Android MediaSession edit

Receiving and handling button events

This example creates a MediaSession object when a Service is started. The MediaSession object is released when the Service gets destroyed:

public final class MyService extends Service {
    private static MediaSession s_mediaSession;

    public void onCreate() {
        // Instantiate new MediaSession object.

    public void onDestroy() {
        if (s_mediaSession != null)

The following method instantiates and configures the MediaSession button callbacks:

private void configureMediaSession {
    s_mediaSession = new MediaSession(this, "MyMediaSession");

    // Overridden methods in the MediaSession.Callback class.
    s_mediaSession.setCallback(new MediaSession.Callback() {
        public boolean onMediaButtonEvent(Intent mediaButtonIntent) {
            Log.d(TAG, "onMediaButtonEvent called: " + mediaButtonIntent);
            KeyEvent ke = mediaButtonIntent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
            if (ke != null && ke.getAction() == KeyEvent.ACTION_DOWN) {
                int keyCode = ke.getKeyCode();
                Log.d(TAG, "onMediaButtonEvent Received command: " + ke);
            return super.onMediaButtonEvent(mediaButtonIntent);

        public void onSkipToNext() {
            Log.d(TAG, "onSkipToNext called (media button pressed)");
            Toast.makeText(getApplicationContext(), "onSkipToNext called", Toast.LENGTH_SHORT).show();
            skipToNextPlaylistItem(); // Handle this button press.

        public void onSkipToPrevious() {
            Log.d(TAG, "onSkipToPrevious called (media button pressed)");
            Toast.makeText(getApplicationContext(), "onSkipToPrevious called", Toast.LENGTH_SHORT).show();
            skipToPreviousPlaylistItem(); // Handle this button press.

        public void onPause() {
            Log.d(TAG, "onPause called (media button pressed)");
            Toast.makeText(getApplicationContext(), "onPause called", Toast.LENGTH_SHORT).show();
            mpPause(); // Pause the player.

        public void onPlay() {
            Log.d(TAG, "onPlay called (media button pressed)");
            mpStart(); // Start player/playback.

        public void onStop() {
            Log.d(TAG, "onStop called (media button pressed)");
            mpReset(); // Stop and/or reset the player.

    s_mediaSession.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS | MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS);

The following method sends meta data (stored in a HashMap) to the device using A2DP:

void sendMetaData(@NonNull final HashMap<String, String> hm) {
    // Return if Bluetooth A2DP is not in use.
    if (!((AudioManager) getSystemService(Context.AUDIO_SERVICE)).isBluetoothA2dpOn()) return;

    MediaMetadata metadata = new MediaMetadata.Builder()
            .putString(MediaMetadata.METADATA_KEY_TITLE, hm.get("Title"))
            .putString(MediaMetadata.METADATA_KEY_ALBUM, hm.get("Album"))
            .putString(MediaMetadata.METADATA_KEY_ARTIST, hm.get("Artist"))
            .putString(MediaMetadata.METADATA_KEY_AUTHOR, hm.get("Author"))
            .putString(MediaMetadata.METADATA_KEY_COMPOSER, hm.get("Composer"))
            .putString(MediaMetadata.METADATA_KEY_WRITER, hm.get("Writer"))
            .putString(MediaMetadata.METADATA_KEY_DATE, hm.get("Date"))
            .putString(MediaMetadata.METADATA_KEY_GENRE, hm.get("Genre"))
            .putLong(MediaMetadata.METADATA_KEY_YEAR, tryParse(hm.get("Year")))
            .putLong(MediaMetadata.METADATA_KEY_DURATION, tryParse(hm.get("Raw Duration")))
            .putLong(MediaMetadata.METADATA_KEY_TRACK_NUMBER, tryParse(hm.get("Track Number")))


The following method sets the PlaybackState. It also sets which button actions the MediaSession will respond to:

private void setPlaybackState(@NonNull final int stateValue) {
    PlaybackState state = new PlaybackState.Builder()
            .setActions(PlaybackState.ACTION_PLAY | PlaybackState.ACTION_SKIP_TO_NEXT
                    | PlaybackState.ACTION_PAUSE | PlaybackState.ACTION_SKIP_TO_PREVIOUS
                    | PlaybackState.ACTION_STOP | PlaybackState.ACTION_PLAY_PAUSE)
            .setState(stateValue, PlaybackState.PLAYBACK_POSITION_UNKNOWN, 0)


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Receiving and handling button events

Table Of Contents
64 Menu
112 Loader
119 Xposed
132 Colors
135 Fresco
140 AdMob
147 Button
156 Vk SDK
166 MediaSession
170 XMPP
176 OpenCV
200 FileIO
203 Moshi
217 Paint
231 AIDL
241 JCodec
243 Okio
255 Looper
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