我正在尝试使用 MediaSessionCompat 为我的应用添加锁屏播放器控件和元数据。我尝试的一切都不起作用。锁定屏幕在播放时不显示任何控件或元数据。请在下面查看我当前的代码，不胜感激。
流服务.java：
public class StreamService extends Service implements MediaPlayer.OnCuePointReceivedListener, MediaPlayer.OnStateChangedListener,
MediaPlayer.OnInfoListener, AudioManager.OnAudioFocusChangeListener {
private WifiManager.WifiLock wifiLock;
private static String LOG_TAG = "StreamService";
public static final String BROADCAST_PLAYER_STATE = "com.test.BROADCAST_PLAYER_STATE";
public static final String BROADCAST_PLAYER_META = "com.test.BROADCAST_PLAYER_META";
public static final String BROADCAST_PLAYER_ALBUM = "com.test.BROADCAST_PLAYER_ALBUM";
public static final int NOTIFICATION_ID = 999999;
private MediaSessionCompat mediaSession;
private boolean audioInterrupted = false;
public StreamService() {
}
@Override
public void onCreate(){
super.onCreate();
setupMediaPlayer();
setupMediaSession();
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public boolean onUnbind(Intent intent){
releasePlayer();
return false;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_NOT_STICKY;
}
private void setupMediaPlayer() {
// Recreate player
Bundle playerSettings = (BrandedApplication.getContext().getmTritonPlayer() == null) ? null : BrandedApplication.getContext().getmTritonPlayer().getSettings();
Bundle inputSettings = createPlayerSettings();
if (!Utility.bundleEquals(inputSettings, playerSettings)) {
releasePlayer();
createPlayer(inputSettings);
}
// Start the playback
play();
}
private void setupMediaSession() {
ComponentName receiver = new ComponentName(getPackageName(), RemoteReceiver.class.getName());
mediaSession = new MediaSessionCompat(this, "StreamService", receiver, null);
mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS |
MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
mediaSession.setPlaybackState(new PlaybackStateCompat.Builder()
.setState(PlaybackStateCompat.STATE_PAUSED, 0, 0)
.setActions(PlaybackStateCompat.ACTION_PLAY_PAUSE | PlaybackStateCompat.ACTION_PLAY | PlaybackStateCompat.ACTION_PAUSE)
.build());
mediaSession.setMetadata(new MediaMetadataCompat.Builder()
.putString(MediaMetadataCompat.METADATA_KEY_ARTIST, "Test Artist")
.putString(MediaMetadataCompat.METADATA_KEY_ALBUM, "Test Album")
.putString(MediaMetadataCompat.METADATA_KEY_TITLE, "Test Track Name")
.putLong(MediaMetadataCompat.METADATA_KEY_DURATION, 10000)
.putBitmap(MediaMetadataCompat.METADATA_KEY_ALBUM_ART,
BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))
//.putString(MediaMetadataCompat.METADATA_KEY_DISPLAY_TITLE, "Test Artist")
.build());
AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
audioManager.requestAudioFocus(new AudioManager.OnAudioFocusChangeListener() {
@Override
public void onAudioFocusChange(int focusChange) {
// Ignore
}
}, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
mediaSession.setActive(true);
}
synchronized private void play() {
audioInterrupted = false;
BrandedApplication.getContext().getmTritonPlayer().play();
if(wifiLock != null) {
wifiLock.acquire();
}
if(mediaSession != null) {
mediaSession.setPlaybackState(new PlaybackStateCompat.Builder()
.setState(PlaybackStateCompat.STATE_PLAYING, 0, 1.0f)
.setActions(PlaybackStateCompat.ACTION_PLAY_PAUSE).build());
}
}
synchronized private void stop() {
BrandedApplication.getContext().getmTritonPlayer().stop();
if(wifiLock != null) {
wifiLock.release();
}
if(mediaSession != null) {
mediaSession.setPlaybackState(new PlaybackStateCompat.Builder()
.setState(PlaybackStateCompat.STATE_PAUSED, 0, 0.0f)
.setActions(PlaybackStateCompat.ACTION_PLAY_PAUSE).build());
}
}
private void createPlayer(Bundle settings)
{
BrandedApplication.getContext().setmTritonPlayer(new TritonPlayer(this, settings));
wifiLock = ((WifiManager) getSystemService(Context.WIFI_SERVICE))
.createWifiLock(WifiManager.WIFI_MODE_FULL, "mylock");
AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
int result = audioManager.requestAudioFocus(this, AudioManager.STREAM_MUSIC,
AudioManager.AUDIOFOCUS_GAIN);
