2, KeyEvent.KEYCODE_2, KeyEvent.KEYCODE_PLUS,
+                        KeyEvent.KEYCODE_BACK, KeyEvent.KEYCODE_ENTER, KeyEvent.KEYCODE_DPAD_CENTER -> {
+                            toggleReorderMode(stationViewHolder.bindingAdapterPosition, station.uuid)
+                            return@setOnKeyListener true
+                        }
+                        else -> return@setOnKeyListener true // Consume other keys in reorder mode
+                    }
+                }
+
+                when (keyCode) {
+                    KeyEvent.KEYCODE_DPAD_LEFT -> {
+                        if (editStationsEnabled && expandedStationPosition != stationViewHolder.bindingAdapterPosition) {
+                            val position: Int = stationViewHolder.bindingAdapterPosition
+                            toggleEditViews(position, station.uuid)
+                            return@setOnKeyListener true
+                        }
+                    }
+                    KeyEvent.KEYCODE_NUMPAD_3, KeyEvent.KEYCODE_3, KeyEvent.KEYCODE_BACK -> {
+                        if (expandedStationPosition == stationViewHolder.bindingAdapterPosition) {
+                            val position: Int = stationViewHolder.bindingAdapterPosition
+                            toggleEditViews(position, station.uuid)
+                            return@setOnKeyListener true
+                        }
+                    }
+                    KeyEvent.KEYCODE_NUMPAD_0, KeyEvent.KEYCODE_0, KeyEvent.KEYCODE_DEL -> {
+                        removeStation(context, stationViewHolder.bindingAdapterPosition)
+                        return@setOnKeyListener true
+                    }
+                    KeyEvent.KEYCODE_NUMPAD_1, KeyEvent.KEYCODE_1, KeyEvent.KEYCODE_SPACE -> {
+                        toggleStarredStation(context, stationViewHolder.bindingAdapterPosition)
+                        return@setOnKeyListener true
+                    }
+                    KeyEvent.KEYCODE_NUMPAD_2, KeyEvent.KEYCODE_2, KeyEvent.KEYCODE_PLUS -> {
+                        toggleReorderMode(stationViewHolder.bindingAdapterPosition, station.uuid)
+                        return@setOnKeyListener true
+                    }
+                }
+            }
+            false
+        }
+
         stationViewHolder.playButtonView.setOnLongClickListener {
             if (editStationsEnabled) {
-                val position: Int = stationViewHolder.adapterPosition
+                val position: Int = stationViewHolder.bindingAdapterPosition
                 toggleEditViews(position, station.uuid)
                 return@setOnLongClickListener true
             } else {
@@ -386,7 +503,7 @@ class CollectionAdapter(
         }
         stationViewHolder.stationNameView.setOnLongClickListener {
             if (editStationsEnabled) {
-                val position: Int = stationViewHolder.adapterPosition
+                val position: Int = stationViewHolder.bindingAdapterPosition
                 toggleEditViews(position, station.uuid)
                 return@setOnLongClickListener true
             } else {
@@ -395,7 +512,7 @@ class CollectionAdapter(
         }
         stationViewHolder.stationStarredView.setOnLongClickListener {
             if (editStationsEnabled) {
-                val position: Int = stationViewHolder.adapterPosition
+                val position: Int = stationViewHolder.bindingAdapterPosition
                 toggleEditViews(position, station.uuid)
                 return@setOnLongClickListener true
             } else {
@@ -404,7 +521,7 @@ class CollectionAdapter(
         }
         stationViewHolder.stationImageView.setOnLongClickListener {
             if (editStationsEnabled) {
-                val position: Int = stationViewHolder.adapterPosition
+                val position: Int = stationViewHolder.bindingAdapterPosition
                 toggleEditViews(position, station.uuid)
                 return@setOnLongClickListener true
             } else {
@@ -470,24 +587,25 @@ class CollectionAdapter(
 
         } else if (holder is StationViewHolder) {
             // get station from position
-            collection.stations[holder.getAdapterPosition()]
+            val station: Station = collection.stations[holder.bindingAdapterPosition]
 
             for (data in payloads) {
                 when (data as Int) {
                     Keys.HOLDER_UPDATE_COVER -> {
-                        // todo implement
+                        setStationImage(holder, station)
+                        setStarredIcon(holder, station)
                     }
                     Keys.HOLDER_UPDATE_NAME -> {
-                        // todo implement
+                        setStationName(holder, station)
                     }
                     Keys.HOLDER_UPDATE_PLAYBACK_STATE -> {
-                        // todo implement
+                        setStationButtons(holder, station)
                     }
                     Keys.HOLDER_UPDATE_PLAYBACK_PROGRESS -> {
-                        // todo implement
+                        setPlaybackProgress(holder, station)
                     }
                     Keys.HOLDER_UPDATE_DOWNLOAD_STATE -> {
-                        // todo implement
+                        setDownloadProgress(holder, station)
                     }
                 }
             }
@@ -574,21 +692,6 @@ class CollectionAdapter(
     }
 
 
-//    /* Initiates update of a station's information */ // todo move to CollectionHelper
-//    private fun updateStation(context: Context, station: Station) {
-//        if (station.radioBrowserStationUuid.isNotEmpty()) {
-//            // get updated station from radio browser - results are handled by onRadioBrowserSearchResults
-//            val radioBrowserSearch: RadioBrowserSearch = RadioBrowserSearch(context, this)
-//            radioBrowserSearch.searchStation(context, station.radioBrowserStationUuid, Keys.SEARCH_TYPE_BY_UUID)
-//        } else if (station.remoteStationLocation.isNotEmpty()) {
-//            // download playlist // todo check content type detection is necessary here
-//            DownloadHelper.downloadPlaylists(context, arrayOf(station.remoteStationLocation))
-//        } else {
-//            Log.w(TAG, "Unable to update station: ${station.name}.")
-//        }
-//    }
-
-
     /* Determines if position is last */
     private fun isPositionFooter(position: Int): Boolean {
         return position == collection.stations.size
@@ -599,7 +702,7 @@ class CollectionAdapter(
     @SuppressLint("NotifyDataSetChanged")
     private fun updateRecyclerView(oldCollection: Collection, newCollection: Collection) {
         collection = newCollection
-        if (oldCollection.stations.size == 0 && newCollection.stations.size > 0) {
+        if (oldCollection.stations.isEmpty() && newCollection.stations.isNotEmpty()) {
             // data set has been initialized - redraw the whole list
             notifyDataSetChanged()
         } else {
@@ -637,9 +740,9 @@ class CollectionAdapter(
         SharedPreferences.OnSharedPreferenceChangeListener { _, key ->
             when (key) {
                 Keys.PREF_EDIT_STATIONS -> editStationsEnabled =
-                    PreferencesHelper.loadEditStationsEnabled()
+                    PreferencesHelper.loadEditStationsEnabled(context)
                 Keys.PREF_EDIT_STREAMS_URIS -> editStationStreamsEnabled =
-                    PreferencesHelper.loadEditStreamUrisEnabled()
+                    PreferencesHelper.loadEditStreamUrisEnabled(context)
             }
         }
     /*
@@ -650,12 +753,14 @@ class CollectionAdapter(
     /*
      * Inner class: ViewHolder for the Add New Station action
      */
-    private inner class AddNewViewHolder(listItemAddNewLayout: View) :
+    private class AddNewViewHolder(listItemAddNewLayout: View) :
         RecyclerView.ViewHolder(listItemAddNewLayout) {
         val addNewStationView: ExtendedFloatingActionButton =
             listItemAddNewLayout.findViewById(R.id.card_add_new_station)
         val settingsButtonView: ExtendedFloatingActionButton =
             listItemAddNewLayout.findViewById(R.id.card_settings)
+        val visualizerButtonView: ExtendedFloatingActionButton =
+            listItemAddNewLayout.findViewById(R.id.card_visualizer)
     }
     /*
      * End of inner class
@@ -665,14 +770,15 @@ class CollectionAdapter(
     /*
      * Inner class: ViewHolder for a station
      */
-    private inner class StationViewHolder(stationCardLayout: View) :
+    private class StationViewHolder(stationCardLayout: View) :
         RecyclerView.ViewHolder(stationCardLayout) {
-        val stationCardView: CardView = stationCardLayout.findViewById(R.id.station_card)
+        val stationCardView: MaterialCardView = stationCardLayout.findViewById(R.id.station_card)
         val stationImageView: ImageView = stationCardLayout.findViewById(R.id.station_icon)
         val stationNameView: TextView = stationCardLayout.findViewById(R.id.station_name)
         val stationStarredView: ImageView = stationCardLayout.findViewById(R.id.starred_icon)
+        val bufferingProgress: ProgressBar = stationCardLayout.findViewById(R.id.buffering_progress)
+        val downloadProgress: ProgressBar = stationCardLayout.findViewById(R.id.download_progress)
 
-        //        val menuButtonView: ImageView = stationCardLayout.findViewById(R.id.menu_button)
         val playButtonView: ImageView = stationCardLayout.findViewById(R.id.playback_button)
         val editViews: Group = stationCardLayout.findViewById(R.id.default_edit_views)
         val stationImageChangeView: ImageView =

app/src/main/java/com/michatec/radio/collection/CollectionViewModel.kt

@@ -1,17 +1,3 @@
-/*
- * CollectionViewModel.kt
- * Implements the CollectionViewModel class
- * A CollectionViewModel stores the collection of stations as live data
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.collection
 
 import android.app.Application

app/src/main/java/com/michatec/radio/core/Collection.kt

@@ -1,16 +1,3 @@
-/*
- * Collection.kt
- * Implements the Collection class
- * A Collection object holds a list of radio stations
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
 package com.michatec.radio.core
 
 import android.os.Parcelable

app/src/main/java/com/michatec/radio/core/Station.kt

@@ -1,17 +1,3 @@
-/*
- * Station.kt
- * Implements the Station class
- * A Station object holds the base data of a radio
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.core
 
 import android.os.Parcelable
@@ -48,7 +34,9 @@ data class Station(
     @Expose var radioBrowserStationUuid: String = String(),
     @Expose var radioBrowserChangeUuid: String = String(),
     @Expose var bitrate: Int = 0,
-    @Expose var codec: String = String()
+    @Expose var codec: String = String(),
+    @Expose var bufferingProgress: Int = 0,
+    @Expose var downloadProgress: Int = 0
 ) : Parcelable {
 
 
@@ -79,6 +67,12 @@ data class Station(
     }
 
 
+    /* Getter for media type */
+    fun getMediaType(): String {
+        return streamContent
+    }
+
+
     /* Creates a deep copy of a Station */
     fun deepCopy(): Station {
         return Station(
@@ -101,7 +95,9 @@ data class Station(
             radioBrowserStationUuid = radioBrowserStationUuid,
             radioBrowserChangeUuid = radioBrowserChangeUuid,
             bitrate = bitrate,
-            codec = codec
+            codec = codec,
+            bufferingProgress = bufferingProgress,
+            downloadProgress = downloadProgress
         )
     }
 }

app/src/main/java/com/michatec/radio/dialogs/AddStationDialog.kt

@@ -1,22 +1,10 @@
-/*
- * AddStationDialog.kt
- * Implements the AddStationDialog class
- * A AddStationDialog shows a dialog with list of stations to import
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-23 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.dialogs
 
 import android.content.Context
 import android.view.LayoutInflater
+import android.widget.Button
 import androidx.appcompat.app.AlertDialog
+import androidx.core.view.isGone
 import androidx.recyclerview.widget.DefaultItemAnimator
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
@@ -42,13 +30,11 @@ class AddStationDialog (
     }
 
 
-    /* Define log tag */
-    private val TAG = AddStationDialog::class.java.simpleName
-
-
     /* Main class variables */
     private lateinit var dialog: AlertDialog
     private lateinit var stationSearchResultList: RecyclerView
+    private var customPositiveButton: Button? = null
+    private var customNegativeButton: Button? = null
     private lateinit var searchResultAdapter: SearchResultAdapter
     private var station: Station = Station()
 
@@ -77,6 +63,10 @@ class AddStationDialog (
         // set up list of search results
         setupRecyclerView(context)
 
+        // find custom buttons (for TV layout)
+        customPositiveButton = view.findViewById(R.id.dialog_positive_button)
+        customNegativeButton = view.findViewById(R.id.dialog_negative_button)
+
         // add okay ("Add") button
         builder.setPositiveButton(R.string.dialog_find_station_button_add) { _, _ ->
             // listen for click on add button
@@ -92,6 +82,17 @@ class AddStationDialog (
             searchResultAdapter.stopPrePlayback()
         }
 
+        // set up custom buttons if they exist (TV layout)
+        customPositiveButton?.setOnClickListener {
+            listener.onAddStationDialog(station)
+            searchResultAdapter.stopPrePlayback()
+            dialog.dismiss()
+        }
+        customNegativeButton?.setOnClickListener {
+            searchResultAdapter.stopPrePlayback()
+            dialog.dismiss()
+        }
+
         // set dialog view
         builder.setView(view)
 
@@ -99,9 +100,17 @@ class AddStationDialog (
         dialog = builder.create()
         dialog.show()
 
-        // initially disable "Add" button
+        // handle button visibility and state
+        if (customPositiveButton != null) {
+            // hide default buttons if custom ones are used
+            dialog.getButton(AlertDialog.BUTTON_POSITIVE).isGone = true
+            dialog.getButton(AlertDialog.BUTTON_NEGATIVE).isGone = true
+            customPositiveButton?.isEnabled = false
+        } else {
+            // initially disable default "Add" button
             dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
         }
+    }
 
 
     /* Sets up list of results (RecyclerView) */
@@ -121,12 +130,14 @@ class AddStationDialog (
     /* Implement activateAddButton to enable the "Add" button */
     override fun activateAddButton() {
         dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = true
+        customPositiveButton?.isEnabled = true
     }
 
 
     /* Implement deactivateAddButton to disable the "Add" button */
     override fun deactivateAddButton() {
         dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
+        customPositiveButton?.isEnabled = false
     }
 
 

app/src/main/java/com/michatec/radio/dialogs/ErrorDialog.kt

@@ -1,17 +1,3 @@
-/*
- * ErrorDialog.kt
- * Implements the ErrorDialog class
- * An ErrorDialog shows an error dialog with details
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.dialogs
 
 import android.content.Context
@@ -19,6 +5,7 @@ import android.text.method.ScrollingMovementMethod
 import android.view.LayoutInflater
 import android.view.View
 import android.widget.TextView
+import android.widget.Toast
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
@@ -46,9 +33,9 @@ class ErrorDialog {
         // get views
         val inflater: LayoutInflater = LayoutInflater.from(context)
         val view: View = inflater.inflate(R.layout.dialog_generic_with_details, null)
-        val errorMessageView: TextView = view.findViewById(R.id.dialog_message) as TextView
+        val errorMessageView: TextView = view.findViewById(R.id.dialog_message)
-        val errorDetailsLinkView: TextView = view.findViewById(R.id.dialog_details_link) as TextView
+        val errorDetailsLinkView: TextView = view.findViewById(R.id.dialog_details_link)
-        val errorDetailsView: TextView = view.findViewById(R.id.dialog_details) as TextView
+        val errorDetailsView: TextView = view.findViewById(R.id.dialog_details)
 
         // set dialog view
         builder.setView(view)
@@ -81,8 +68,7 @@ class ErrorDialog {
 
         // add okay button
         builder.setPositiveButton(R.string.dialog_generic_button_okay) { _, _ ->
-            // listen for click on okay button
+            Toast.makeText(context, R.string.dialog_generic_button_okay, Toast.LENGTH_SHORT).show()
-            // do nothing
         }
 
         // display error dialog

app/src/main/java/com/michatec/radio/dialogs/FindStationDialog.kt

@@ -1,17 +1,3 @@
-/*
- * FindStationDialog.kt
- * Implements the FindStationDialog class
- * A FindStationDialog shows a dialog with search box and list of results
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.dialogs
 
 import android.annotation.SuppressLint
@@ -21,6 +7,7 @@ import android.os.Handler
 import android.os.Looper
 import android.view.LayoutInflater
 import android.view.inputmethod.InputMethodManager
+import android.widget.Button
 import android.widget.ProgressBar
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.widget.SearchView
@@ -63,6 +50,8 @@ class FindStationDialog (
     private lateinit var searchRequestProgressIndicator: ProgressBar
     private lateinit var noSearchResultsTextView: MaterialTextView
     private lateinit var stationSearchResultList: RecyclerView
+    private var customPositiveButton: Button? = null
+    private var customNegativeButton: Button? = null
     private lateinit var searchResultAdapter: SearchResultAdapter
     private lateinit var radioBrowserSearch: RadioBrowserSearch
     private lateinit var directInputCheck: DirectInputCheck
@@ -134,6 +123,10 @@ class FindStationDialog (
         // set up list of search results
         setupRecyclerView(context)
 
+        // find custom buttons (for TV layout)
+        customPositiveButton = view.findViewById(R.id.dialog_positive_button)
+        customNegativeButton = view.findViewById(R.id.dialog_negative_button)
+
         // add okay ("Add") button
         builder.setPositiveButton(R.string.dialog_find_station_button_add) { _, _ ->
             // listen for click on add button
@@ -152,6 +145,18 @@ class FindStationDialog (
             searchResultAdapter.stopPrePlayback()
         }
 
+        // set up custom buttons if they exist (TV layout)
+        customPositiveButton?.setOnClickListener {
+            listener.onFindStationDialog(station)
+            searchResultAdapter.stopPrePlayback()
+            dialog.dismiss()
+        }
+        customNegativeButton?.setOnClickListener {
+            radioBrowserSearch.stopSearchRequest()
+            searchResultAdapter.stopPrePlayback()
+            dialog.dismiss()
+        }
+
         // listen for input
         stationSearchBoxView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
             override fun onQueryTextChange(query: String): Boolean {
@@ -174,11 +179,19 @@ class FindStationDialog (
         dialog = builder.create()
         dialog.show()
 
-        // initially disable "Add" button
+        // handle button visibility and state
+        if (customPositiveButton != null) {
+            // hide default buttons if custom ones are used
+            dialog.getButton(AlertDialog.BUTTON_POSITIVE).isGone = true
+            dialog.getButton(AlertDialog.BUTTON_NEGATIVE).isGone = true
+            customPositiveButton?.isEnabled = false
+        } else {
+            // initially disable default "Add" button
             dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
             dialog.getButton(AlertDialog.BUTTON_POSITIVE).isAllCaps = true
             dialog.getButton(AlertDialog.BUTTON_NEGATIVE).isAllCaps = true
         }
+    }
 
