First basic implementation of cast functionality

app/build.gradle

@@ -54,6 +54,9 @@ dependencies {
     implementation "androidx.cardview:cardview:1.0.0"
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
 
+    // Google GMS
+    implementation 'com.google.android.gms:play-services-cast-framework:21.0.0'
+
     // Android Material
     implementation 'com.google.android.material:material:1.4.0'
 
@@ -70,6 +73,7 @@ dependencies {
     implementation "androidx.media3:media3-common:1.0.0-alpha01"
     implementation "androidx.media3:media3-exoplayer:1.0.0-alpha01"
     implementation "androidx.media3:media3-ui:1.0.0-alpha01"
+    implementation "androidx.media3:media3-cast:1.0.0-alpha01"
 
     annotationProcessor 'com.github.bumptech.glide:compiler:4.12.0'
     annotationProcessor 'androidx.room:room-compiler:2.4.0'

app/src/main/AndroidManifest.xml

@@ -16,6 +16,11 @@
         android:theme="@style/AppTheme"
         android:usesCleartextTraffic="true"
         android:allowBackup="false">
+
+        <meta-data
+            android:name="com.google.android.gms.cast.framework.OPTIONS_PROVIDER_CLASS_NAME"
+            android:value="androidx.media3.cast.DefaultCastOptionsProvider"/>
+
         <activity
             android:name=".ui.activity.MainActivity"
             android:windowSoftInputMode="adjustPan|adjustResize"

app/src/main/java/com/cappielloantonio/play/service/MediaService.java

@@ -5,14 +5,15 @@ import android.app.PendingIntent;
 import android.content.Intent;
 
 import androidx.annotation.Nullable;
+import androidx.media3.cast.CastPlayer;
+import androidx.media3.cast.SessionAvailabilityListener;
 import androidx.media3.common.AudioAttributes;
 import androidx.media3.common.C;
 import androidx.media3.common.MediaItem;
+import androidx.media3.common.MimeTypes;
 import androidx.media3.common.Player;
 import androidx.media3.datasource.DataSource;
 import androidx.media3.exoplayer.ExoPlayer;
-import androidx.media3.exoplayer.analytics.AnalyticsListener;
-import androidx.media3.exoplayer.analytics.PlaybackStatsListener;
 import androidx.media3.exoplayer.source.DefaultMediaSourceFactory;
 import androidx.media3.exoplayer.source.MediaSourceFactory;
 import androidx.media3.session.MediaLibraryService;
@@ -20,14 +21,16 @@ import androidx.media3.session.MediaSession;
 
 import com.cappielloantonio.play.ui.activity.MainActivity;
 import com.cappielloantonio.play.util.DownloadUtil;
+import com.google.android.gms.cast.framework.CastContext;
 
-public class MediaService extends MediaLibraryService {
+@SuppressLint("UnsafeOptInUsageError")
+public class MediaService extends MediaLibraryService implements SessionAvailabilityListener {
     private static final String TAG = "MediaService";
 
     public static final int REQUEST_CODE = 432;
 
     private ExoPlayer player;
-    private DataSource.Factory dataSourceFactory;
+    private CastPlayer castPlayer;
     private MediaSourceFactory mediaSourceFactory;
     private MediaLibrarySession mediaLibrarySession;
 
@@ -36,7 +39,11 @@ public class MediaService extends MediaLibraryService {
         super.onCreate();
         initializeMediaSource();
         initializePlayer();
+        initializeCastPlayer();
+        initializeMediaLibrarySession();
         initializePlayerListener();
+
+        setPlayer(null, castPlayer.isCastSessionAvailable() ? castPlayer : player);
     }
 
     @Override
@@ -51,13 +58,11 @@ public class MediaService extends MediaLibraryService {
         return mediaLibrarySession;
     }
 
-    @SuppressLint("UnsafeOptInUsageError")
     private void initializeMediaSource() {
-        dataSourceFactory = DownloadUtil.getDataSourceFactory(this);
+        DataSource.Factory dataSourceFactory = DownloadUtil.getDataSourceFactory(this);
         mediaSourceFactory = new DefaultMediaSourceFactory(dataSourceFactory);
     }
 
-    @SuppressLint("UnsafeOptInUsageError")
     private void initializePlayer() {
         player = new ExoPlayer.Builder(this)
                 .setMediaSourceFactory(mediaSourceFactory)
@@ -65,15 +70,40 @@ public class MediaService extends MediaLibraryService {
                 .setHandleAudioBecomingNoisy(true)
                 .setWakeMode(C.WAKE_MODE_NETWORK)
                 .build();
+    }
 
+    private void initializeCastPlayer() {
+        castPlayer = new CastPlayer(CastContext.getSharedInstance(this));
+        castPlayer.setSessionAvailabilityListener(this);
+    }
+
+    private void initializeMediaLibrarySession() {
         mediaLibrarySession = new MediaLibrarySession.Builder(this, player, new LibrarySessionCallback())
                 .setMediaItemFiller(new CustomMediaItemFiller())
                 .setSessionActivity(PendingIntent.getActivity(getApplicationContext(), REQUEST_CODE, new Intent(getApplicationContext(), MainActivity.class), PendingIntent.FLAG_IMMUTABLE))
                 .build();
     }
 
