feat(ui): add dedicated station search fragment for television platforms

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/PlayerFragment.kt

@@ -34,6 +34,7 @@ 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
@@ -342,7 +343,14 @@ class PlayerFragment : Fragment(),
 
     /* Overrides onAddNewButtonTapped from CollectionAdapterListener */
     override fun onAddNewButtonTapped() {
-        FindStationDialog(activity as Activity, this as FindStationDialog.FindStationDialogListener).show()
+        // 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()
+        }
     }
 
 
@@ -625,6 +633,8 @@ class PlayerFragment : Fragment(),
                 }
                 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

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

@@ -8,15 +8,21 @@ 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
 
 
 /*
@@ -31,6 +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 {
@@ -138,6 +145,7 @@ class SearchResultAdapter(
     }
 
 
+    @OptIn(UnstableApi::class)
     private fun performPrePlayback(context: Context, streamUri: String) {
         if (streamUri.contains(".m3u8")) {
             // release previous player if it exists
@@ -151,8 +159,30 @@ class SearchResultAdapter(
             // release previous player if it exists
             stopPrePlayback()
 
-            // create a new instance of ExoPlayer
-            exoPlayer = ExoPlayer.Builder(context).build()
+            // set up audio attributes for the preview player
+            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)
@@ -199,7 +229,7 @@ class SearchResultAdapter(
             .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
             .build()
 
-        val focusRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT)
+        val focusRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN)
             .setAudioAttributes(audioAttributes)
             .build()
 

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

@@ -11,6 +11,7 @@
         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"
@@ -39,6 +40,7 @@
             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
@@ -47,6 +49,7 @@
             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>

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

@@ -9,6 +9,11 @@
         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"
@@ -44,6 +49,8 @@
         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"
@@ -73,6 +80,8 @@
             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
@@ -81,6 +90,7 @@
             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>

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

@@ -7,7 +7,7 @@
     android:layout_marginBottom="8dp"
     android:focusable="true"
     android:clickable="true"
-    android:nextFocusRight="@+id/dialog_positive_button"
+    android:nextFocusRight="@+id/dialog_negative_button"
     android:background="@drawable/selector_search_result_item">
 
     <androidx.constraintlayout.widget.ConstraintLayout
@@ -20,6 +20,7 @@
             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"
@@ -35,6 +36,7 @@
             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/src/main/res/navigation/nav_graph_main.xml

@@ -16,6 +16,9 @@
         <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 -->
@@ -42,4 +45,11 @@
         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>