 
     /* Sets up list of results (RecyclerView) */
@@ -242,12 +255,14 @@ class FindStationDialog (
     /* Makes the "Add" button clickable */
     override fun activateAddButton() {
         dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = true
+        customPositiveButton?.isEnabled = true
         searchRequestProgressIndicator.isGone = true
         noSearchResultsTextView.isGone = true
     }
 
     override fun deactivateAddButton() {
         dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
+        customPositiveButton?.isEnabled = false
         searchRequestProgressIndicator.isGone = true
         noSearchResultsTextView.isGone = true
     }
@@ -256,6 +271,7 @@ class FindStationDialog (
     /* Resets the dialog layout to default state */
     private fun resetLayout(clearAdapter: Boolean = false) {
         dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
+        customPositiveButton?.isEnabled = false
         searchRequestProgressIndicator.isGone = true
         noSearchResultsTextView.isGone = true
         searchResultAdapter.resetSelection(clearAdapter)
@@ -265,6 +281,7 @@ class FindStationDialog (
     /* Display the "No Results" error - hide other unneeded views */
     private fun showNoResultsError() {
         dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
+        customPositiveButton?.isEnabled = false
         searchRequestProgressIndicator.isGone = true
         noSearchResultsTextView.isVisible = true
     }
@@ -273,6 +290,7 @@ class FindStationDialog (
     /* Display the "No Results" error - hide other unneeded views */
     private fun showProgressIndicator() {
         dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
+        customPositiveButton?.isEnabled = false
         searchRequestProgressIndicator.isVisible = true
         noSearchResultsTextView.isGone = true
     }

app/src/main/java/com/michatec/radio/dialogs/PresetSelectionDialog.kt

@@ -0,0 +1,86 @@
+package com.michatec.radio.dialogs
+
+import android.content.Context
+import android.view.LayoutInflater
+import android.widget.RadioButton
+import androidx.appcompat.app.AlertDialog
+import androidx.core.content.ContextCompat.getString
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.michatec.radio.R
+import com.michatec.radio.helpers.PreferencesHelper
+
+
+/*
+ * PresetSelectionDialog class
+ */
+class PresetSelectionDialog(private var presetSelectionDialogListener: PresetSelectionDialogListener) {
+
+    /* Interface used to communicate back to activity */
+    interface PresetSelectionDialogListener {
+        fun onPresetSelectionDialog(dialogResult: Boolean, selectedPreset: String)
+    }
+
+
+    /* Main class variables */
+    private lateinit var dialog: AlertDialog
+
+
+    /* Construct and show dialog */
+    fun show(context: Context) {
+        // prepare dialog builder
+        val builder = MaterialAlertDialogBuilder(context)
+
+        // inflate custom layout
+        val inflater = LayoutInflater.from(context)
+        val view = inflater.inflate(R.layout.dialog_preset_selection, null)
+
+        // find radio buttons
+        val radioGroup = view.findViewById<android.widget.RadioGroup>(R.id.preset_radio_group)
+        val radioNone = view.findViewById<RadioButton>(R.id.radio_preset_none)
+        val radioRock = view.findViewById<RadioButton>(R.id.radio_preset_rock)
+        val radioPop = view.findViewById<RadioButton>(R.id.radio_preset_pop)
+        val radioJazz = view.findViewById<RadioButton>(R.id.radio_preset_jazz)
+        val radioFlat = view.findViewById<RadioButton>(R.id.radio_preset_flat)
+
+        // set current selection
+        val currentPreset = PreferencesHelper.loadSelectedPreset()
+        when (currentPreset) {
+            "" -> radioNone.isChecked = true
+            getString(context, R.string.pref_preset_rock) -> radioRock.isChecked = true
+            getString(context, R.string.pref_preset_pop) -> radioPop.isChecked = true
+            getString(context, R.string.pref_preset_jazz) -> radioJazz.isChecked = true
+            getString(context, R.string.pref_preset_flat) -> radioFlat.isChecked = true
+            else -> radioNone.isChecked = true
+        }
+
+        // set up radio group listener
+        radioGroup.setOnCheckedChangeListener { _, checkedId ->
+            val selectedPreset = when (checkedId) {
+                R.id.radio_preset_none -> ""
+                R.id.radio_preset_rock -> getString(context, R.string.pref_preset_rock)
+                R.id.radio_preset_pop -> getString(context, R.string.pref_preset_pop)
+                R.id.radio_preset_jazz -> getString(context, R.string.pref_preset_jazz)
+                R.id.radio_preset_flat -> getString(context, R.string.pref_preset_flat)
+                else -> ""
+            }
+            // save preset selection to preferences
+            PreferencesHelper.saveSelectedPreset(selectedPreset)
+            // notify listener
+            presetSelectionDialogListener.onPresetSelectionDialog(true, selectedPreset)
+            // dismiss dialog
+            dialog.dismiss()
+        }
+
+        // set custom view
+        builder.setView(view)
+
+        // handle outside-click as cancel
+        builder.setOnCancelListener {
+            presetSelectionDialogListener.onPresetSelectionDialog(false, "")
+        }
+
+        // display dialog
+        dialog = builder.create()
+        dialog.show()
+    }
+}

app/src/main/java/com/michatec/radio/dialogs/ThemeSelectionDialog.kt

@@ -0,0 +1,89 @@
+package com.michatec.radio.dialogs
+
+import android.content.Context
+import android.view.LayoutInflater
+import android.widget.RadioButton
+import androidx.appcompat.app.AlertDialog
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.michatec.radio.Keys
+import com.michatec.radio.R
+import com.michatec.radio.helpers.AppThemeHelper
+import com.michatec.radio.helpers.PreferencesHelper
+
+
+/*
+ * ThemeSelectionDialog class
+ */
+class ThemeSelectionDialog(private var themeSelectionDialogListener: ThemeSelectionDialogListener) {
+
+    /* Interface used to communicate back to activity */
+    interface ThemeSelectionDialogListener {
+        fun onThemeSelectionDialog(dialogResult: Boolean, selectedTheme: String) {
+        }
+    }
+
+
+    /* Main class variables */
+    private lateinit var dialog: AlertDialog
+
+
+    /* Construct and show dialog */
+    fun show(context: Context) {
+        // prepare dialog builder
+        val builder = MaterialAlertDialogBuilder(context)
+
+        // inflate custom layout
+        val inflater = LayoutInflater.from(context)
+        val view = inflater.inflate(R.layout.dialog_theme_selection, null)
+
+        // find radio buttons
+        val radioGroup = view.findViewById<android.widget.RadioGroup>(R.id.theme_radio_group)
+        val radioFollowSystem = view.findViewById<RadioButton>(R.id.radio_theme_follow_system)
+        val radioLight = view.findViewById<RadioButton>(R.id.radio_theme_light)
+        val radioDark = view.findViewById<RadioButton>(R.id.radio_theme_dark)
+
+        // set current selection
+        val currentTheme = AppThemeHelper.getCurrentTheme(context)
+        when (currentTheme) {
+            context.getString(R.string.pref_theme_selection_mode_device_default) -> {
+                radioFollowSystem.isChecked = true
+            }
+            context.getString(R.string.pref_theme_selection_mode_light) -> {
+                radioLight.isChecked = true
+            }
+            context.getString(R.string.pref_theme_selection_mode_dark) -> {
+                radioDark.isChecked = true
+            }
+        }
+
+        // set up radio group listener
+        radioGroup.setOnCheckedChangeListener { _, checkedId ->
+            val selectedTheme = when (checkedId) {
+                R.id.radio_theme_follow_system -> Keys.STATE_THEME_FOLLOW_SYSTEM
+                R.id.radio_theme_light -> Keys.STATE_THEME_LIGHT_MODE
+                R.id.radio_theme_dark -> Keys.STATE_THEME_DARK_MODE
+                else -> Keys.STATE_THEME_FOLLOW_SYSTEM
+            }
+            // save theme selection to preferences
+            PreferencesHelper.saveThemeSelection(selectedTheme)
+            // apply theme immediately
+            AppThemeHelper.setTheme(selectedTheme)
+            // notify listener
+            themeSelectionDialogListener.onThemeSelectionDialog(true, selectedTheme)
+            // dismiss dialog
+            dialog.dismiss()
+        }
+
+        // set custom view
+        builder.setView(view)
+
+        // handle outside-click as cancel
+        builder.setOnCancelListener {
+            themeSelectionDialogListener.onThemeSelectionDialog(false, Keys.STATE_THEME_FOLLOW_SYSTEM)
+        }
+
+        // display dialog
+        dialog = builder.create()
+        dialog.show()
+    }
+}

app/src/main/java/com/michatec/radio/dialogs/YesNoDialog.kt

@@ -1,17 +1,3 @@
-/*
- * YesNoDialog
- * Implements the YesNoDialog class
- * A YesNoDialog asks the user if he/she wants to do something or not
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.dialogs
 
 import android.content.Context

app/src/main/java/com/michatec/radio/extensions/ArrayListExt.kt

@@ -1,18 +1,3 @@
-/*
- * ArrayListExt.kt
- * Implements the ArrayListExt extension methods
- * Useful extension methods for ArrayLists
- * Source: https://raw.githubusercontent.com/googlesamples/android-UniversalMusicPlayer/master/common/src/main/java/com/example/android/uamp/media/extensions/MediaMetadataCompatExt.kt
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.extensions
 
 

app/src/main/java/com/michatec/radio/extensions/MediaControllerExt.kt

@@ -1,22 +1,7 @@
-/*
- * MediaControllerExt.kt
- * Implements the MediaControllerExt extension methods
- * Useful extension methods for MediaController
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.extensions
 
 import android.content.Context
 import android.os.Bundle
-import androidx.core.os.bundleOf
 import androidx.media3.session.MediaController
 import androidx.media3.session.SessionCommand
 import androidx.media3.session.SessionResult
@@ -50,7 +35,7 @@ fun MediaController.requestSleepTimerRemaining(): ListenableFuture<SessionResult
 }
 
 
-/* Request sleep timer remaining */
+/* Request metadata history */
 fun MediaController.requestMetadataHistory(): ListenableFuture<SessionResult> {
     return sendCustomCommand(
         SessionCommand(Keys.CMD_REQUEST_METADATA_HISTORY, Bundle.EMPTY),
@@ -58,6 +43,14 @@ fun MediaController.requestMetadataHistory(): ListenableFuture<SessionResult> {
     )
 }
 
+/* Request visualizer data */
+fun MediaController.requestVisualizerData(): ListenableFuture<SessionResult> {
+    return sendCustomCommand(
+        SessionCommand(Keys.CMD_GET_VISUALIZER_DATA, Bundle.EMPTY),
+        Bundle.EMPTY
+    )
+}
+
 
 /* Starts playback with a new media item */
 fun MediaController.play(context: Context, station: Station) {
@@ -71,8 +64,11 @@ fun MediaController.play(context: Context, station: Station) {
 
 /* Starts playback with of a stream url */
 fun MediaController.playStreamDirectly(streamUri: String) {
+    val bundle = Bundle().apply {
+        putString(Keys.KEY_STREAM_URI, streamUri)
+    }
     sendCustomCommand(
         SessionCommand(Keys.CMD_PLAY_STREAM, Bundle.EMPTY),
-        bundleOf(Pair(Keys.KEY_STREAM_URI, streamUri))
+        bundle
     )
 }

app/src/main/java/com/michatec/radio/helpers/AppThemeHelper.kt

@@ -1,25 +1,7 @@
-/*
- * AppThemeHelper.kt
- * Implements the AppThemeHelper object
- * A AppThemeHelper can set the different app themes: Light Mode, Dark Mode, Follow System
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.content.Context
-import android.content.res.TypedArray
 import android.util.Log
-import android.util.TypedValue
-import androidx.annotation.AttrRes
-import androidx.annotation.ColorInt
 import androidx.appcompat.app.AppCompatDelegate
 import com.michatec.radio.Keys
 import com.michatec.radio.R
@@ -33,8 +15,6 @@ object AppThemeHelper {
     /* Define log tag */
     private val TAG: String = AppThemeHelper::class.java.simpleName
 
-    private val sTypedValue = TypedValue()
-
     /* Sets app theme */
     fun setTheme(nightModeState: String) {
         when (nightModeState) {
@@ -76,14 +56,4 @@ object AppThemeHelper {
             else -> context.getString(R.string.pref_theme_selection_mode_device_default)
         }
     }
-
-
-    @ColorInt
-    fun getColor(context: Context, @AttrRes resource: Int): Int {
-        val a: TypedArray = context.obtainStyledAttributes(sTypedValue.data, intArrayOf(resource))
-        val color = a.getColor(0, 0)
-        a.recycle()
-        return color
-    }
-
 }

app/src/main/java/com/michatec/radio/helpers/AudioHelper.kt

@@ -1,23 +1,13 @@
-/*
- * AudioHelper.kt
- * Implements the AudioHelper object
- * A AudioHelper provides helper methods for handling audio files
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.util.Log
+import androidx.annotation.OptIn
 import androidx.media3.common.Metadata
+import androidx.media3.common.util.UnstableApi
 import androidx.media3.extractor.metadata.icy.IcyHeaders
 import androidx.media3.extractor.metadata.icy.IcyInfo
+import androidx.media3.extractor.metadata.id3.Id3Frame
+import androidx.media3.extractor.metadata.id3.TextInformationFrame
 import com.michatec.radio.Keys
 import kotlin.math.min
 
@@ -33,29 +23,53 @@ object AudioHelper {
 
 
     /* Extract audio stream metadata */
+    @OptIn(UnstableApi::class)
     fun getMetadataString(metadata: Metadata): String {
-        var metadataString = String()
+        var title = ""
+        var artist = ""
+        var album = ""
         for (i in 0 until metadata.length()) {
             // extract IceCast metadata
             when (val entry = metadata.get(i)) {
                 is IcyInfo -> {
-                    metadataString = entry.title.toString()
+                    title = entry.title.toString()
                 }
 
                 is IcyHeaders -> {
                     Log.i(TAG, "icyHeaders:" + entry.name + " - " + entry.genre)
                 }
 
+                is Id3Frame -> {
+                    when (entry) {
+                        is TextInformationFrame -> {
+                            when (entry.id) {
+                                "TIT2" -> title = entry.values.getOrNull(0) ?: "" // Title
+                                "TPE1" -> artist = entry.values.getOrNull(0) ?: "" // Artist
+                                "TALB" -> album = entry.values.getOrNull(0) ?: "" // Album
+                            }
+                        }
+                        else -> {
+                            Log.d(TAG, "Unhandled ID3 frame: ${entry.javaClass.simpleName}")
+                        }
+                    }
+                }
+
                 else -> {
                     Log.w(TAG, "Unsupported metadata received (type = ${entry.javaClass.simpleName})")
                 }
             }
-            // TODO implement HLS metadata extraction (Id3Frame / PrivFrame)
+        }
-            // https://exoplayer.dev/doc/reference/com/google/android/exoplayer2/metadata/Metadata.Entry.html
+        // Build metadata string
+        var metadataString = title
+        if (artist.isNotEmpty() && title.isNotEmpty()) {
+            metadataString = "$artist - $title"
+        }
+        if (album.isNotEmpty() && metadataString.isNotEmpty()) {
+            metadataString += " ($album)"
         }
         // ensure a max length of the metadata string
         if (metadataString.isNotEmpty()) {
-            metadataString = metadataString.substring(0, min(metadataString.length, Keys.DEFAULT_MAX_LENGTH_OF_METADATA_ENTRY))
+            metadataString = metadataString.take(min(metadataString.length, Keys.DEFAULT_MAX_LENGTH_OF_METADATA_ENTRY))
         }
         return metadataString
     }

app/src/main/java/com/michatec/radio/helpers/BackupHelper.kt

@@ -1,17 +1,3 @@
-/*
- * BackupHelper.kt
- * Implements the BackupHelper object
- * A BackupHelper provides helper methods for backing up and restoring the radio station collection
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.content.ContentResolver
@@ -67,7 +53,7 @@ object BackupHelper {
         Snackbar.make(view, R.string.toastmessage_restored, Snackbar.LENGTH_LONG).show()
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
-            // bypass "ZipException" for Android 14 or above applications when zip file names contain ".." or start with "/"
+            // bypass "ZipException" for Android 14 or above applications when zip file names contain "." or start with "/"
             dalvik.system.ZipPathValidator.clearCallback()
         }
 

app/src/main/java/com/michatec/radio/helpers/CollectionHelper.kt

@@ -1,17 +1,3 @@
-/*
- * CollectionHelper.kt
- * Implements the CollectionHelper object
- * A CollectionHelper provides helper methods for the collection of stations
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.content.Context
@@ -288,32 +274,6 @@ object CollectionHelper {
     }
 
 
-    /* Gets MediaIem for next station within collection */
-    fun getNextMediaItem(context: Context, collection: Collection, stationUuid: String): MediaItem {
-        val currentStationPosition: Int = getStationPosition(collection, stationUuid)
-        return if (collection.stations.isEmpty() || currentStationPosition == -1) {
-            buildMediaItem(context, Station())
-        } else if (currentStationPosition < collection.stations.size -1) {
-            buildMediaItem(context, collection.stations[currentStationPosition + 1])
-        } else {
-            buildMediaItem(context, collection.stations.first())
-        }
-    }
-
-
-    /* Gets MediaIem for previous station within collection */
-    fun getPreviousMediaItem(context: Context, collection: Collection, stationUuid: String): MediaItem {
-        val currentStationPosition: Int = getStationPosition(collection, stationUuid)
-        return if (collection.stations.isEmpty() || currentStationPosition == -1) {
-            buildMediaItem(context, Station())
-        } else if (currentStationPosition > 0) {
-            buildMediaItem(context, collection.stations[currentStationPosition - 1])
-        } else {
-            buildMediaItem(context, collection.stations.last())
-        }
-    }
-
-
     /* Get the position from collection for given UUID */
     fun getStationPosition(collection: Collection, stationUuid: String): Int {
         collection.stations.forEachIndexed { stationId, station ->
@@ -339,7 +299,7 @@ object CollectionHelper {
     }
 
 
-    /* Returns the children stations under under root (simple media library structure: root > stations) */
+    /* Returns the children stations under root (simple media library structure: root > stations) */
     fun getChildren(context: Context, collection: Collection): List<MediaItem> {
         val mediaItems: MutableList<MediaItem> = mutableListOf()
         collection.stations.forEach { station ->
@@ -561,7 +521,7 @@ object CollectionHelper {
     fun exportCollectionM3u(context: Context, collection: Collection) {
         Log.v(TAG, "Exporting collection of stations as M3U")
         // export collection as M3U - launch = fire & forget (no return value from save collection)
-        if (collection.stations.size > 0) {
+        if (collection.stations.isNotEmpty()) {
             CoroutineScope(IO).launch {
                 FileHelper.backupCollectionAsM3uSuspended(
                     context,
@@ -603,7 +563,7 @@ object CollectionHelper {
     fun exportCollectionPls(context: Context, collection: Collection) {
         Log.v(TAG, "Exporting collection of stations as PLS")
         // export collection as PLS - launch = fire & forget (no return value from save collection)
-        if (collection.stations.size > 0) {
+        if (collection.stations.isNotEmpty()) {
             CoroutineScope(IO).launch {
                 FileHelper.backupCollectionAsPlsSuspended(
                     context,
@@ -670,76 +630,38 @@ object CollectionHelper {
         LocalBroadcastManager.getInstance(context).sendBroadcast(collectionChangedIntent)
     }
 