-    @SuppressLint("UnsafeOptInUsageError")
+    private void setPlayer(Player oldPlayer, Player newPlayer) {
+        if (oldPlayer == newPlayer) return;
+        if (oldPlayer != null) oldPlayer.stop();
+
+        mediaLibrarySession.setPlayer(newPlayer);
+    }
+
+    @Override
+    public void onCastSessionAvailable() {
+        setPlayer(player, castPlayer);
+    }
+
+    @Override
+    public void onCastSessionUnavailable() {
+        setPlayer(castPlayer, player);
+    }
+
     private void releasePlayer() {
+        castPlayer.setSessionAvailabilityListener(null);
+        castPlayer.release();
         player.release();
         mediaLibrarySession.release();
     }
@@ -81,18 +111,17 @@ public class MediaService extends MediaLibraryService {
     private class LibrarySessionCallback implements MediaLibrarySession.MediaLibrarySessionCallback {
     }
 
-    @SuppressLint("UnsafeOptInUsageError")
     private class CustomMediaItemFiller implements MediaSession.MediaItemFiller {
         @Override
         public MediaItem fillInLocalConfiguration(MediaSession session, MediaSession.ControllerInfo controller, MediaItem mediaItem) {
             return mediaItem.buildUpon()
                     .setUri(mediaItem.mediaMetadata.mediaUri)
                     .setMediaMetadata(mediaItem.mediaMetadata)
+                    .setMimeType(MimeTypes.BASE_TYPE_AUDIO)
                     .build();
         }
     }
 
-    @SuppressLint("UnsafeOptInUsageError")
     private void initializePlayerListener() {
         player.addListener(new Player.Listener() {
             @Override
@@ -103,7 +132,7 @@ public class MediaService extends MediaLibraryService {
 
             @Override
             public void onIsPlayingChanged(boolean isPlaying) {
-                if(isPlaying) {
+                if (isPlaying) {
                     MediaManager.setPlayingPausedTimestamp(player.getCurrentMediaItem(), player.getCurrentPosition());
                 }
             }

app/src/main/java/com/cappielloantonio/play/ui/fragment/HomeFragment.java

@@ -46,6 +46,7 @@ import com.cappielloantonio.play.ui.activity.MainActivity;
 import com.cappielloantonio.play.util.MusicUtil;
 import com.cappielloantonio.play.util.UIUtil;
 import com.cappielloantonio.play.viewmodel.HomeViewModel;
+import com.google.android.gms.cast.framework.CastButtonFactory;
 import com.google.common.util.concurrent.ListenableFuture;
 
 import java.util.Objects;
@@ -79,6 +80,7 @@ public class HomeFragment extends Fragment {
     public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
         super.onCreateOptionsMenu(menu, inflater);
         inflater.inflate(R.menu.main_page_menu, menu);
+        CastButtonFactory.setUpMediaRouteButton(requireContext(), menu, R.id.media_route_menu_item);
     }
 
     @Nullable

app/src/main/java/com/cappielloantonio/play/util/MappingUtil.java

@@ -1,10 +1,12 @@
 package com.cappielloantonio.play.util;
 
+import android.annotation.SuppressLint;
 import android.content.Context;
 import android.os.Bundle;
 
 import androidx.media3.common.MediaItem;
 import androidx.media3.common.MediaMetadata;
+import androidx.media3.common.MimeTypes;
 
 import com.cappielloantonio.play.model.Album;
 import com.cappielloantonio.play.model.Artist;
@@ -197,6 +199,7 @@ public class MappingUtil {
         return genres;
     }
 
+    @SuppressLint("UnsafeOptInUsageError")
     public static MediaItem mapMediaItem(Context context, Song song, boolean stream) {
         boolean isDownloaded = DownloadUtil.getDownloadTracker(context).isDownloaded(MusicUtil.getSongDownloadUri(song));
 
@@ -219,6 +222,7 @@ public class MappingUtil {
                                 .setExtras(bundle)
                                 .build()
                 )
+                .setMimeType(MimeTypes.BASE_TYPE_AUDIO)
                 .setUri(stream && !isDownloaded ? MusicUtil.getSongStreamUri(context, song) : MusicUtil.getSongDownloadUri(song))
                 .build();
     }

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

@@ -5,7 +5,13 @@
         android:id="@+id/action_search"
         android:icon="@drawable/ic_search"
         android:title="@string/menu_search_button"
-        app:showAsAction="ifRoom" />
+        app:showAsAction="always" />
+
+    <item
+        android:id="@+id/media_route_menu_item"
+        android:title="@string/media_route_menu_title"
+        app:actionProviderClass="androidx.mediarouter.app.MediaRouteActionProvider"
+        app:showAsAction="always" />
 
     <item
         android:id="@+id/action_settings"

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

@@ -212,4 +212,5 @@
     <string name="settings_summary_transcoding">Priority given to the transcoding mode. If set to \"Direct play\" the bitrate of the file will not be changed.</string>
     <string name="notification_channel_name">playNotificationChannelName</string>
     <string name="notification_channel_description">playNotificationChannelNameDescription</string>
+    <string name="media_route_menu_title">Cast</string>
 </resources>