-
-    //    /* Creates MediaMetadata for a single station - used in media session*/
-//    fun buildStationMediaMetadata(context: Context, station: Station, metadata: String): MediaMetadataCompat {
-//        return MediaMetadataCompat.Builder().apply {
-//            putString(MediaMetadataCompat.METADATA_KEY_ARTIST, station.name)
-//            putString(MediaMetadataCompat.METADATA_KEY_TITLE, metadata)
-//            putString(MediaMetadataCompat.METADATA_KEY_ALBUM, context.getString(R.string.app_name))
-//            putString(MediaMetadataCompat.METADATA_KEY_MEDIA_URI, station.getStreamUri())
-//            putBitmap(MediaMetadataCompat.METADATA_KEY_ALBUM_ART, ImageHelper.getScaledStationImage(context, station.image, Keys.SIZE_COVER_LOCK_SCREEN))
-//            //putString(MediaMetadataCompat.METADATA_KEY_ALBUM_ART_URI, station.image)
-//        }.build()
-//    }
-//
-//
-//    /* Creates MediaItem for a station - used by collection provider */
-//    fun buildStationMediaMetaItem(context: Context, station: Station): MediaBrowserCompat.MediaItem {
-//        val mediaDescriptionBuilder = MediaDescriptionCompat.Builder()
-//        mediaDescriptionBuilder.setMediaId(station.uuid)
-//        mediaDescriptionBuilder.setTitle(station.name)
-//        mediaDescriptionBuilder.setIconBitmap(ImageHelper.getScaledStationImage(context, station.image, Keys.SIZE_COVER_LOCK_SCREEN))
-//        // mediaDescriptionBuilder.setIconUri(station.image.toUri())
-//        return MediaBrowserCompat.MediaItem(mediaDescriptionBuilder.build(), MediaBrowserCompat.MediaItem.FLAG_PLAYABLE)
-//    }
-//
-//
-//    /* Creates description for a station - used in MediaSessionConnector */
-//    fun buildStationMediaDescription(context: Context, station: Station, metadata: String): MediaDescriptionCompat {
-//        val coverBitmap: Bitmap = ImageHelper.getScaledStationImage(context, station.image, Keys.SIZE_COVER_LOCK_SCREEN)
-//        val extras: Bundle = Bundle()
-//        extras.putParcelable(MediaMetadataCompat.METADATA_KEY_ALBUM_ART, coverBitmap)
-//        extras.putParcelable(MediaMetadataCompat.METADATA_KEY_DISPLAY_ICON, coverBitmap)
-//        return MediaDescriptionCompat.Builder().apply {
-//            setMediaId(station.uuid)
-//            setIconBitmap(coverBitmap)
-//            setIconUri(station.image.toUri())
-//            setTitle(metadata)
-//            setSubtitle(station.name)
-//            setExtras(extras)
-//        }.build()
-//    }
-
-
     /* Creates a MediaItem with MediaMetadata for a single radio station - used to prepare player */
     fun buildMediaItem(context: Context, station: Station): MediaItem {
-        // todo implement HLS MediaItems
         // put uri in RequestMetadata - credit: https://stackoverflow.com/a/70103460
         val requestMetadata = MediaItem.RequestMetadata.Builder().apply {
             setMediaUri(station.getStreamUri().toUri())
         }.build()
         // build MediaMetadata
         val mediaMetadata = MediaMetadata.Builder().apply {
+            setTitle(station.name)
             setArtist(station.name)
-            //setTitle(station.name)
+            
+            // Set artwork URI for casting (remote devices need a public URL)
+            if (station.remoteImageLocation.isNotEmpty()) {
+                setArtworkUri(station.remoteImageLocation.toUri())
+            }
+
             /* check for "file://" prevents a crash when an old backup was restored */
             if (station.image.isNotEmpty() && station.image.startsWith("file://")) {
-                //setArtworkUri(station.image.toUri())
                 setArtworkData(station.image.toUri().toFile().readBytes(), MediaMetadata.PICTURE_TYPE_FRONT_COVER)
             } else {
-                //setArtworkUri(Uri.parse(Keys.LOCATION_RESOURCES + R.raw.ic_default_station_image))
                 setArtworkData(ImageHelper.getStationImageAsByteArray(context), MediaMetadata.PICTURE_TYPE_FRONT_COVER)
             }
             setIsBrowsable(false)
             setIsPlayable(true)
+            setMediaType(MediaMetadata.MEDIA_TYPE_RADIO_STATION)
         }.build()
         // build MediaItem and return it
         return MediaItem.Builder().apply {
             setMediaId(station.uuid)
             setRequestMetadata(requestMetadata)
             setMediaMetadata(mediaMetadata)
-            //setMimeType(station.getMediaType())
+            setMimeType(station.getMediaType())
             setUri(station.getStreamUri().toUri())
         }.build()
     }

app/src/main/java/com/michatec/radio/helpers/DateTimeHelper.kt

@@ -1,17 +1,3 @@
-/*
- * DateTimeHelper.kt
- * Implements the DateTimeHelper object
- * A DateTimeHelper provides helper methods for converting Date and Time objects
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.util.Log
@@ -31,14 +17,14 @@ object DateTimeHelper {
 
 
     /* Main class variables */
-    private const val pattern: String = "EEE, dd MMM yyyy HH:mm:ss Z"
+    private const val PATTERN: String = "EEE, dd MMM yyyy HH:mm:ss Z"
-    private val dateFormat: SimpleDateFormat = SimpleDateFormat(pattern, Locale.ENGLISH)
+    private val dateFormat: SimpleDateFormat = SimpleDateFormat(PATTERN, Locale.ENGLISH)
 
 
     /* Converts RFC 2822 string representation of a date to DATE */
     fun convertFromRfc2822(dateString: String): Date {
         val date: Date = try {
-            // parse date string using standard pattern
+            // parse date string using standard PATTERN
             dateFormat.parse((dateString)) ?: Keys.DEFAULT_DATE
         } catch (e: Exception) {
             Log.w(TAG, "Unable to parse. Trying an alternative Date format. $e")
@@ -51,7 +37,7 @@ object DateTimeHelper {
 
     /* Converts a DATE to its RFC 2822 string representation */
     fun convertToRfc2822(date: Date): String {
-        val dateFormat = SimpleDateFormat(pattern, Locale.ENGLISH)
+        val dateFormat = SimpleDateFormat(PATTERN, Locale.ENGLISH)
         return dateFormat.format(date)
     }
 

app/src/main/java/com/michatec/radio/helpers/DownloadFinishedReceiver.kt

@@ -1,17 +1,3 @@
-/*
- * DownloadFinishedReceiver.kt
- * Implements the DownloadFinishedReceiver class
- * A DownloadFinishedReceiver listens for finished downloads
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.app.DownloadManager

app/src/main/java/com/michatec/radio/helpers/DownloadHelper.kt

@@ -1,17 +1,3 @@
-/*
- * DownloadHelper.kt
- * Implements the DownloadHelper object
- * A DownloadHelper provides helper methods for downloading files
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.app.DownloadManager
@@ -384,7 +370,7 @@ object DownloadHelper {
     private fun determineAllowedNetworkTypes(type: Int, ignoreWifiRestriction: Boolean): Int {
         var allowedNetworkTypes: Int =
             (DownloadManager.Request.NETWORK_WIFI or DownloadManager.Request.NETWORK_MOBILE)
-        // restrict download of audio files to WiFi if necessary
+        // restrict download of audio files to Wi-Fi if necessary
         if (type == Keys.FILE_TYPE_AUDIO) {
             if (!ignoreWifiRestriction && !PreferencesHelper.downloadOverMobile()) {
                 allowedNetworkTypes = DownloadManager.Request.NETWORK_WIFI

app/src/main/java/com/michatec/radio/helpers/ExtrasHelper.kt

@@ -0,0 +1,117 @@
+package com.michatec.radio.helpers
+
+import android.content.Context
+import android.util.AttributeSet
+import android.util.Log
+import android.view.Surface
+import android.view.SurfaceHolder
+import android.view.SurfaceView
+import android.view.ViewGroup
+import android.widget.FrameLayout
+import androidx.preference.Preference
+import androidx.preference.PreferenceViewHolder
+import com.michatec.radio.R
+
+class ExtrasHelper {
+    companion object {
+        private const val TAG = "ExtrasHelper"
+        init {
+            try {
+                System.loadLibrary("extra")
+            } catch (e: Exception) {
+                Log.e(TAG, "Failed to load extra library", e)
+            }
+        }
+
+        @JvmStatic
+        private external fun visualize(surface: Surface, data: FloatArray)
+
+        fun render(surface: Surface, data: FloatArray) {
+            if (!surface.isValid) return
+            try {
+                visualize(surface, data)
+            } catch (e: Exception) {
+                Log.e(TAG, "Native visualize failed", e)
+            }
+        }
+    }
+
+    class VisualizerPreference(context: Context, attrs: AttributeSet? = null) : Preference(context, attrs) {
+        private var visualizerView: VisualizerView? = null
+
+        init {
+            // We can use a standard layout and inject our view
+            layoutResource = R.layout.preference_visualizer
+        }
+
+        override fun onBindViewHolder(holder: PreferenceViewHolder) {
+            super.onBindViewHolder(holder)
+            
+            // Try to find the container in the inflated layout
+            var container = holder.findViewById(R.id.visualizer_container) as? ViewGroup
+
+            // Fallback: If not found by ID, maybe the root is the container?
+            if (container == null && holder.itemView is ViewGroup) {
+                container = holder.itemView as ViewGroup
+            }
+
+            if (container != null) {
+                if (visualizerView == null) {
+                    visualizerView = VisualizerView(context).apply {
+                        layoutParams = ViewGroup.LayoutParams(
+                            ViewGroup.LayoutParams.MATCH_PARENT,
+                            ViewGroup.LayoutParams.MATCH_PARENT
+                        )
+                    }
+                }
+
+                val currentParent = visualizerView?.parent as? ViewGroup
+                if (currentParent != container) {
+                    currentParent?.removeView(visualizerView)
+                    // If we injected into a standard preference, don't clear everything, just add
+                    if (container is FrameLayout || container.childCount == 0) {
+                        container.removeAllViews()
+                    }
+                    container.addView(visualizerView)
+                }
+            } else {
+                Log.e("VisualizerPreference", "Could not find any container to attach VisualizerView!")
+            }
+        }
+
+        fun update(data: FloatArray) {
+            visualizerView?.update(data)
+        }
+    }
+
+    class VisualizerView @JvmOverloads constructor(
+        context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
+    ) : SurfaceView(context, attrs, defStyleAttr), SurfaceHolder.Callback {
+
+        private var surface: Surface? = null
+
+        init {
+            Log.d("VisualizerView", "VisualizerView initialized")
+            holder.addCallback(this)
+        }
+
+        fun update(data: FloatArray) {
+            val s = surface
+            if (s != null && s.isValid) {
+                render(s, data)
+            }
+        }
+
+        override fun surfaceCreated(holder: SurfaceHolder) {
+            surface = holder.surface
+        }
+
+        override fun surfaceChanged(holder: SurfaceHolder, format: Int, width: Int, height: Int) {
+            surface = holder.surface
+        }
+
+        override fun surfaceDestroyed(holder: SurfaceHolder) {
+            surface = null
+        }
+    }
+}

app/src/main/java/com/michatec/radio/helpers/FileHelper.kt

@@ -1,17 +1,3 @@
-/*
- * FileHelper.kt
- * Implements the FileHelper object
- * A FileHelper provides helper methods for reading and writing files from and to device storage
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.app.Activity
@@ -33,7 +19,6 @@ import kotlinx.coroutines.Dispatchers.IO
 import java.io.*
 import java.util.*
 import kotlin.coroutines.resume
-import kotlin.coroutines.suspendCoroutine
 
 
 /*
@@ -246,7 +231,7 @@ object FileHelper {
             File(activity.getExternalFilesDir(Keys.FOLDER_COLLECTION), Keys.COLLECTION_M3U_FILE)
         if (!m3uFile.exists()) {
             m3uFile = File(
-                activity.getExternalFilesDir(Keys.URLRADIO_LEGACY_FOLDER_COLLECTION),
+                activity.getExternalFilesDir(Keys.RADIO_LEGACY_FOLDER_COLLECTION),
                 Keys.COLLECTION_M3U_FILE
             )
         }
@@ -270,7 +255,7 @@ object FileHelper {
             File(activity.getExternalFilesDir(Keys.FOLDER_COLLECTION), Keys.COLLECTION_PLS_FILE)
         if (!plsFile.exists()) {
             plsFile = File(
-                activity.getExternalFilesDir(Keys.URLRADIO_LEGACY_FOLDER_COLLECTION),
+                activity.getExternalFilesDir(Keys.RADIO_LEGACY_FOLDER_COLLECTION),
                 Keys.COLLECTION_PLS_FILE
             )
         }
@@ -292,7 +277,7 @@ object FileHelper {
         collection: Collection,
         lastUpdate: Date
     ) {
-        return suspendCoroutine { cont ->
+        return suspendCancellableCoroutine { cont ->
             cont.resume(saveCollection(context, collection, lastUpdate))
         }
     }
@@ -311,7 +296,7 @@ object FileHelper {
         originalFileUri: Uri,
         targetFileUri: Uri
     ): Boolean {
-        return suspendCoroutine { cont ->
+        return suspendCancellableCoroutine { cont ->
             cont.resume(copyFile(context, originalFileUri, targetFileUri))
         }
     }
@@ -319,7 +304,7 @@ object FileHelper {
 
     /* Suspend function: Exports collection of stations as M3U file - local backup copy */
     suspend fun backupCollectionAsM3uSuspended(context: Context, collection: Collection) {
-        return suspendCoroutine { cont ->
+        return suspendCancellableCoroutine { cont ->
             Log.v(TAG, "Backing up collection as M3U - Thread: ${Thread.currentThread().name}")
             // create M3U string
             val m3uString: String = CollectionHelper.createM3uString(collection)
@@ -338,7 +323,7 @@ object FileHelper {
 
     /* Suspend function: Exports collection of stations as PLS file - local backup copy */
     suspend fun backupCollectionAsPlsSuspended(context: Context, collection: Collection) {
-        return suspendCoroutine { cont ->
+        return suspendCancellableCoroutine { cont ->
             Log.v(TAG, "Backing up collection as PLS - Thread: ${Thread.currentThread().name}")
             // create PLS string
             val plsString: String = CollectionHelper.createPlsString(collection)
@@ -417,16 +402,14 @@ object FileHelper {
 
     /* Reads InputStream from file uri and returns it as String */
     private fun readTextFileFromFile(context: Context): String {
-        // todo read https://commonsware.com/blog/2016/03/15/how-consume-content-uri.html
-        // https://developer.android.com/training/secure-file-sharing/retrieve-info
-
         // check if file exists
         val file = File(context.getExternalFilesDir(Keys.FOLDER_COLLECTION), Keys.COLLECTION_FILE)
         if (!file.exists() || !file.canRead()) {
             return String()
         }
         // read until last line reached
-        val stream: InputStream = file.inputStream()
+        val uri = Uri.fromFile(file)
+        val stream: InputStream = context.contentResolver.openInputStream(uri) ?: return String()
         val reader = BufferedReader(InputStreamReader(stream))
         val builder: StringBuilder = StringBuilder()
         reader.forEachLine {

app/src/main/java/com/michatec/radio/helpers/ImageHelper.kt

@@ -1,17 +1,3 @@
-/*
- * ImageHelper.kt
- * Implements the ImageHelper object
- * An ImageHelper provides helper methods for image related operations
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.content.Context
@@ -25,6 +11,7 @@ import com.michatec.radio.R
 import java.io.ByteArrayOutputStream
 import java.io.IOException
 import java.io.InputStream
+import androidx.core.graphics.createBitmap
 
 
 /*
@@ -98,7 +85,7 @@ object ImageHelper {
         }
 
         // create empty bitmap and canvas
-        val outputImage: Bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888)
+        val outputImage: Bitmap = createBitmap(size, size, Bitmap.Config.ARGB_8888)
         val imageCanvas = Canvas(outputImage)
 
         // draw square background

app/src/main/java/com/michatec/radio/helpers/ImportHelper.kt

@@ -1,42 +0,0 @@
-/*
- * ImportHelper.kt
- * Implements the ImportHelper object
- * A ImportHelper provides methods for integrating station files from Radio v3
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
-package com.michatec.radio.helpers
-
-import android.content.Context
-import com.michatec.radio.Keys
-import com.michatec.radio.core.Collection
-
-
-/*
- * ImportHelper object
- */
-object ImportHelper {
-
-
-    /* */
-    fun removeDefaultStationImageUris(context: Context) {
-        val collection: Collection = FileHelper.readCollection(context)
-        collection.stations.forEach { station ->
-            if (station.image == Keys.LOCATION_DEFAULT_STATION_IMAGE) {
-                station.image = String()
-            }
-            if (station.smallImage == Keys.LOCATION_DEFAULT_STATION_IMAGE) {
-                station.smallImage = String()
-            }
-        }
-        CollectionHelper.saveCollection(context, collection, async = false)
-    }
-
-}

app/src/main/java/com/michatec/radio/helpers/MarqueeSwitchPreference.kt

@@ -0,0 +1,25 @@
+package com.michatec.radio.helpers
+
+import android.content.Context
+import android.text.TextUtils
+import android.widget.TextView
+import androidx.preference.PreferenceViewHolder
+import androidx.preference.SwitchPreferenceCompat
+
+/*
+ * Custom SwitchPreferenceCompat that enables marquee (scrolling text) for the title
+ */
+class MarqueeSwitchPreference(context: Context) : SwitchPreferenceCompat(context) {
+
+    override fun onBindViewHolder(holder: PreferenceViewHolder) {
+        super.onBindViewHolder(holder)
+        val title = holder.findViewById(android.R.id.title) as? TextView
+        title?.apply {
+            ellipsize = TextUtils.TruncateAt.MARQUEE
+            setSingleLine(true)
+            marqueeRepeatLimit = -1 // Repeat indefinitely
+            isSelected = true       // Required for marquee to start
+            setHorizontallyScrolling(true)
+        }
+    }
+}

app/src/main/java/com/michatec/radio/helpers/NativeAudioProcessor.kt

@@ -0,0 +1,129 @@
+package com.michatec.radio.helpers
+
+import android.util.Log
+import androidx.annotation.OptIn
+import androidx.media3.common.C
+import androidx.media3.common.audio.AudioProcessor
+import androidx.media3.common.audio.AudioProcessor.AudioFormat
+import androidx.media3.common.audio.BaseAudioProcessor
+import androidx.media3.common.util.UnstableApi
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+
+@OptIn(UnstableApi::class)
+class NativeAudioProcessor : BaseAudioProcessor() {
+
+    companion object {
+        private const val TAG = "NativeAudioProcessor"
+        init {
+            try {
+                System.loadLibrary("dsp")
+            } catch (e: Exception) {
+                Log.e(TAG, "Failed to load dsp library", e)
+            }
+        }
+    }
+
+    private var directBuffer: ByteBuffer? = null
+
+    // ===== JNI =====
+    private external fun setSampleRate(sampleRate: Float)
+    private external fun setDrcEnabled(enabled: Boolean)
+    private external fun setReverbMix(mix: Float)
+    private external fun setEqFull(gains: FloatArray)
+    private external fun setBassBoost(gainDb: Float)
+    private external fun setStereoWidth(width: Float)
+    private external fun processAudioDirect(buf: ByteBuffer, size: Int)
+    private external fun getFftData(): FloatArray
+
+    // ===== API =====
+    fun enableDrc(enabled: Boolean) = setDrcEnabled(enabled)
+    fun setReverb(mix: Float) = setReverbMix(mix)
+    fun setEqAll(gains: FloatArray) = setEqFull(gains)
+    fun enableBassBoost(gainDb: Float) = setBassBoost(gainDb)
+    fun setWidth(width: Float) = setStereoWidth(width)
+
+    fun getVisualizer(): FloatArray {
+        val raw = getFftData()
+        val out = FloatArray(raw.size)
+        for (i in raw.indices) out[i] = kotlin.math.log10(1f + raw[i])
+        return out
+    }
+
+    // ===== AudioProcessor Overrides =====
+    override fun onConfigure(inputAudioFormat: AudioFormat): AudioFormat {
+        // Always try to support the input format if it is PCM 16-bit
+        if (inputAudioFormat.encoding != C.ENCODING_PCM_16BIT) {
+            Log.e(TAG, "Unsupported encoding: ${inputAudioFormat.encoding}")
+            throw AudioProcessor.UnhandledAudioFormatException(inputAudioFormat)
+        }
+        // Pass the actual sample rate to native
+        setSampleRate(inputAudioFormat.sampleRate.toFloat())
+        return inputAudioFormat
+    }
+
+    override fun queueInput(inputBuffer: ByteBuffer) {
+        val size = inputBuffer.remaining()
+        if (size == 0) return
+
+        val bufferToProcess: ByteBuffer
+        if (inputBuffer.isDirect) {
+            bufferToProcess = inputBuffer
+        } else {
+            if (directBuffer == null || directBuffer!!.capacity() < size) {
+                directBuffer = ByteBuffer.allocateDirect(size).order(ByteOrder.nativeOrder())
+            }
+            directBuffer!!.clear()
+            inputBuffer.position()
+            directBuffer!!.put(inputBuffer)
+            directBuffer!!.flip()
+            bufferToProcess = directBuffer!!
+        }
+
+        processAudioDirect(bufferToProcess, size)
+
+        val out = replaceOutputBuffer(size)
+        out.order(ByteOrder.nativeOrder())
+        bufferToProcess.position(0)
+        out.put(bufferToProcess)
+        out.flip()
+    }
+
+    override fun onReset() {
+        super.onReset()
+        directBuffer = null
+    }
+
+    // ===== Presets =====
+    fun setPresetRock() {
+        enableDrc(true)
+        setReverb(0.26f)
+        setWidth(1.1f)
+        setEqAll(floatArrayOf(2f, 1f, 0f, -1f, -1f, 0f, 1f, 2f, 2f, 3f))
+        enableBassBoost(0.9f)
+    }
+
+    fun setPresetPop() {
+        enableDrc(true)
+        setReverb(0.18f)
+        setWidth(1.05f)
+        setEqAll(floatArrayOf(0f, 1f, 1f, 1f, 0f, 0f, 1f, 2f, 2f, 1f))
+        enableBassBoost(0.6f)
+    }
+
+    fun setPresetJazz() {
+        enableDrc(false)
+        setReverb(0.15f)
+        setWidth(0.8f)
+        setEqAll(floatArrayOf(0f, 0f, 1f, 1f, 0f, 0f, 1f, 1f, 0f, 0f))
+        enableBassBoost(0.2f)
+    }
+
+    fun setPresetFlat() {
+        enableDrc(false)
+        setReverb(0f)
+        setWidth(1f)
+        setEqAll(FloatArray(10))
+        enableBassBoost(0f)
+    }
+}

app/src/main/java/com/michatec/radio/helpers/NetworkHelper.kt

@@ -1,17 +1,3 @@
-/*
- * NetworkHelper.kt
- * Implements the NetworkHelper object
- * A NetworkHelper provides helper methods for network related operations
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.content.Context
@@ -19,13 +5,13 @@ import android.net.ConnectivityManager
 import android.net.Network
 import android.util.Log
 import com.michatec.radio.Keys
+import kotlinx.coroutines.suspendCancellableCoroutine
 import java.net.HttpURLConnection
 import java.net.InetAddress
 import java.net.URL
 import java.net.UnknownHostException
 import java.util.*
 import kotlin.coroutines.resume
-import kotlin.coroutines.suspendCoroutine
 
 
 /*
@@ -105,7 +91,7 @@ object NetworkHelper {
 
     /* Suspend function: Detects content type (mime type) from given URL string - async using coroutine */
     suspend fun detectContentTypeSuspended(urlString: String): ContentType {
-        return suspendCoroutine { cont ->
+        return suspendCancellableCoroutine { cont ->
             cont.resume(detectContentType(urlString))
         }
     }
@@ -113,14 +99,14 @@ object NetworkHelper {
 
     /* Suspend function: Gets a random radio-browser.info api address - async using coroutine */
     suspend fun getRadioBrowserServerSuspended(): String {
-        return suspendCoroutine { cont ->
+        return suspendCancellableCoroutine { cont ->
             val serverAddress: String = try {
                 // get all available radio browser servers
                 val serverAddressList: Array<InetAddress> =
                     InetAddress.getAllByName(Keys.RADIO_BROWSER_API_BASE)
                 // select a random address
                 serverAddressList[Random().nextInt(serverAddressList.size)].canonicalHostName
-            } catch (e: UnknownHostException) {
+            } catch (_: UnknownHostException) {
                 Keys.RADIO_BROWSER_API_DEFAULT
             }
             PreferencesHelper.saveRadioBrowserApiAddress(serverAddress)
@@ -129,7 +115,7 @@ object NetworkHelper {
     }
 
 
-    /* Creates a http connection from given url string */
+    /* Creates an http connection from given url string */
     private fun createConnection(urlString: String, redirectCount: Int = 0): HttpURLConnection? {
         var connection: HttpURLConnection? = null
 

app/src/main/java/com/michatec/radio/helpers/PreferencesHelper.kt

@@ -1,21 +1,8 @@
-/*
- * PreferencesHelper.kt
- * Implements the PreferencesHelper object
- * A PreferencesHelper provides helper methods for the saving and loading values from shared preferences
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.content.Context
 import android.content.SharedPreferences
+import android.content.pm.PackageManager
 import android.util.Log
 import androidx.core.content.edit
 import androidx.preference.PreferenceManager
@@ -213,20 +200,6 @@ object PreferencesHelper {
     }
 
 
-    /* Checks if housekeeping work needs to be done - used usually in DownloadWorker "REQUEST_UPDATE_COLLECTION" */
-    fun isHouseKeepingNecessary(): Boolean {
-        return sharedPreferences.getBoolean(Keys.PREF_ONE_TIME_HOUSEKEEPING_NECESSARY, true)
-    }
-
-
-    /* Saves state of housekeeping */
-    fun saveHouseKeepingNecessaryState(state: Boolean = false) {
-        sharedPreferences.edit {
-            putBoolean(Keys.PREF_ONE_TIME_HOUSEKEEPING_NECESSARY, state)
-        }
-    }
-
-
     /* Load currently selected app theme */
     fun loadThemeSelection(): String {
         return sharedPreferences.getString(
@@ -236,23 +209,24 @@ object PreferencesHelper {
     }
 
 
-    /* Loads value of the option: Edit Stations */
+    /* Save currently selected app theme */
-    fun loadEditStationsEnabled(): Boolean {
+    fun saveThemeSelection(theme: String) {
-        return sharedPreferences.getBoolean(Keys.PREF_EDIT_STATIONS, true)
-    }
-
-
-    /* Saves value of the option: Edit Stations (only needed for migration) */
-    fun saveEditStationsEnabled(enabled: Boolean = false) {
         sharedPreferences.edit {
-            putBoolean(Keys.PREF_EDIT_STATIONS, enabled)
+            putString(Keys.PREF_THEME_SELECTION, theme)
         }
     }
 
 
+    /* Loads value of the option: Edit Stations */
+    fun loadEditStationsEnabled(context: Context): Boolean {
+        val defaultValue = !context.packageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)
+        return sharedPreferences.getBoolean(Keys.PREF_EDIT_STATIONS, defaultValue)
+    }
+
     /* Loads value of the option: Edit Station Streams */
-    fun loadEditStreamUrisEnabled(): Boolean {
+    fun loadEditStreamUrisEnabled(context: Context): Boolean {
-        return sharedPreferences.getBoolean(Keys.PREF_EDIT_STREAMS_URIS, true)
+        val defaultValue = !context.packageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)
+        return sharedPreferences.getBoolean(Keys.PREF_EDIT_STREAMS_URIS, defaultValue)
     }
 
 
@@ -276,8 +250,106 @@ object PreferencesHelper {
     fun downloadOverMobile(): Boolean {
         return sharedPreferences.getBoolean(
             Keys.PREF_DOWNLOAD_OVER_MOBILE,
-            Keys.DEFAULT_DOWNLOAD_OVER_MOBILE
+            false
         )
     }
 
+
+    /* Loads Bass Boost gain */
+    fun loadBassBoost(): Float {
+        return if (sharedPreferences.getBoolean(Keys.PREF_BASS_BOOST, false)) 1f else 0.0f
+    }
+
+
+    /* Loads Reverb mix */
+    fun loadReverb(): Float {
+        return if (sharedPreferences.getBoolean(Keys.PREF_REVERB, false)) 0.3f else 0.0f
+    }
+
+
+    /* Loads DRC enabled state */
+    fun loadDrcEnabled(): Boolean {
+        return sharedPreferences.getBoolean(Keys.PREF_DRC, false)
+    }
+
+    /* Loads all EQ bands (10 bands for full range) */
+    fun loadEqBand(band: Int): Int {
+        return when (band) {
+            0 -> sharedPreferences.getInt(Keys.PREF_EQ_LOW, 0)
+            1 -> sharedPreferences.getInt(Keys.PREF_EQ_BAND_1, 0)
+            2 -> sharedPreferences.getInt(Keys.PREF_EQ_BAND_2, 0)
+            3 -> sharedPreferences.getInt(Keys.PREF_EQ_BAND_3, 0)
+            4 -> sharedPreferences.getInt(Keys.PREF_EQ_BAND_4, 0)
+            5 -> sharedPreferences.getInt(Keys.PREF_EQ_BAND_5, 0)
+            6 -> sharedPreferences.getInt(Keys.PREF_EQ_MID, 0)
+            7 -> sharedPreferences.getInt(Keys.PREF_EQ_BAND_6, 0)
+            8 -> sharedPreferences.getInt(Keys.PREF_EQ_BAND_7, 0)
+            9 -> sharedPreferences.getInt(Keys.PREF_EQ_HIGH, 0)
+            else -> 0
+        }
+    }
+
+    /* Loads selected preset name */
+    fun loadSelectedPreset(): String {
+        return sharedPreferences.getString(Keys.PREF_PRESET_SELECTED, "") ?: ""
+    }
+
+    /* Saves selected preset name */
+    fun saveSelectedPreset(preset: String) {
+        sharedPreferences.edit { putString(Keys.PREF_PRESET_SELECTED, preset) }
+    }
+
+    /* Loads preset EQ band values */
+    fun loadPresetEqBand(band: Int): Int {
+        return when (band) {
+            0 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_0, 0)
+            1 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_1, 0)
+            2 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_2, 0)
+            3 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_3, 0)
+            4 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_4, 0)
+            5 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_5, 0)
+            6 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_6, 0)
+            7 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_7, 0)
+            8 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_8, 0)
+            9 -> sharedPreferences.getInt(Keys.PREF_PRESET_EQ_BAND_9, 0)
+            else -> 0
+        }
+    }
+
+    /* Loads preset Bass Boost */
+    fun loadPresetBassBoost(): Float {
+        return sharedPreferences.getFloat(Keys.PREF_PRESET_BASS_BOOST, 0f)
+    }
+
+    /* Loads preset Reverb */
+    fun loadPresetReverb(): Float {
+        return sharedPreferences.getFloat(Keys.PREF_PRESET_REVERB, 0f)
+    }
+
+    /* Loads preset DRC */
+    fun loadPresetDrc(): Boolean {
+        return sharedPreferences.getBoolean(Keys.PREF_PRESET_DRC, false)
+    }
+
+    /* Loads preset Stereo Width */
+    fun loadPresetStereoWidth(): Float {
+        return sharedPreferences.getFloat(Keys.PREF_PRESET_STEREO_WIDTH, 1f)
+    }
+
+    /* Resets Equalizer settings to default */
+    fun resetEqualizer() {
+        sharedPreferences.edit {
+            putInt(Keys.PREF_EQ_LOW, 0)
+            putInt(Keys.PREF_EQ_BAND_1, 0)
+            putInt(Keys.PREF_EQ_BAND_2, 0)
+            putInt(Keys.PREF_EQ_BAND_3, 0)
+            putInt(Keys.PREF_EQ_BAND_4, 0)
+            putInt(Keys.PREF_EQ_BAND_5, 0)
+            putInt(Keys.PREF_EQ_MID, 0)
+            putInt(Keys.PREF_EQ_BAND_6, 0)
+            putInt(Keys.PREF_EQ_BAND_7, 0)
+            putInt(Keys.PREF_EQ_HIGH, 0)
+        }
+    }
+
 }

app/src/main/java/com/michatec/radio/helpers/ShortcutHelper.kt

@@ -1,23 +1,8 @@
-/*
- * ShortcutHelper.kt
- * Implements the ShortcutHelper object
- * A ShortcutHelper creates and handles station shortcuts on the Home screen
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.content.Context
 import android.content.Intent
 import android.graphics.Bitmap
-import android.os.Build
 import android.widget.Toast
 import androidx.core.content.pm.ShortcutInfoCompat
 import androidx.core.content.pm.ShortcutManagerCompat
@@ -36,7 +21,6 @@ object ShortcutHelper {
 
     /* Places shortcut on Home screen */
     fun placeShortcut(context: Context, station: Station) {
-        // credit: https://medium.com/@BladeCoder/using-support-library-26-0-0-you-can-do-bb75911e01e8
         if (ShortcutManagerCompat.isRequestPinShortcutSupported(context)) {
             val shortcut: ShortcutInfoCompat = ShortcutInfoCompat.Builder(context, station.name)
                 .setShortLabel(station.name)
@@ -73,8 +57,8 @@ object ShortcutHelper {
     ): IconCompat {
         val stationImageBitmap: Bitmap =
             ImageHelper.getScaledStationImage(context, stationImage.toUri(), 192)
-        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+
-            IconCompat.createWithAdaptiveBitmap(
+        return IconCompat.createWithAdaptiveBitmap(
             ImageHelper.createSquareImage(
                 context,
                 stationImageBitmap,
@@ -83,17 +67,5 @@ object ShortcutHelper {
                 true
             )
         )
-        } else {
-            IconCompat.createWithAdaptiveBitmap(
-                ImageHelper.createSquareImage(
-                    context,
-                    stationImageBitmap,
-                    stationImageColor,
-                    192,
-                    false
-                )
-            )
     }
 }
-
-}

app/src/main/java/com/michatec/radio/helpers/UiHelper.kt

@@ -1,17 +1,3 @@
-/*
- * UiHelper.kt
- * Implements the UiHelper object
- * A UiHelper provides helper methods for User Interface related tasks
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.content.Context

app/src/main/java/com/michatec/radio/helpers/UpdateHelper.kt

@@ -1,17 +1,3 @@
-/*
- * UpdateHelper.kt
- * Implements the UpdateHelper class
- * A UpdateHelper provides methods to update a single station or the whole collection of stations
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.helpers
 
 import android.content.Context

app/src/main/java/com/michatec/radio/search/DirectInputCheck.kt

@@ -1,17 +1,3 @@
-/*
- * DirectInputCheck.kt
- * Implements the DirectInputCheck class
- * A DirectInputCheck checks if a station url is valid and returns station via a listener
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-23 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.search
 
 import android.content.Context

app/src/main/java/com/michatec/radio/search/RadioBrowserResult.kt

@@ -1,17 +1,3 @@
-/*
- * RadioBrowserResult.kt
- * Implements the RadioBrowserResult class
- * A RadioBrowserResult is the search result of a request to api.radio-browser.info
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.search
 
 import com.google.gson.annotations.Expose

app/src/main/java/com/michatec/radio/search/RadioBrowserSearch.kt

@@ -1,17 +1,3 @@
-/*
- * RadioBrowserSearch.kt
- * Implements the RadioBrowserSearch class
- * A RadioBrowserSearch performs searches on the radio-browser.info database
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.search
 
 import android.content.Context
@@ -129,7 +115,7 @@ class RadioBrowserSearch(private var radioBrowserSearchListener: RadioBrowserSea
 
 
     /* Listens for (positive) server responses to search requests */
-    private val responseListener: Response.Listener<JSONArray> = Response.Listener<JSONArray> { response ->
+    private val responseListener: Response.Listener<JSONArray> = Response.Listener { response ->
         if (response != null) {
             radioBrowserSearchListener.onRadioBrowserSearchResults(createRadioBrowserResult(response.toString()))
         }

app/src/main/java/com/michatec/radio/search/SearchResultAdapter.kt

@@ -1,37 +1,28 @@
-/*
- * SearchResultAdapter.kt
- * Implements the SearchResultAdapter class
- * A SearchResultAdapter is a custom adapter providing search result views for a RecyclerView
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.search
 
 import android.content.Context
 import android.media.AudioAttributes
 import android.media.AudioFocusRequest
 import android.media.AudioManager
-import android.os.Build
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
+import androidx.annotation.OptIn
 import androidx.appcompat.app.AppCompatActivity
 import androidx.lifecycle.DefaultLifecycleObserver
 import androidx.lifecycle.LifecycleOwner
-import androidx.media3.common.MediaItem
+import androidx.media3.common.*
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.exoplayer.DefaultRenderersFactory
 import androidx.media3.exoplayer.ExoPlayer
+import androidx.media3.exoplayer.audio.AudioSink
+import androidx.media3.exoplayer.audio.DefaultAudioSink
 import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.textview.MaterialTextView
 import com.michatec.radio.R
 import com.michatec.radio.core.Station
+import com.michatec.radio.helpers.NativeAudioProcessor
 
 
 /*
@@ -46,6 +37,7 @@ class SearchResultAdapter(
     private var exoPlayer: ExoPlayer? = null
     private var paused: Boolean = false
     private var isItemSelected: Boolean = false
+    private var nativeAudioProcessor = NativeAudioProcessor()
 
     /* Listener Interface */
     interface SearchResultAdapterListener {
@@ -106,7 +98,7 @@ class SearchResultAdapter(
         }
 
         // mark selected if necessary
-        val isSelected = selectedPosition == holder.adapterPosition
+        val isSelected = selectedPosition == holder.bindingAdapterPosition
         searchResultViewHolder.searchResultLayout.isSelected = isSelected
 
         // toggle text scrolling (marquee) if necessary
@@ -121,7 +113,7 @@ class SearchResultAdapter(
         searchResultViewHolder.searchResultLayout.setOnClickListener {
             // move marked position
             val previousSelectedPosition = selectedPosition
-            selectedPosition = holder.adapterPosition
+            selectedPosition = holder.bindingAdapterPosition
             notifyItemChanged(previousSelectedPosition)
             notifyItemChanged(selectedPosition)
 
@@ -133,7 +125,7 @@ class SearchResultAdapter(
                 resetSelection(false)
             } else {
                 // get the selected station from searchResults
-                val selectedStation = searchResults[holder.adapterPosition]
+                val selectedStation = searchResults[holder.bindingAdapterPosition]
                 // perform pre-playback here
                 performPrePlayback(searchResultViewHolder.searchResultLayout.context, selectedStation.getStreamUri())
                 // hand over station
@@ -153,6 +145,7 @@ class SearchResultAdapter(
     }
 
 
+    @OptIn(UnstableApi::class)
     private fun performPrePlayback(context: Context, streamUri: String) {
         if (streamUri.contains(".m3u8")) {
             // release previous player if it exists
@@ -166,8 +159,30 @@ class SearchResultAdapter(
             // release previous player if it exists
             stopPrePlayback()
 
-            // create a new instance of ExoPlayer
+            // set up audio attributes for the preview player
-            exoPlayer = ExoPlayer.Builder(context).build()
+            val audioAttributes = androidx.media3.common.AudioAttributes.Builder()
+                .setContentType(C.AUDIO_CONTENT_TYPE_MUSIC)
+                .setUsage(C.USAGE_MEDIA)
+                .build()
+
+            // Create a RenderersFactory that injects the NativeAudioProcessor
+            val renderersFactory = object : DefaultRenderersFactory(context) {
+                override fun buildAudioSink(
+                    context: Context,
+                    enableFloatOutput: Boolean,
+                    enableAudioTrackPlaybackParams: Boolean
+                ): AudioSink? {
+                    return DefaultAudioSink.Builder(context)
+                        .setAudioProcessors(arrayOf(nativeAudioProcessor))
+                        .build()
+                }
+            }
+
+            // create a new instance of ExoPlayer with focus handling
+            exoPlayer = ExoPlayer.Builder(context, renderersFactory)
+                .setAudioAttributes(audioAttributes, true)
+                .setHandleAudioBecomingNoisy(true)
+                .build()
 
             // create a MediaItem with the streamUri
             val mediaItem = MediaItem.fromUri(streamUri)
@@ -209,22 +224,16 @@ class SearchResultAdapter(
         // stop radio playback when one is active
         val audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
         val audioAttributes = AudioAttributes.Builder()
             .setUsage(AudioAttributes.USAGE_MEDIA)
             .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
             .build()
 
-            val focusRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT)
+        val focusRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN)
             .setAudioAttributes(audioAttributes)
             .build()
 
         audioManager.requestAudioFocus(focusRequest)
-        } else {
-            @Suppress("DEPRECATION")
-            // For older versions where AudioFocusRequest is not available
-            audioManager.requestAudioFocus(null, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT)
-        }
     }
 
 
@@ -246,7 +255,7 @@ class SearchResultAdapter(
     /*
      * Inner class: ViewHolder for a radio station search result
      */
-    private inner class SearchResultViewHolder(var searchResultLayout: View) :
+    private class SearchResultViewHolder(var searchResultLayout: View) :
         RecyclerView.ViewHolder(searchResultLayout) {
         val nameView: MaterialTextView = searchResultLayout.findViewById(R.id.station_name)
         val streamView: MaterialTextView = searchResultLayout.findViewById(R.id.station_url)

app/src/main/java/com/michatec/radio/ui/LayoutHolder.kt

@@ -1,23 +1,11 @@
-/*
- * LayoutHolder.kt
- * Implements the LayoutHolder class
- * A LayoutHolder hold references to the main views
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.ui
 
+import android.annotation.SuppressLint
 import android.content.ClipData
 import android.content.ClipboardManager
 import android.content.Context
 import android.content.Intent
+import android.content.pm.PackageManager
 import android.graphics.drawable.AnimatedVectorDrawable
 import android.os.Build
 import android.view.View
@@ -31,9 +19,11 @@ import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.constraintlayout.widget.Group
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
+import androidx.mediarouter.app.MediaRouteButton
 import androidx.recyclerview.widget.DefaultItemAnimator
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
+import com.google.android.gms.cast.framework.CastButtonFactory
 import com.google.android.material.bottomsheet.BottomSheetBehavior
 import com.google.android.material.snackbar.Snackbar
 import com.michatec.radio.Keys
@@ -53,30 +43,33 @@ data class LayoutHolder(var rootView: View) {
     /* Main class variables */
     var recyclerView: RecyclerView = rootView.findViewById(R.id.station_list)
     val layoutManager: LinearLayoutManager
-    private var bottomSheet: ConstraintLayout = rootView.findViewById(R.id.bottom_sheet)
+    private var bottomSheet: ConstraintLayout? = rootView.findViewById(R.id.bottom_sheet)
 
     //private var sheetMetadataViews: Group
-    private var sleepTimerRunningViews: Group = rootView.findViewById(R.id.sleep_timer_running_views)
+    private var sleepTimerRunningViews: Group? = rootView.findViewById(R.id.sleep_timer_running_views)
-    private var downloadProgressIndicator: ProgressBar = rootView.findViewById(R.id.download_progress_indicator)
+    private var downloadProgressIndicator: ProgressBar? = rootView.findViewById(R.id.download_progress_indicator)
-    private var stationImageView: ImageView = rootView.findViewById(R.id.station_icon)
+    private var stationImageView: ImageView? = rootView.findViewById(R.id.station_icon)
-    private var stationNameView: TextView = rootView.findViewById(R.id.player_station_name)
+    private var stationNameView: TextView? = rootView.findViewById(R.id.player_station_name)
-    private var metadataView: TextView = rootView.findViewById(R.id.player_station_metadata)
+    private var metadataView: TextView? = rootView.findViewById(R.id.player_station_metadata)
     var playButtonView: ImageButton = rootView.findViewById(R.id.player_play_button)
+    var playerPrevButtonView: ImageButton? = rootView.findViewById(R.id.player_prev_button)
+    var playerNextButtonView: ImageButton? = rootView.findViewById(R.id.player_next_button)
     private var bufferingIndicator: ProgressBar = rootView.findViewById(R.id.player_buffering_indicator)
-    private var sheetStreamingLinkHeadline: TextView = rootView.findViewById(R.id.sheet_streaming_link_headline)
+    private var sheetStreamingLinkHeadline: TextView? = rootView.findViewById(R.id.sheet_streaming_link_headline)
-    private var sheetStreamingLinkView: TextView = rootView.findViewById(R.id.sheet_streaming_link)
+    private var sheetStreamingLinkView: TextView? = rootView.findViewById(R.id.sheet_streaming_link)
-    private var sheetMetadataHistoryHeadline: TextView = rootView.findViewById(R.id.sheet_metadata_headline)
+    private var sheetMetadataHistoryHeadline: TextView? = rootView.findViewById(R.id.sheet_metadata_headline)
-    private var sheetMetadataHistoryView: TextView = rootView.findViewById(R.id.sheet_metadata_history)
+    private var sheetMetadataHistoryView: TextView? = rootView.findViewById(R.id.sheet_metadata_history)
-    private var sheetNextMetadataView: ImageButton = rootView.findViewById(R.id.sheet_next_metadata_button)
+    private var sheetNextMetadataView: ImageButton? = rootView.findViewById(R.id.sheet_next_metadata_button)
-    private var sheetPreviousMetadataView: ImageButton = rootView.findViewById(R.id.sheet_previous_metadata_button)
+    private var sheetPreviousMetadataView: ImageButton? = rootView.findViewById(R.id.sheet_previous_metadata_button)
-    private var sheetCopyMetadataButtonView: ImageButton = rootView.findViewById(R.id.copy_station_metadata_button)
+    private var sheetCopyMetadataButtonView: ImageButton? = rootView.findViewById(R.id.copy_station_metadata_button)
-    private var sheetShareLinkButtonView: ImageView = rootView.findViewById(R.id.sheet_share_link_button)
+    private var mediaRouteButton: MediaRouteButton? = rootView.findViewById(R.id.media_route_button)
-    private var sheetBitrateView: TextView = rootView.findViewById(R.id.sheet_bitrate_view)
+    private var sheetShareLinkButtonView: ImageView? = rootView.findViewById(R.id.sheet_share_link_button)
-    var sheetSleepTimerStartButtonView: ImageButton = rootView.findViewById(R.id.sleep_timer_start_button)
+    private var sheetBitrateView: TextView? = rootView.findViewById(R.id.sheet_bitrate_view)
-    var sheetSleepTimerCancelButtonView: ImageButton = rootView.findViewById(R.id.sleep_timer_cancel_button)
+    var sheetSleepTimerStartButtonView: ImageButton? = rootView.findViewById(R.id.sleep_timer_start_button)
+    var sheetSleepTimerCancelButtonView: ImageButton? = rootView.findViewById(R.id.sleep_timer_cancel_button)
     private var sheetSleepTimerRemainingTimeView: TextView = rootView.findViewById(R.id.sleep_timer_remaining_time)
     private var onboardingLayout: ConstraintLayout = rootView.findViewById(R.id.onboarding_layout)
-    private var bottomSheetBehavior: BottomSheetBehavior<ConstraintLayout> = BottomSheetBehavior.from(bottomSheet)
+    private var bottomSheetBehavior: BottomSheetBehavior<ConstraintLayout>? = bottomSheet?.let { BottomSheetBehavior.from(it) }
     private var metadataHistory: MutableList<String>
     private var metadataHistoryPosition: Int
     private var isBuffering: Boolean
@@ -96,80 +89,91 @@ data class LayoutHolder(var rootView: View) {
         recyclerView.itemAnimator = DefaultItemAnimator()
 
         // set up metadata history next and previous buttons
-        sheetPreviousMetadataView.setOnClickListener {
+        sheetPreviousMetadataView?.setOnClickListener {
             if (metadataHistory.isNotEmpty()) {
                 if (metadataHistoryPosition > 0) {
                     metadataHistoryPosition -= 1
                 } else {
                     metadataHistoryPosition = metadataHistory.size - 1
                 }
-                sheetMetadataHistoryView.text = metadataHistory[metadataHistoryPosition]
+                sheetMetadataHistoryView?.text = metadataHistory[metadataHistoryPosition]
             }
         }
-        sheetNextMetadataView.setOnClickListener {
+        sheetNextMetadataView?.setOnClickListener {
             if (metadataHistory.isNotEmpty()) {
                 if (metadataHistoryPosition < metadataHistory.size - 1) {
                     metadataHistoryPosition += 1
                 } else {
                     metadataHistoryPosition = 0
                 }
-                sheetMetadataHistoryView.text = metadataHistory[metadataHistoryPosition]
+                sheetMetadataHistoryView?.text = metadataHistory[metadataHistoryPosition]
             }
         }
-        sheetMetadataHistoryView.setOnLongClickListener {
+        sheetMetadataHistoryView?.setOnLongClickListener {
             copyMetadataHistoryToClipboard()
             return@setOnLongClickListener true
         }
-        sheetMetadataHistoryHeadline.setOnLongClickListener {
+        sheetMetadataHistoryHeadline?.setOnLongClickListener {
             copyMetadataHistoryToClipboard()
             return@setOnLongClickListener true
         }
 
+        // Set up MediaRouteButton (Google Cast)
+        mediaRouteButton?.let {
+            CastButtonFactory.setUpMediaRouteButton(rootView.context, it)
+        }
+
         // set layout for player
         setupBottomSheet()
     }
 
 
     /* Updates the player views */
+    @SuppressLint("DefaultLocale")
     fun updatePlayerViews(context: Context, station: Station, isPlaying: Boolean) {
-
-        // set default metadata views, when playback has stopped
         if (!isPlaying) {
-            metadataView.text = station.name
+            metadataView?.text = station.name
-            sheetMetadataHistoryView.text = station.name
+            sheetMetadataHistoryView?.text = station.name
-//            sheetMetadataHistoryView.isSelected = true
         }
 
         // update name
-        stationNameView.text = station.name
+        stationNameView?.text = station.name
 
         // toggle text scrolling (marquee) if necessary
-        stationNameView.isSelected = isPlaying
+        stationNameView?.isSelected = isPlaying
 
         // reduce the shadow left and right because of scrolling (Marquee)
-        stationNameView.setFadingEdgeLength(8)
+        stationNameView?.setFadingEdgeLength(8)
 
         // update cover
         if (station.imageColor != -1) {
-            stationImageView.setBackgroundColor(station.imageColor)
+            stationImageView?.setBackgroundColor(station.imageColor)
         }
-        stationImageView.setImageBitmap(ImageHelper.getStationImage(context, station.smallImage))
+        stationImageView?.setImageBitmap(ImageHelper.getStationImage(context, station.smallImage))
-        stationImageView.contentDescription = "${context.getString(R.string.descr_player_station_image)}: ${station.name}"
+        stationImageView?.contentDescription = "${context.getString(R.string.descr_player_station_image)}: ${station.name}"
 
         // update streaming link
-        sheetStreamingLinkView.text = station.getStreamUri()
+        sheetStreamingLinkView?.text = station.getStreamUri()
 
         val bitrateText: CharSequence = if (station.codec.isNotEmpty()) {
             if (station.bitrate == 0) {
                 // show only the codec when the bitrate is at "0" from radio-browser.info API
                 station.codec
             } else {
+                val kiloBytesPerSecond = station.bitrate / 8F
+                val dataRateString = if (kiloBytesPerSecond >= 1000) {
+                    String.format("%.2f mb/s", kiloBytesPerSecond / 1000F)
+                } else {
+                    String.format("%.0f kb/s", kiloBytesPerSecond)
+                }
                 // show the bitrate and codec if the result is available in the radio-browser.info API
                 buildString {
                     append(station.codec)
                     append(" | ")
                     append(station.bitrate)
                     append("kbps")
+                    append(" | ")
+                    append(dataRateString)
                 }
             }
         } else {
@@ -178,50 +182,50 @@ data class LayoutHolder(var rootView: View) {
         }
 
         // update bitrate
-        sheetBitrateView.text = bitrateText
+        sheetBitrateView?.text = bitrateText
 
         // update click listeners
-        sheetStreamingLinkHeadline.setOnClickListener {
+        sheetStreamingLinkHeadline?.setOnClickListener {
             copyToClipboard(
                 context,
-                sheetStreamingLinkView.text
+                sheetStreamingLinkView?.text ?: ""
             )
         }
-        sheetStreamingLinkView.setOnClickListener {
+        sheetStreamingLinkView?.setOnClickListener {
             copyToClipboard(
                 context,
-                sheetStreamingLinkView.text
+                sheetStreamingLinkView?.text ?: ""
             )
         }
-        sheetMetadataHistoryHeadline.setOnClickListener {
+        sheetMetadataHistoryHeadline?.setOnClickListener {
             copyToClipboard(
                 context,
-                sheetMetadataHistoryView.text
+                sheetMetadataHistoryView?.text ?: ""
             )
         }
-        sheetMetadataHistoryView.setOnClickListener {
+        sheetMetadataHistoryView?.setOnClickListener {
             copyToClipboard(
                 context,
-                sheetMetadataHistoryView.text
+                sheetMetadataHistoryView?.text ?: ""
             )
         }
-        sheetCopyMetadataButtonView.setOnClickListener {
+        sheetCopyMetadataButtonView?.setOnClickListener {
             copyToClipboard(
                 context,
-                sheetMetadataHistoryView.text
+                sheetMetadataHistoryView?.text ?: ""
             )
         }
-        sheetBitrateView.setOnClickListener {
+        sheetBitrateView?.setOnClickListener {
             copyToClipboard(
                 context,
-                sheetBitrateView.text
+                sheetBitrateView?.text ?: ""
             )
         }
-        sheetShareLinkButtonView.setOnClickListener {
+        sheetShareLinkButtonView?.setOnClickListener {
             val share = Intent.createChooser(Intent().apply {
                 action = Intent.ACTION_SEND
-                putExtra(Intent.EXTRA_TITLE, stationNameView.text)
+                putExtra(Intent.EXTRA_TITLE, stationNameView?.text)
-                putExtra(Intent.EXTRA_TEXT, sheetStreamingLinkView.text)
+                putExtra(Intent.EXTRA_TEXT, sheetStreamingLinkView?.text ?: "")
                 type = "text/plain"
             }, null)
             context.startActivity(share)
@@ -254,11 +258,11 @@ data class LayoutHolder(var rootView: View) {
     fun updateMetadata(metadataHistoryList: MutableList<String>?) {
         if (!metadataHistoryList.isNullOrEmpty()) {
             metadataHistory = metadataHistoryList
-            if (metadataHistory.last() != metadataView.text) {
+            if (metadataHistory.last() != metadataView?.text) {
                 metadataHistoryPosition = metadataHistory.size - 1
                 val metadataString = metadataHistory[metadataHistoryPosition]
-                metadataView.text = metadataString
+                metadataView?.text = metadataString
-                sheetMetadataHistoryView.text = metadataString
+                sheetMetadataHistoryView?.text = metadataString
             }
         }
     }
@@ -268,14 +272,16 @@ data class LayoutHolder(var rootView: View) {
     fun updateSleepTimer(context: Context, timeRemaining: Long = 0L) {
         when (timeRemaining) {
             0L -> {
-                sleepTimerRunningViews.isGone = true
+                sleepTimerRunningViews?.isGone = true
+                sheetSleepTimerRemainingTimeView.isVisible = false
             }
             else -> {
-                sleepTimerRunningViews.isVisible = true
+                sleepTimerRunningViews?.isVisible = true
+                sheetSleepTimerRemainingTimeView.isVisible = true
                 val sleepTimerTimeRemaining = DateTimeHelper.convertToHoursMinutesSeconds(timeRemaining)
                 sheetSleepTimerRemainingTimeView.text = sleepTimerTimeRemaining
                 sheetSleepTimerRemainingTimeView.contentDescription = "${context.getString(R.string.descr_expanded_player_sleep_timer_remaining_time)}: $sleepTimerTimeRemaining"
-                stationNameView.isSelected = false
+                stationNameView?.isSelected = false
             }
         }
     }
@@ -287,12 +293,10 @@ data class LayoutHolder(var rootView: View) {
             playButtonView.setImageResource(R.drawable.ic_audio_waves_animated)
             val animatedVectorDrawable = playButtonView.drawable as? AnimatedVectorDrawable
             animatedVectorDrawable?.start()
-            sheetSleepTimerStartButtonView.isVisible = true
+            sheetSleepTimerStartButtonView?.isVisible = true
-            // bufferingIndicator.isVisible = false
         } else {
             playButtonView.setImageResource(R.drawable.ic_player_play_symbol_42dp)
-            sheetSleepTimerStartButtonView.isVisible = false
+            sheetSleepTimerStartButtonView?.isVisible = false
-            // bufferingIndicator.isVisible = isBuffering
         }
     }
 
@@ -303,23 +307,11 @@ data class LayoutHolder(var rootView: View) {
         isBuffering = buffering
     }
 
-
-    /* Toggles visibility of player depending on playback state - hiding it when playback is stopped (not paused or playing) */
-//    fun togglePlayerVisibility(context: Context, playbackState: Int): Boolean {
-//        when (playbackState) {
-//            PlaybackStateCompat.STATE_STOPPED -> return hidePlayer(context)
-//            PlaybackStateCompat.STATE_NONE -> return hidePlayer(context)
-//            PlaybackStateCompat.STATE_ERROR -> return hidePlayer(context)
-//            else -> return showPlayer(context)
-//        }
-//    }
-
-
     /* Toggles visibility of the download progress indicator */
     fun toggleDownloadProgressIndicator() {
         when (PreferencesHelper.loadActiveDownloads()) {
-            Keys.ACTIVE_DOWNLOADS_EMPTY -> downloadProgressIndicator.isGone = true
+            Keys.ACTIVE_DOWNLOADS_EMPTY -> downloadProgressIndicator?.isGone = true
-            else -> downloadProgressIndicator.isVisible = true
+            else -> downloadProgressIndicator?.isVisible = true
         }
     }
 
@@ -340,27 +332,27 @@ data class LayoutHolder(var rootView: View) {
 
     /* Initiates the rotation animation of the play button  */
     fun animatePlaybackButtonStateTransition(context: Context, isPlaying: Boolean) {
-        when (isPlaying) {
+        if (context.packageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
-            true -> {
+            // TV: Toggle play button immediately for snappier feel
-                val rotateClockwise = AnimationUtils.loadAnimation(context, R.anim.rotate_clockwise_slow)
+            togglePlayButton(isPlaying)
-                rotateClockwise.setAnimationListener(createAnimationListener(true))
+        } else {
-                playButtonView.startAnimation(rotateClockwise)
+            // Handy/Tablet: Rotate the play button
-            }
+            val rotateAnimation = AnimationUtils.loadAnimation(context, if (isPlaying) R.anim.rotate_clockwise_slow else R.anim.rotate_counterclockwise_fast)
-            false -> {
+            rotateAnimation.setAnimationListener(createAnimationListener(isPlaying))
-                val rotateCounterClockwise = AnimationUtils.loadAnimation(context, R.anim.rotate_counterclockwise_fast)
+            playButtonView.startAnimation(rotateAnimation)
-                rotateCounterClockwise.setAnimationListener(createAnimationListener(false))
-                playButtonView.startAnimation(rotateCounterClockwise)
-            }
-
         }
     }
 
 
     /* Shows player */
     fun showPlayer(context: Context): Boolean {
+        if (bottomSheetBehavior != null) {
             UiHelper.setViewMargins(context, recyclerView, 0, 0, 0, Keys.BOTTOM_SHEET_PEEK_HEIGHT)
-        if (bottomSheetBehavior.state == BottomSheetBehavior.STATE_HIDDEN && onboardingLayout.visibility == View.GONE) {
+            if (bottomSheetBehavior?.state == BottomSheetBehavior.STATE_HIDDEN && onboardingLayout.isGone) {
-            bottomSheetBehavior.state = BottomSheetBehavior.STATE_COLLAPSED
+                bottomSheetBehavior?.state = BottomSheetBehavior.STATE_COLLAPSED
+            }
+        } else {
+            UiHelper.setViewMargins(context, recyclerView, 0, 0, 0, 0)
         }
         return true
     }
@@ -369,15 +361,15 @@ data class LayoutHolder(var rootView: View) {
     /* Hides player */
     private fun hidePlayer(context: Context): Boolean {
         UiHelper.setViewMargins(context, recyclerView, 0, 0, 0, 0)
-        bottomSheetBehavior.state = BottomSheetBehavior.STATE_HIDDEN
+        bottomSheetBehavior?.state = BottomSheetBehavior.STATE_HIDDEN
         return true
     }
 
 
     /* Minimizes player sheet if expanded */
     fun minimizePlayerIfExpanded(): Boolean {
-        return if (bottomSheetBehavior.state == BottomSheetBehavior.STATE_EXPANDED) {
+        return if (bottomSheetBehavior?.state == BottomSheetBehavior.STATE_EXPANDED) {
-            bottomSheetBehavior.state = BottomSheetBehavior.STATE_COLLAPSED
+            bottomSheetBehavior?.state = BottomSheetBehavior.STATE_COLLAPSED
             true
         } else {
             false
@@ -390,7 +382,7 @@ data class LayoutHolder(var rootView: View) {
         return object : Animation.AnimationListener {
             override fun onAnimationStart(animation: Animation) {}
             override fun onAnimationEnd(animation: Animation) {
-                // set up button symbol and playback indicator afterwards
+                // set up button symbol and playback indicator afterward
                 togglePlayButton(isPlaying)
             }
 
@@ -401,9 +393,10 @@ data class LayoutHolder(var rootView: View) {
 
     /* Sets up the player (BottomSheet) */
     private fun setupBottomSheet() {
+        if (bottomSheetBehavior != null) {
             // show / hide the small player
-        bottomSheetBehavior.state = BottomSheetBehavior.STATE_COLLAPSED
+            bottomSheetBehavior?.state = BottomSheetBehavior.STATE_COLLAPSED
-        bottomSheetBehavior.addBottomSheetCallback(object :
+            bottomSheetBehavior?.addBottomSheetCallback(object :
                 BottomSheetBehavior.BottomSheetCallback() {
                 override fun onSlide(view: View, slideOffset: Float) {
                 }
@@ -420,19 +413,20 @@ data class LayoutHolder(var rootView: View) {
                 }
             })
             // toggle collapsed state on tap
-        bottomSheet.setOnClickListener { toggleBottomSheetState() }
+            bottomSheet?.setOnClickListener { toggleBottomSheetState() }
-        stationImageView.setOnClickListener { toggleBottomSheetState() }
+            stationImageView?.setOnClickListener { toggleBottomSheetState() }
-        stationNameView.setOnClickListener { toggleBottomSheetState() }
+            stationNameView?.setOnClickListener { toggleBottomSheetState() }
-        metadataView.setOnClickListener { toggleBottomSheetState() }
+            metadataView?.setOnClickListener { toggleBottomSheetState() }
+        }
     }
 
 
     /* Toggle expanded/collapsed state of bottom sheet */
     private fun toggleBottomSheetState() {
-        when (bottomSheetBehavior.state) {
+        when (bottomSheetBehavior?.state) {
-            BottomSheetBehavior.STATE_COLLAPSED -> bottomSheetBehavior.state =
+            BottomSheetBehavior.STATE_COLLAPSED -> bottomSheetBehavior?.state =
                 BottomSheetBehavior.STATE_EXPANDED
-            else -> bottomSheetBehavior.state = BottomSheetBehavior.STATE_COLLAPSED
+            else -> bottomSheetBehavior?.state = BottomSheetBehavior.STATE_COLLAPSED
         }
     }
 
@@ -440,7 +434,7 @@ data class LayoutHolder(var rootView: View) {
     /*
      * Inner class: Custom LinearLayoutManager
      */
-    private inner class CustomLayoutManager(context: Context) :
+    private class CustomLayoutManager(context: Context) :
         LinearLayoutManager(context, VERTICAL, false) {
         override fun supportsPredictiveItemAnimations(): Boolean {
             return true

app/src/main/java/com/michatec/radio/ui/PlayerState.kt

@@ -1,17 +1,3 @@
-/*
- * PlayerState.kt
- * Implements the PlayerState class
- * A PlayerState holds parameters describing the state of the player part of the UI
- *
- * This file is part of
- * TRANSISTOR - Radio App for Android
- *
- * Copyright (c) 2015-22 - Y20K.org
- * Licensed under the MIT-License
- * http://opensource.org/licenses/MIT
- */
-
-
 package com.michatec.radio.ui
 
 import android.os.Parcelable

app/src/main/res/color/selector_card_station_stroke.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@color/list_card_stroke_focused" android:state_focused="true" />
+    <item android:color="@color/list_card_stroke_background" />
+</selector>

app/src/main/res/drawable/ic_codeberg_24dp.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24.0"
-    android:viewportHeight="24.0">
-  <path
-      android:fillColor="@color/icon_default"
-      android:pathData="m11.999,2.623c-5.54,0 -9.999,4.462 -9.999,10.001 -0,1.878 0.529,3.721 1.528,5.313l8.336,-10.778c0.06,-0.077 0.209,-0.077 0.27,0l3.482,4.502h-2.494l0.054,0.199h2.594l0.736,0.949h-3.062l0.086,0.311h3.217l0.647,0.836h-3.631l0.113,0.402h3.827l0.579,0.745h-4.198l0.137,0.49h4.438l0.508,0.655h-4.764l0.152,0.542h5.031l0.468,0.606h-5.33l0.152,0.542h5.598c0.998,-1.592 1.528,-3.435 1.528,-5.313 0,-5.54 -4.462,-10.001 -10.001,-10.001zM15.044,18.543 L15.196,19.085h4.438c0.145,-0.171 0.294,-0.361 0.428,-0.542zM15.365,19.69 L15.515,20.232h2.969c0.194,-0.166 0.405,-0.357 0.594,-0.542zM15.684,20.838 L15.836,21.377h1.003c0.296,-0.17 0.571,-0.343 0.868,-0.539z" />
-</vector>

app/src/main/res/drawable/ic_refresh_24dp.xml

@@ -0,0 +1,17 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="@color/icon_default"
+        android:pathData="M17.65,6.35C16.2,4.9 14.21,4 12,4
+                          7.58,4 4,7.58 4,12h2
+                          c0,-3.31 2.69,-6 6,-6
+                          1.66,0 3.14,0.69 4.22,1.78L13,11h7V4l-2.35,2.35z
+                          M6.35,17.65C7.8,19.1 9.79,20 12,20
+                          c4.42,0 8,-3.58 8,-8h-2
+                          c0,3.31 -2.69,6 -6,6
+                          -1.66,0 -3.14,-0.69 -4.22,-1.78L11,13H4v7l2.35,-2.35z"/>
+</vector>

app/src/main/res/drawable/selector_card_station_background.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@color/search_result_background_selected" android:state_focused="true" />
+    <item android:drawable="@android:color/transparent" />
+</selector>

app/src/main/res/drawable/selector_card_station_stroke.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@color/list_card_stroke_focused" android:state_focused="true" />
+    <item android:color="@color/list_card_stroke_background" />
+</selector>

app/src/main/res/drawable/selector_generic_button_focus.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_focused="true">
+        <shape android:shape="rectangle">
+            <solid android:color="#80FFFFFF" />
+            <corners android:radius="8dp" />
+            <stroke android:width="3dp" android:color="@color/default_neutral_white" />
+        </shape>
+    </item>
+    <item android:drawable="@android:color/transparent" />
+</selector>

app/src/main/res/drawable/selector_search_result_item.xml

@@ -1,8 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <!-- View is "selected" -->
+    <!-- View is "selected" or "focused" (for TV) -->
     <item android:drawable="@drawable/shape_search_result_item_selected" android:state_selected="true" />
+    <item android:drawable="@drawable/shape_search_result_item_selected" android:state_focused="true" />
 
     <!-- Default state. -->
     <item android:drawable="@drawable/shape_search_result_item" />

app/src/main/res/drawable/shape_player_button_small_selected.xml

@@ -1,8 +1,8 @@
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="oval">
     <stroke
-        android:width="2dp"
+        android:width="4dp"
-        android:color="@color/default_neutral_lighter" />
+        android:color="@color/default_neutral_white" />
     <size
         android:width="56dp"
         android:height="56dp" />

app/src/main/res/drawable/splash_screen.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@color/splashBackgroundColor" />
+    <item
+        android:width="160dp"
+        android:height="160dp"
+        android:gravity="center"
+        android:drawable="@mipmap/ic_launcher" />
+</layer-list>

app/src/main/res/layout-television/bottom_sheet_playback_controls.xml

@@ -0,0 +1,135 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/bottom_sheet"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="@drawable/shape_player_sheet_background"
+    android:padding="24dp">
+
+    <com.google.android.material.imageview.ShapeableImageView
+        android:id="@+id/station_icon"
+        android:layout_width="120dp"
+        android:layout_height="120dp"
+        android:background="@drawable/shape_cover_small"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:shapeAppearanceOverlay="@style/RoundedCorners"
+        app:srcCompat="@drawable/ic_default_station_image_72dp" />
+
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/player_station_name"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="24dp"
+        android:textAppearance="@style/TextAppearance.Material3.HeadlineMedium"
+        android:textColor="@color/player_sheet_text_main"
+        android:textStyle="bold"
+        app:layout_constraintEnd_toStartOf="@+id/player_play_button"
+        app:layout_constraintStart_toEndOf="@+id/station_icon"
+        app:layout_constraintTop_toTopOf="@+id/station_icon"
+        tools:text="Station Name" />
+
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/player_station_metadata"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:textAppearance="@style/TextAppearance.Material3.BodyLarge"
+        android:textColor="@color/player_sheet_text_main"
+        app:layout_constraintEnd_toEndOf="@+id/player_station_name"
+        app:layout_constraintStart_toStartOf="@+id/player_station_name"
+        app:layout_constraintTop_toBottomOf="@+id/player_station_name"
+        tools:text="Metadata Info" />
+
+    <ImageButton
+        android:id="@+id/player_play_button"
+        android:layout_width="80dp"
+        android:layout_height="80dp"
+        android:background="@drawable/selector_play_button"
+        android:focusable="true"
+        android:scaleType="center"
+        app:layout_constraintBottom_toBottomOf="@+id/station_icon"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="@+id/station_icon"
+        app:srcCompat="@drawable/ic_player_play_symbol_42dp" />
+
+    <LinearLayout
+        android:id="@+id/detailed_controls_row"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="32dp"
+        android:gravity="center_vertical"
+        android:orientation="horizontal"
+        app:layout_constraintTop_toBottomOf="@+id/station_icon">
+
+        <ImageButton
+            android:id="@+id/sheet_previous_metadata_button"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:background="@drawable/selector_generic_button_focus"
+            android:focusable="true"
+            app:srcCompat="@drawable/ic_chevron_left_24dp" />
+
+        <com.google.android.material.textview.MaterialTextView
+            android:id="@+id/sheet_metadata_history"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:layout_marginHorizontal="16dp"
+            android:textAlignment="center"
+            android:textAppearance="@style/TextAppearance.Material3.BodyMedium"
+            android:textColor="@color/player_sheet_text_main"
+            tools:text="Metadata History" />
+
+        <ImageButton
+            android:id="@+id/sheet_next_metadata_button"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:background="@drawable/selector_generic_button_focus"
+            android:focusable="true"
+            app:srcCompat="@drawable/ic_chevron_right_24dp" />
+
+        <ImageButton
+            android:id="@+id/copy_station_metadata_button"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:layout_marginStart="16dp"
+            android:background="@drawable/selector_generic_button_focus"
+            android:focusable="true"
+            app:srcCompat="@drawable/ic_copy_content_24dp" />
+
+        <ImageButton
+            android:id="@+id/sleep_timer_start_button"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:layout_marginStart="16dp"
+            android:background="@drawable/selector_generic_button_focus"
+            android:focusable="true"
+            app:srcCompat="@drawable/ic_sleep_timer_24dp" />
+
+        <ImageButton
+            android:id="@+id/sleep_timer_cancel_button"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:layout_marginStart="8dp"
+            android:background="@drawable/selector_generic_button_focus"
+            android:focusable="true"
+            android:visibility="gone"
+            app:srcCompat="@drawable/ic_clear_24dp" />
+
+    </LinearLayout>
+
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/sleep_timer_remaining_time"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:textAppearance="@style/TextAppearance.Material3.LabelLarge"
+        android:textColor="@color/player_sheet_text_main"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/detailed_controls_row"
+        tools:text="15:00" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout-television/dialog_add_station.xml

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/station_list"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:clipToPadding="false"
+        android:paddingBottom="16dp"
+        android:nextFocusRight="@id/dialog_negative_button"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <androidx.constraintlayout.widget.Guideline
+        android:id="@+id/guideline"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        app:layout_constraintGuide_percent="0.7" />
+
+    <LinearLayout
+        android:id="@+id/dialog_button_container"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="16dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/guideline"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <Button
+            android:id="@+id/dialog_positive_button"
+            style="@style/Widget.Material3.Button"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:nextFocusLeft="@id/station_list"
+            android:text="@string/dialog_find_station_button_add" />
+
+        <Button
+            android:id="@+id/dialog_negative_button"
+            style="@style/Widget.Material3.Button.TextButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:nextFocusLeft="@id/station_list"
+            android:text="@string/dialog_generic_button_cancel" />
+
+    </LinearLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout-television/dialog_find_station.xml

@@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp">
+
+    <androidx.appcompat.widget.SearchView
+        android:id="@+id/station_search_box_view"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:focusable="true"
+        android:focusableInTouchMode="true"
+        android:clickable="true"
+        android:nextFocusRight="@id/dialog_negative_button"
+        android:nextFocusDown="@id/station_search_result_list"
+        app:iconifiedByDefault="false"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:queryHint="@string/dialog_find_station_hint" />
+
+    <ProgressBar
+        android:id="@+id/search_request_progress_indicator"
+        style="?android:attr/progressBarStyleHorizontal"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:indeterminate="true"
+        android:visibility="gone"
+        app:layout_constraintEnd_toEndOf="@+id/station_search_box_view"
+        app:layout_constraintStart_toStartOf="@+id/station_search_box_view"
+        app:layout_constraintTop_toBottomOf="@+id/station_search_box_view" />
+
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/no_results_text_view"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/dialog_find_station_no_results"
+        android:textAppearance="@style/TextAppearance.Material3.BodyLarge"
+        android:visibility="gone"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/search_request_progress_indicator" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/station_search_result_list"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:layout_marginTop="8dp"
+        android:clipToPadding="false"
+        android:paddingBottom="16dp"
+        android:nextFocusRight="@id/dialog_negative_button"
+        android:nextFocusUp="@id/station_search_box_view"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/guideline"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/no_results_text_view" />
+
+    <androidx.constraintlayout.widget.Guideline
+        android:id="@+id/guideline"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        app:layout_constraintGuide_percent="0.7" />
+
+    <!-- Right side: Actions -->
+    <LinearLayout
+        android:id="@+id/dialog_button_container"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="16dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/guideline"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <Button
+            android:id="@+id/dialog_positive_button"
+            style="@style/Widget.Material3.Button"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:nextFocusUp="@id/station_search_box_view"
+            android:nextFocusLeft="@id/station_search_result_list"
+            android:text="@string/dialog_find_station_button_add" />
+
+        <Button
+            android:id="@+id/dialog_negative_button"
+            style="@style/Widget.Material3.Button.TextButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:nextFocusLeft="@id/station_search_result_list"
+            android:text="@string/dialog_generic_button_cancel" />
+
+    </LinearLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout-television/dialog_generic_with_details.xml

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="800dp"
+    android:layout_height="wrap_content"
+    android:padding="24dp">
+
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/dialog_message"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/dialog_error_message_default"
+        android:textAppearance="@style/TextAppearance.Material3.HeadlineSmall"
+        android:textColor="@color/text_default"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="@string/dialog_error_message_default" />
+
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/dialog_details_link"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:focusable="true"
+        android:clickable="true"
+        android:background="?attr/selectableItemBackground"
+        android:padding="8dp"
+        android:text="@string/dialog_generic_details_button"
+        android:textAppearance="@style/TextAppearance.Material3.LabelLarge"
+        android:textColor="@color/text_default"
+        android:visibility="gone"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/dialog_message"
+        tools:text="@string/dialog_generic_details_button" />
+
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/dialog_details"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="12dp"
+        android:focusable="true"
+        android:clickable="true"
+        android:scrollbars="vertical"
+        android:text="@string/dialog_opml_import_details_default"
+        android:textAppearance="@style/TextAppearance.Material3.BodyLarge"
+        android:textColor="@color/text_default"
+        android:textIsSelectable="true"
+        android:visibility="gone"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/dialog_details_link"
+        tools:text="@string/dialog_opml_import_details_default" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout-television/dialog_preset_selection.xml

@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="24dp">
+
+    <TextView
+        android:id="@+id/dialog_title"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/pref_preset_selection_title"
+        android:textSize="24sp"
+        android:textStyle="bold"
+        android:paddingBottom="16dp" />
+
+    <RadioGroup
+        android:id="@+id/preset_radio_group"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <RadioButton
+            android:id="@+id/radio_preset_none"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_none"
+            android:textSize="20sp"
+            android:padding="12dp"
+            android:focusable="true"
+            android:clickable="true" />
+
+        <RadioButton
+            android:id="@+id/radio_preset_rock"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_rock"
+            android:textSize="20sp"
+            android:padding="12dp"
+            android:focusable="true"
+            android:clickable="true" />
+
+        <RadioButton
+            android:id="@+id/radio_preset_pop"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_pop"
+            android:textSize="20sp"
+            android:padding="12dp"
+            android:focusable="true"
+            android:clickable="true" />
+
+        <RadioButton
+            android:id="@+id/radio_preset_jazz"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_jazz"
+            android:textSize="20sp"
+            android:padding="12dp"
+            android:focusable="true"
+            android:clickable="true" />
+
+        <RadioButton
+            android:id="@+id/radio_preset_flat"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_flat"
+            android:textSize="20sp"
+            android:padding="12dp"
+            android:focusable="true"
+            android:clickable="true" />
+
+    </RadioGroup>
+
+</LinearLayout>

app/src/main/res/layout-television/dialog_theme_selection.xml

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="24dp">
+
+    <TextView
+        android:id="@+id/dialog_title"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/pref_theme_selection_title"
+        android:textSize="24sp"
+        android:textStyle="bold"
+        android:paddingBottom="16dp" />
+
+    <RadioGroup
+        android:id="@+id/theme_radio_group"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <RadioButton
+            android:id="@+id/radio_theme_follow_system"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_theme_selection_mode_device_default"
+            android:textSize="20sp"
+            android:padding="12dp"
+            android:focusable="true"
+            android:clickable="true" />
+
+        <RadioButton
+            android:id="@+id/radio_theme_light"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_theme_selection_mode_light"
+            android:textSize="20sp"
+            android:padding="12dp"
+            android:focusable="true"
+            android:clickable="true" />
+
+        <RadioButton
+            android:id="@+id/radio_theme_dark"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_theme_selection_mode_dark"
+            android:textSize="20sp"
+            android:padding="12dp"
+            android:focusable="true"
+            android:clickable="true" />
+
+    </RadioGroup>
+
+</LinearLayout>

app/src/main/res/layout-television/element_search_result.xml

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginBottom="8dp"
+    android:focusable="true"
+    android:clickable="true"
+    android:nextFocusRight="@+id/dialog_negative_button"
+    android:background="@drawable/selector_search_result_item">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp">
+
+        <com.google.android.material.textview.MaterialTextView
+            android:id="@+id/station_name"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:ellipsize="marquee"
+            android:marqueeRepeatLimit="marquee_forever"
+            android:singleLine="true"
+            android:textAppearance="@style/TextAppearance.Material3.TitleLarge"
+            android:textColor="@color/text_default"
+            android:textStyle="bold"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="Station Name" />
+
+        <com.google.android.material.textview.MaterialTextView
+            android:id="@+id/station_url"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="4dp"
+            android:ellipsize="marquee"
+            android:marqueeRepeatLimit="marquee_forever"
+            android:singleLine="true"
+            android:textAppearance="@style/TextAppearance.Material3.BodyLarge"
+            android:textColor="@color/text_lightweight"
+            app:layout_constraintEnd_toEndOf="@+id/station_name"
+            app:layout_constraintStart_toStartOf="@+id/station_name"
+            app:layout_constraintTop_toBottomOf="@+id/station_name"
+            tools:text="http://stream.url" />
+
+        <com.google.android.material.textview.MaterialTextView
+            android:id="@+id/station_bitrate"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="2dp"
+            android:singleLine="true"
+            android:textAppearance="@style/TextAppearance.Material3.LabelLarge"
+            android:textColor="@color/text_lightweight"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="@+id/station_url"
+            app:layout_constraintStart_toStartOf="@+id/station_url"
+            app:layout_constraintTop_toBottomOf="@+id/station_url"
+            tools:text="128 kbps" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</LinearLayout>

app/src/main/res/layout-television/fragment_player.xml

@@ -0,0 +1,206 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="horizontal"
+    android:baselineAligned="false">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/station_list"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:clipToPadding="false"
+            android:padding="8dp"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <include
+            layout="@layout/element_onboarding"
+            android:visibility="gone" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+    <ScrollView
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1.2"
+        android:background="@color/player_sheet_background"
+        android:fillViewport="true">
+
+        <androidx.constraintlayout.widget.ConstraintLayout
+            android:id="@+id/player_ui"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:padding="24dp">
+
+            <com.google.android.material.imageview.ShapeableImageView
+                android:id="@+id/station_icon"
+                android:layout_width="160dp"
+                android:layout_height="160dp"
+                android:layout_marginTop="16dp"
+                android:background="@drawable/shape_cover_small"
+                android:contentDescription="@string/descr_player_station_image"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toTopOf="parent"
+                app:shapeAppearanceOverlay="@style/RoundedCorners"
+                app:srcCompat="@drawable/ic_default_station_image_72dp" />
+
+            <com.google.android.material.textview.MaterialTextView
+                android:id="@+id/player_station_name"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="16dp"
+                android:ellipsize="marquee"
+                android:marqueeRepeatLimit="marquee_forever"
+                android:singleLine="true"
+                android:textAlignment="center"
+                android:textAppearance="@style/TextAppearance.Material3.HeadlineMedium"
+                android:textColor="@color/player_sheet_text_main"
+                android:textStyle="bold"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/station_icon"
+                tools:text="Station Name" />
+
+            <com.google.android.material.textview.MaterialTextView
+                android:id="@+id/player_station_metadata"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:ellipsize="end"
+                android:singleLine="true"
+                android:textAlignment="center"
+                android:textAppearance="@style/TextAppearance.Material3.BodyLarge"
+                android:textColor="@color/player_sheet_text_main"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/player_station_name"
+                tools:text="Artist - Title" />
+
+            <LinearLayout
+                android:id="@+id/controls_row"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="24dp"
+                android:gravity="center"
+                android:orientation="horizontal"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/player_station_metadata">
+
+                <ImageButton
+                    android:id="@+id/player_prev_button"
+                    android:layout_width="60dp"
+                    android:layout_height="60dp"
+                    android:layout_marginEnd="16dp"
+                    android:background="@drawable/selector_generic_button_focus"
+                    android:contentDescription="@string/descr_expanded_player_metadata_previous_button"
+                    android:focusable="true"
+                    android:padding="12dp"
+                    app:srcCompat="@drawable/ic_chevron_left_24dp" />
+
+                <ImageButton
+                    android:id="@+id/player_play_button"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:background="@drawable/selector_play_button"
+                    android:contentDescription="@string/descr_player_playback_button"
+                    android:focusable="true"
+                    android:scaleType="center"
+                    app:srcCompat="@drawable/ic_player_play_symbol_42dp" />
+
+                <ImageButton
+                    android:id="@+id/player_next_button"
+                    android:layout_width="60dp"
+                    android:layout_height="60dp"
+                    android:layout_marginStart="16dp"
+                    android:background="@drawable/selector_generic_button_focus"
+                    android:contentDescription="@string/descr_expanded_player_metadata_next_button"
+                    android:focusable="true"
+                    android:padding="12dp"
+                    app:srcCompat="@drawable/ic_chevron_right_24dp" />
+
+            </LinearLayout>
+
+            <LinearLayout
+                android:id="@+id/secondary_controls_row"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:gravity="center"
+                android:orientation="horizontal"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/controls_row">
+
+                <ImageButton
+                    android:id="@+id/copy_station_metadata_button"
+                    android:layout_width="48dp"
+                    android:layout_height="48dp"
+                    android:layout_marginEnd="12dp"
+                    android:background="@drawable/selector_generic_button_focus"
+                    android:focusable="true"
+                    android:padding="8dp"
+                    app:srcCompat="@drawable/ic_copy_content_24dp"
+                    tools:ignore="ContentDescription" />
+
+                <ImageButton
+                    android:id="@+id/sleep_timer_start_button"
+                    android:layout_width="48dp"
+                    android:layout_height="48dp"
+                    android:layout_marginEnd="12dp"
+                    android:background="@drawable/selector_generic_button_focus"
+                    android:focusable="true"
+                    android:padding="8dp"
+                    app:srcCompat="@drawable/ic_sleep_timer_24dp"
+                    tools:ignore="ContentDescription" />
+
+                <ImageButton
+                    android:id="@+id/sleep_timer_cancel_button"
+                    android:layout_width="48dp"
+                    android:layout_height="48dp"
+                    android:background="@drawable/selector_generic_button_focus"
+                    android:focusable="true"
+                    android:padding="8dp"
+                    android:visibility="gone"
+                    app:srcCompat="@drawable/ic_clear_24dp"
+                    tools:ignore="ContentDescription" />
+
+            </LinearLayout>
+
+            <ProgressBar
+                android:id="@+id/player_buffering_indicator"
+                style="?android:attr/progressBarStyleLarge"
+                android:layout_width="96dp"
+                android:layout_height="96dp"
+                android:indeterminateTint="@color/player_button_buffering"
+                android:visibility="invisible"
+                app:layout_constraintBottom_toBottomOf="@+id/controls_row"
+                app:layout_constraintEnd_toEndOf="@+id/controls_row"
+                app:layout_constraintStart_toStartOf="@+id/controls_row"
+                app:layout_constraintTop_toTopOf="@+id/controls_row" />
+
+            <com.google.android.material.textview.MaterialTextView
+                android:id="@+id/sleep_timer_remaining_time"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:textAppearance="@style/TextAppearance.Material3.BodyMedium"
+                android:textColor="@color/player_sheet_text_main"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/secondary_controls_row"
+                tools:text="15:00" />
+
+        </androidx.constraintlayout.widget.ConstraintLayout>
+    </ScrollView>
+
+</LinearLayout>

app/src/main/res/layout-television/preference_visualizer.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <FrameLayout
+        android:id="@+id/visualizer_container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="#FF000000"
+        android:focusable="true" />
+
+</LinearLayout>

app/src/main/res/layout/activity_main.xml

@@ -4,6 +4,8 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:background="?android:attr/colorBackground"
+    android:fitsSystemWindows="true"
     tools:context=".MainActivity">
 
     <com.google.android.material.appbar.MaterialToolbar
@@ -28,4 +30,49 @@
         app:layout_constraintTop_toBottomOf="@+id/main_toolbar"
         app:navGraph="@navigation/nav_graph_main" />
 
+    <!-- SPLASH / LOADING SCREEN -->
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/loading_layout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@color/splashBackgroundColor"
+        android:elevation="10dp"
+        android:visibility="visible">
+
+        <ImageView
+            android:id="@+id/loading_logo"
+            android:layout_width="160dp"
+            android:layout_height="160dp"
+            android:contentDescription="@string/icon_launcher"
+            android:src="@mipmap/ic_launcher"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintVertical_bias="0.4" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="24dp"
+            android:text="@string/loading"
+            android:textAppearance="@style/TextAppearance.Material3.HeadlineSmall"
+            android:textColor="@color/default_neutral_white"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/loading_logo" />
+
+        <ProgressBar
+            style="?android:attr/progressBarStyleHorizontal"
+            android:layout_width="200dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:indeterminate="true"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/loading_logo"
+            android:visibility="invisible" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/bottom_sheet_playback_controls.xml

@@ -211,6 +211,18 @@
         app:layout_constraintTop_toBottomOf="@+id/sheet_previous_metadata_button"
         app:srcCompat="@drawable/ic_copy_content_24dp" />
 
+    <androidx.mediarouter.app.MediaRouteButton
+        android:id="@+id/media_route_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="8dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:padding="8dp"
+        app:layout_constraintBottom_toBottomOf="@+id/copy_station_metadata_button"
+        app:layout_constraintStart_toEndOf="@+id/copy_station_metadata_button"
+        app:layout_constraintTop_toTopOf="@+id/copy_station_metadata_button"
+        app:mediaRouteButtonTint="@color/player_sheet_text_main" />
+
     <com.google.android.material.textview.MaterialTextView
         android:id="@+id/sheet_bitrate_view"
         android:layout_width="wrap_content"

app/src/main/res/layout/card_add_new_station.xml

@@ -12,6 +12,8 @@
         android:layout_marginStart="8dp"
         android:layout_marginTop="10dp"
         android:layout_marginBottom="24dp"
+        android:focusable="true"
+        android:clickable="true"
         android:stateListAnimator="@null"
         app:backgroundTint="@color/list_card_background"
         app:icon="@drawable/ic_add_24dp"
@@ -20,6 +22,24 @@
         app:strokeColor="@color/list_card_stroke_background"
         app:strokeWidth="3dp" />
 
+    <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
+        android:id="@+id/card_visualizer"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="end"
+        android:layout_marginTop="10dp"
+        android:layout_marginEnd="70dp"
+        android:layout_marginBottom="24dp"
+        android:focusable="true"
+        android:clickable="true"
+        android:stateListAnimator="@null"
+        app:backgroundTint="@color/list_card_background"
+        app:icon="@drawable/ic_music_note_24dp"
+        app:iconTint="@color/icon_default"
+        app:rippleColor="@color/list_card_stroke_background"
+        app:strokeColor="@color/list_card_stroke_background"
+        app:strokeWidth="3dp" />
+
     <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
         android:id="@+id/card_settings"
         android:layout_width="wrap_content"
@@ -28,6 +48,8 @@
         android:layout_marginTop="10dp"
         android:layout_marginEnd="8dp"
         android:layout_marginBottom="24dp"
+        android:focusable="true"
+        android:clickable="true"
         android:stateListAnimator="@null"
         app:backgroundTint="@color/list_card_background"
         app:icon="@drawable/ic_settings_24dp"

app/src/main/res/layout/card_station.xml

@@ -31,6 +31,21 @@
             app:shapeAppearanceOverlay="@style/RoundedCorners"
             app:srcCompat="@drawable/ic_default_station_image_72dp" />
 
+        <ProgressBar
+            android:id="@+id/download_progress"
+            style="@style/Widget.AppCompat.ProgressBar.Horizontal"
+            android:layout_width="0dp"
+            android:layout_height="4dp"
+            android:layout_marginStart="8dp"
+            android:layout_marginEnd="8dp"
+            android:layout_marginTop="8dp"
+            android:progressTint="@color/player_button_background"
+            android:visibility="gone"
+            app:layout_constraintEnd_toEndOf="@+id/station_icon"
+            app:layout_constraintStart_toStartOf="@+id/station_icon"
+            app:layout_constraintTop_toTopOf="@+id/station_icon"
+            tools:visibility="visible" />
+
         <com.google.android.material.imageview.ShapeableImageView
             android:id="@+id/change_image_view"
             android:layout_width="0dp"
@@ -155,6 +170,21 @@
             app:layout_constraintEnd_toStartOf="@+id/save_button"
             app:layout_constraintTop_toTopOf="@+id/save_button" />
 
+        <ProgressBar
+            android:id="@+id/buffering_progress"
+            style="@style/Widget.AppCompat.ProgressBar.Horizontal"
+            android:layout_width="0dp"
+            android:layout_height="4dp"
+            android:layout_marginStart="8dp"
+            android:layout_marginEnd="8dp"
+            android:layout_marginBottom="4dp"
+            android:progressTint="@color/player_button_background"
+            android:visibility="gone"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            tools:visibility="visible" />
+
         <androidx.constraintlayout.widget.Group
             android:id="@+id/default_edit_views"
             android:layout_width="0dp"

app/src/main/res/layout/dialog_preset_selection.xml

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="16dp">
+
+    <TextView
+        android:id="@+id/dialog_title"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/pref_preset_selection_title"
+        android:textSize="18sp"
+        android:textStyle="bold"
+        android:paddingBottom="12dp" />
+
+    <RadioGroup
+        android:id="@+id/preset_radio_group"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <RadioButton
+            android:id="@+id/radio_preset_none"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_none"
+            android:textSize="16sp"
+            android:padding="8dp"/>
+
+        <RadioButton
+            android:id="@+id/radio_preset_rock"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_rock"
+            android:textSize="16sp"
+            android:padding="8dp"/>
+
+        <RadioButton
+            android:id="@+id/radio_preset_pop"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_pop"
+            android:textSize="16sp"
+            android:padding="8dp"/>
+
+        <RadioButton
+            android:id="@+id/radio_preset_jazz"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_jazz"
+            android:textSize="16sp"
+            android:padding="8dp"/>
+
+        <RadioButton
+            android:id="@+id/radio_preset_flat"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_preset_flat"
+            android:textSize="16sp"
+            android:padding="8dp"/>
+
+    </RadioGroup>
+
+</LinearLayout>

app/src/main/res/layout/dialog_theme_selection.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="16dp">
+
+    <TextView
+        android:id="@+id/dialog_title"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/pref_theme_selection_title"
+        android:textSize="18sp"
+        android:textStyle="bold"
+        android:paddingBottom="12dp" />
+
+    <RadioGroup
+        android:id="@+id/theme_radio_group"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <RadioButton
+            android:id="@+id/radio_theme_follow_system"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_theme_selection_mode_device_default"
+            android:textSize="16sp"
+            android:padding="8dp"/>
+
+        <RadioButton
+            android:id="@+id/radio_theme_light"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_theme_selection_mode_light"
+            android:textSize="16sp"
+            android:padding="8dp"/>
+
+        <RadioButton
+            android:id="@+id/radio_theme_dark"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/pref_theme_selection_mode_dark"
+            android:textSize="16sp"
+            android:padding="8dp"/>
+
+    </RadioGroup>
+
+</LinearLayout>

app/src/main/res/layout/preference_visualizer.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <FrameLayout
+        android:id="@+id/visualizer_container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="#FF000000" />
+
+</LinearLayout>

app/src/main/res/menu/expanded_controller.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/media_route_menu_item"
+        android:title="@string/media_route_menu_title"
+        app:actionProviderClass="androidx.mediarouter.app.MediaRouteActionProvider"
+        app:showAsAction="always" />
+
+</menu>

app/src/main/res/navigation/nav_graph_main.xml

@@ -13,12 +13,43 @@
         <action
             android:id="@+id/action_map_fragment_to_settings_fragment"
             app:destination="@id/settings_destination" />
+        <action
+            android:id="@+id/action_map_fragment_to_visualizer_fragment"
+            app:destination="@id/visualizer_destination" />
+        <action
+            android:id="@+id/action_map_fragment_to_player_to_add_station"
+            app:destination="@id/add_station_destination" />
     </fragment>
 
     <!-- SETTINGS -->
     <fragment
         android:id="@+id/settings_destination"
         android:name="com.michatec.radio.SettingsFragment"
-        android:label="Settings" />
+        android:label="Settings">
+        <action
+            android:id="@+id/action_settings_to_equalizer"
+            app:destination="@id/equalizer_destination" />
+        <action
+            android:id="@+id/action_settings_to_visualizer"
+            app:destination="@id/visualizer_destination" />
+    </fragment>
 
+    <!-- EQUALIZER -->
+    <fragment
+        android:id="@+id/equalizer_destination"
+        android:name="com.michatec.radio.EqualizerFragment"
+        android:label="Equalizer" />
+
+    <!-- VISUALIZER -->
+    <fragment
+        android:id="@+id/visualizer_destination"
+        android:name="com.michatec.radio.VisualizerFragment"
+        android:label="Visualizer" />
+
+    <!-- ADD STATION (TV) -->
+    <fragment
+        android:id="@+id/add_station_destination"
+        android:name="com.michatec.radio.AddStationFragment"
+        android:label="Add Station"
+        tools:layout="@layout/dialog_find_station" />
 </navigation>

app/src/main/res/values-da/strings.xml

@@ -65,7 +65,7 @@
     <string name="pref_edit_station_title">Rediger station</string>
     <string name="pref_general_title">Generelt</string>
     <string name="pref_license_title">Denne app er open source</string>
-    <string name="pref_license_summary">Licenseret under MIT-licensen</string>
+    <string name="pref_license_summary">Licenseret under GPLv3-licensen</string>
     <string name="pref_links_title">Links</string>
     <string name="pref_m3u_export_summary">Gem stationer som M3U-playlister til brug i andre afspillere.</string>
     <string name="pref_m3u_export_title">Eksportér M3U-playliste</string>

app/src/main/res/values-de/strings.xml

@@ -51,6 +51,10 @@
     <string name="player_sheet_h2_station_metadata">Momentan läuft</string>
     <string name="player_sheet_h2_stream_url">Streaming-Adresse</string>
     <!-- Settings -->
+    <string name="pref_update_collection_title">Senderinformationnen aktualisieren</string>
+    <string name="pref_update_collection_summary">Die neueste Version aller Senderinformationen herunterladen.</string>
+    <string name="dialog_yes_no_message_update_collection">Die neueste Version aller Senderinformationen herunterladen?</string>
+    <string name="dialog_yes_no_positive_button_update_collection">Aktualisieren</string>
     <string name="pref_advanced_title">Erweitert</string>
     <string name="pref_app_version_summary">Version</string>
     <string name="pref_app_version_title">App-Version</string>
@@ -66,7 +70,7 @@
     <string name="pref_edit_station_title">Sender bearbeiten</string>
     <string name="pref_general_title">Allgemein</string>
     <string name="pref_license_title">Diese Anwendung ist Open Source</string>
-    <string name="pref_license_summary">Lizenziert unter der MIT License</string>
+    <string name="pref_license_summary">Lizenziert unter der GPLv3 License</string>
     <string name="pref_links_title">Links</string>
     <string name="pref_m3u_export_summary">Radiosender in einer M3U-Playlistdatei sichern, die in andere Player importiert werden können.</string>
     <string name="pref_m3u_export_title">M3U-Playlist exportieren</string>
@@ -113,4 +117,34 @@
     <!-- Snackbars -->
     <string name="snackbar_show">Zeigen</string>
     <string name="snackbar_update_available">ist verfügbar!</string>
+    <string name="pref_audio_effects_title">Audio-Effekte</string>
+    <string name="pref_bass_boost_title">Bass-Boost</string>
+    <string name="pref_bass_boost_summary">Erhöhen Sie die Bassverstärkung.</string>
+    <string name="pref_reverb_title">Hall</string>
+    <string name="pref_reverb_summary">Reverb-Mix anpassen.</string>
+    <string name="pref_drc_title">Dynamikkompression</string>
+    <string name="pref_drc_summary">Den Dynamikbereich für eine gleichbleibende Lautstärke komprimieren.</string>
+    <string name="pref_eq_low_title">Equalizer: 31 Hz</string>
+    <string name="pref_eq_mid_title">Equalizer: 2 kHz</string>
+    <string name="pref_eq_high_title">Equalizer: 16 kHz</string>
+    <string name="pref_eq_band_1_title">Equalizer: 62 Hz</string>
+    <string name="pref_eq_band_2_title">Equalizer: 125 Hz</string>
+    <string name="pref_eq_band_3_title">Equalizer: 250 Hz</string>
+    <string name="pref_eq_band_4_title">Equalizer: 500 Hz</string>
+    <string name="pref_eq_band_5_title">Equalizer: 1 kHz</string>
+    <string name="pref_eq_band_6_title">Equalizer: 4 kHz</string>
+    <string name="pref_eq_band_7_title">Equalizer: 8 kHz</string>
+    <string name="pref_equalizer_title">Equalizer</string>
+    <string name="pref_equalizer_summary">Passen Sie die Audio-Frequenzen an.</string>
+    <string name="pref_equalizer_summary_off">Das Anpassen von den Audio-Frequenzen ist deaktiviert.</string>
+    <string name="pref_equalizer_reset_title">Equalizer zurücksetzen</string>
+    <string name="pref_preset_selection_title">Preset auswählen</string>
+    <string name="pref_preset_selection_summary">Wählen Sie ein Klangprofil</string>
+    <string name="pref_preset_none">Keines (Manuell)</string>
+    <string name="pref_preset_rock">Rock</string>
+    <string name="pref_preset_pop">Pop</string>
+    <string name="pref_preset_jazz">Jazz</string>
+    <string name="pref_preset_flat">Flach</string>
+    <string name="pref_visualizer_title">Spektrumanzeige</string>
+    <string name="pref_visualizer_summary">Sehe die Spektrumanzeige.</string>
 </resources>

app/src/main/res/values-el/strings.xml

@@ -63,7 +63,7 @@
     <string name="pref_edit_station_title">Επεξεργασία Σταθμών</string>
     <string name="pref_general_title">Γενικές ρυθμίσεις</string>
     <string name="pref_license_title">Αυτή η εφαρμογή είναι ανοικτού κώδικα</string>
-    <string name="pref_license_summary">Αδειοδότηση με άδεια MIT</string>
+    <string name="pref_license_summary">Αδειοδότηση με άδεια GPLv3</string>
     <string name="pref_links_title">Σύνδεσμοι</string>
     <string name="pref_m3u_export_summary">Αποθηκεύστε τους ραδιοφωνικούς σας σταθμούς σε ένα αρχείο λίστας αναπαραγωγής M3U που μπορεί να εισαχθεί σε άλλους αναπαραγωγούς.</string>
     <string name="pref_m3u_export_title">Εξαγωγή M3U</string>

app/src/main/res/values-fr/strings.xml

@@ -65,7 +65,7 @@
     <string name="pref_edit_station_title">Modifier la station</string>
     <string name="pref_general_title">Général</string>
     <string name="pref_license_title">Cette application est Open Source</string>
-    <string name="pref_license_summary">Sous licence MIT</string>
+    <string name="pref_license_summary">Sous licence GPLv3</string>
     <string name="pref_links_title">Liens</string>
     <string name="pref_m3u_export_summary">Enregistrez les stations dans un fichier de playlist M3U pouvant être importé dans dautres lecteurs.</string>
     <string name="pref_m3u_export_title">Exporter la playlist M3U</string>

app/src/main/res/values-ja/strings.xml

@@ -65,7 +65,7 @@
     <string name="pref_edit_station_title">局を編集</string>
     <string name="pref_general_title">一般</string>
     <string name="pref_license_title">このアプリはオープンソースです</string>
-    <string name="pref_license_summary">MITライセンスで提供されています</string>
+    <string name="pref_license_summary">GPLv3ライセンスで提供されています</string>
     <string name="pref_links_title">リンク</string>
     <string name="pref_m3u_export_summary">ラジオ局をM3Uプレイリストとして保存し、他のプレイヤーにインポートできます。</string>
     <string name="pref_m3u_export_title">M3Uプレイリストをエクスポート</string>

app/src/main/res/values-night-v31/colors.xml

@@ -32,4 +32,5 @@
     <color name="player_sheet_text_main">@android:color/system_neutral1_50</color>
     <color name="player_sheet_icon">@android:color/system_neutral1_50</color>
 
+    <color name="cardview_reordering">@android:color/system_accent1_100</color>
 </resources>

app/src/main/res/values-night-v31/styles.xml

@@ -11,6 +11,9 @@
         <item name="colorOnSurfaceVariant">@android:color/system_accent1_100</item>
         <item name="android:colorBackground">@android:color/system_neutral1_900</item>
         <item name="android:textColorHighlight">@android:color/system_accent1_500</item>
+        <item name="colorControlHighlight">#33FFFFFF</item>
+        <item name="android:colorControlHighlight">#33FFFFFF</item>
+        <item name="android:colorFocusedHighlight">#80FFFFFF</item>
 
         <!-- Do not use primary colored elevation overlays to present a visual hierarchy - TOO COLORFUL  -->
         <item name="elevationOverlayEnabled">false</item>
@@ -28,9 +31,6 @@
         <!-- Don't show light status bar -->
         <item name="android:statusBarColor">@android:color/transparent</item>
 
-        <!-- Set Navigation Bar color -->
-        <item name="android:navigationBarColor">@color/player_sheet_background</item>
-
         <!-- Set splash screen icon background color -->
         <item name="android:windowSplashScreenIconBackgroundColor">@color/splashBackgroundColor</item>
     </style>
@@ -39,6 +39,7 @@
         <item name="colorSurface">@color/player_sheet_background</item>
         <item name="materialAlertDialogBodyTextStyle">@style/TextAppearance.MaterialComponents.Body1</item>
         <item name="android:backgroundDimAmount">0.64</item>
+        <item name="colorControlActivated">#FFDAE2FF</item>
     </style>
 
     <style name="ThemeOverlay.App.TimePicker" parent="ThemeOverlay.MaterialComponents.TimePicker">
@@ -49,5 +50,12 @@
         <item name="android:background">@color/player_sheet_background</item>
         <item name="dialogCornerRadius">28dp</item>
         <item name="checkedTextViewStyle">@style/AlertDialog.TextColor</item>
+        <item name="colorControlActivated">#FFDAE2FF</item>
+        <item name="colorControlHighlight">#33FFFFFF</item>
+        <item name="android:colorFocusedHighlight">#80FFFFFF</item>
+    </style>
+
+    <style name="AlertDialog.TextColor" parent="@style/TextAppearance.MaterialComponents.Body1">
+        <item name="android:textColor">?attr/colorControlNormal</item>
     </style>
 </resources>

app/src/main/res/values-night/colors.xml

@@ -1,5 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
-
 <resources>
     <!-- NIGHT THEME COLORS -->
 
@@ -32,4 +31,5 @@
     <color name="player_sheet_text_main">#FFFFFFFF</color>
     <color name="player_sheet_icon">#FFFFFFFF</color>
 
+    <color name="cardview_reordering">#FFDAE2FF</color>
 </resources>

app/src/main/res/values-night/styles.xml

@@ -7,6 +7,9 @@
         <item name="colorAccent">#FFDAE2FF</item>
         <item name="colorOnPrimary">#FF182E60</item>
         <item name="android:textColorHighlight">#FF495D92</item>
+        <item name="colorControlHighlight">#33FFFFFF</item>
+        <item name="android:colorControlHighlight">#33FFFFFF</item>
+        <item name="android:colorFocusedHighlight">#80FFFFFF</item>
 
         <!-- Do not use primary colored elevation overlays to present a visual hierarchy - TOO COLORFUL  -->
         <item name="elevationOverlayEnabled">false</item>
@@ -24,4 +27,10 @@
         <!-- Don't show light status bar -->
         <item name="android:statusBarColor">@android:color/transparent</item>
     </style>
+
+    <style name="CustomCastExpandedControllerStyle" parent="CastExpandedController">
+        <item name="android:windowBackground">#FFFFFF</item>
+        <item name="castBackground">#FFFFFF</item>
+        <item name="castButtonColor">#FF495D92</item>
+    </style>
 </resources>

app/src/main/res/values-ru/strings.xml

@@ -63,7 +63,7 @@
     <string name="pref_edit_station_title">Редактировать станции</string>
     <string name="pref_general_title">Общие</string>
     <string name="pref_license_title">Это приложение с открытым исходным кодом</string>
-    <string name="pref_license_summary">Лицензировано под лицензией MIT</string>
+    <string name="pref_license_summary">Лицензировано под лицензией GPLv3</string>
     <string name="pref_links_title">Ссылки</string>
     <string name="pref_m3u_export_summary">Сохраните ваши радиостанции в файл плейлиста M3U, который можно импортировать в другие проигрыватели.</string>
     <string name="pref_m3u_export_title">Экспорт M3U</string>
@@ -98,7 +98,7 @@
     <string name="toastmessage_preview_playback_started">Было запущено воспроизведение предварительного просмотра.</string>
     <string name="toastmessage_restored">Станции были успешно восстановлены.</string>
     <string name="toastmessage_save_m3u">Сохранение радиостанций как M3U…</string>
-    <string name="toastmessage_save_pls">Сохранение радиостанций в формате PLS...</string>
+    <string name="toastmessage_save_pls">Сохранение радиостанций в формате PLS</string>
     <string name="toastmessage_shortcut_created">Ярлык создан.</string>
     <string name="toastmessage_shortcut_not_created">Ярлык не создан. Устройство не позволяет создавать ярлыки.</string>
     <string name="toastmessage_sleep_timer_unable_to_start">Пожалуйста, запустите сперва воспроизведение.</string>

app/src/main/res/values-television/styles.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="SplashTheme" parent="Theme.Material3.DayNight.NoActionBar">
+        <item name="android:windowBackground">@drawable/splash_screen</item>
+        <item name="android:statusBarColor">@color/splashBackgroundColor</item>
+    </style>
+</resources>

app/src/main/res/values-uk/strings.xml

@@ -63,7 +63,7 @@
     <string name="pref_edit_station_title">Редагувати станції</string>
     <string name="pref_general_title">Загальні</string>
     <string name="pref_license_title">Цей застосунок має відкритий початковий код</string>
-    <string name="pref_license_summary">На умовах ліцензії MIT</string>
+    <string name="pref_license_summary">На умовах ліцензії GPLv3</string>
     <string name="pref_links_title">Посилання</string>
     <string name="pref_m3u_export_summary">Збережіть свої радіостанції у файлі списку відтворення M3U, який можна імпортувати в інші програвачі.</string>
     <string name="pref_m3u_export_title">Експорт M3U</string>

app/src/main/res/values-v27/styles.xml

@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-
-    <style name="AppTheme" parent="Theme.Material3.DayNight.NoActionBar">
-        <!-- Set AppCompat’s colors -->
-        <item name="colorPrimary">#FF495D92</item>
-        <item name="colorAccent">#FF495D92</item>
-        <item name="android:textColorHighlight">#FF495D92</item>
-
-        <!-- Do not use primary colored elevation overlays to present a visual hierarchy - TOO COLORFUL  -->
-        <item name="elevationOverlayEnabled">false</item>
-
-        <!-- Switch Theming  -->
-        <item name="switchPreferenceCompatStyle">@style/Preference.SwitchPreferenceCompat.Material3</item>
-
-        <!-- Material Alert Dialog Theming -->
-        <item name="alertDialogTheme">@style/ThemeOverlay.App.AlertDialogTheme</item>
-
-        <!-- Use "light" Status Bar -->
-        <item name="android:windowLightStatusBar">true</item>
-        <item name="android:statusBarColor">@android:color/transparent</item>
-
-        <!-- Use "light" Navigation Bar -->
-        <item name="android:windowLightNavigationBar">true</item>
-    </style>
-</resources>