BrandedApplication.getContext().getmTritonPlayer().setOnCuePointReceivedListener(this);
BrandedApplication.getContext().getmTritonPlayer().setOnInfoListener(this);
BrandedApplication.getContext().getmTritonPlayer().setOnStateChangedListener(this);
}
protected void releasePlayer() {
if (BrandedApplication.getContext().getmTritonPlayer() != null) {
if(BrandedApplication.getContext().isPlaying()) {
stop();
}
BrandedApplication.getContext().getmTritonPlayer().release();
BrandedApplication.getContext().setmTritonPlayer(null);
}
stopForeground(true);
}
protected Bundle createPlayerSettings() {
// Player Settings
Bundle settings = new Bundle();
// AAC
settings.putString(TritonPlayer.SETTINGS_STATION_MOUNT, getResources().getString(R.string.station_stream_mount) + "AAC");
// MP3
//settings.putString(TritonPlayer.SETTINGS_STATION_MOUNT, mountID);
settings.putString(TritonPlayer.SETTINGS_STATION_BROADCASTER, getResources().getString(R.string.app_name));
settings.putString(TritonPlayer.SETTINGS_STATION_NAME, getResources().getString(R.string.app_name));
return settings;
}
@Override
public void onCuePointReceived(MediaPlayer mediaPlayer, Bundle bundle) {
//System.out.println("TRITON PLAYER BUNDLE " + bundle);
String trackName = "";
String artistName = "";
if(bundle != null) {
if(bundle.containsKey("cue_title") && bundle.containsKey("track_artist_name")) {
if (!bundle.getString("cue_title").isEmpty()) {
trackName = bundle.getString("cue_title");
}
if (!bundle.getString("track_artist_name").isEmpty()) {
artistName = bundle.getString("track_artist_name");
}
}
}
// broadcast out the meta data
Intent i = new Intent(BROADCAST_PLAYER_META);
i.putExtra("trackName", trackName);
i.putExtra("artistName", artistName);
sendBroadcast(i);
// send notification and start as foreground service
PendingIntent pi = PendingIntent.getActivity(getApplicationContext(), 0, new Intent(getApplicationContext(), MainActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
Bitmap icon = BitmapFactory.decodeResource(getResources(),
R.drawable.logo);
String tickerString = "";
String contentString = "Playing";
if(!artistName.isEmpty() && !trackName.isEmpty()) {
tickerString = artistName + " - " + trackName;
contentString += ": " + artistName + " - " + trackName;
}
Intent pauseIntent = new Intent(BROADCAST_PLAYER_PAUSE);
PendingIntent pausePendingIntent = PendingIntent.getBroadcast(this, 0, pauseIntent, 0);
NotificationCompat.Builder notification = new NotificationCompat.Builder(this)
.setContentTitle(getResources().getString(R.string.app_name))
.setTicker(tickerString)
.setContentText(contentString)
.setSmallIcon(R.drawable.ic_launcher)
//.setAutoCancel(true)
//.setLargeIcon(
// Bitmap.createScaledBitmap(icon, 128, 128, false))
.addAction(R.drawable.ic_media_pause, "Pause", pausePendingIntent)
.setContentIntent(pi)
.setStyle(new android.support.v7.app.NotificationCompat.MediaStyle()
//.setShowActionsInCompactView(0)
.setMediaSession(mediaSession.getSessionToken()))
.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
.setOngoing(true);
//notification.setPriority(Notification.PRIORITY_MIN);
notification.setPriority(Notification.PRIORITY_DEFAULT);
startForeground(NOTIFICATION_ID, notification.build());
}
@Override
public void onInfo(MediaPlayer mediaPlayer, int i, int i1) {
}
@Override
public void onStateChanged(MediaPlayer mediaPlayer, int state) {
Log.i(LOG_TAG, "onStateChanged: " + TritonPlayer.debugStateToStr(state));
// broadcast out the player state
Intent i = new Intent(BROADCAST_PLAYER_STATE);
i.putExtra("state", state);
sendBroadcast(i);
}
@Override
public void onAudioFocusChange(int focusChange) {
switch (focusChange) {
case AudioManager.AUDIOFOCUS_GAIN:
// resume playback
System.out.println("AUDIO FOCUS GAIN");
if(audioInterrupted) {
audioInterrupted = false;
if (BrandedApplication.getContext().getmTritonPlayer() == null) {
setupMediaPlayer();
} else if (!BrandedApplication.getContext().isPlaying()) {
setupMediaPlayer();
}
}
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
case AudioManager.AUDIOFOCUS_LOSS:
System.out.println("AUDIO FOCUS LOSS");
// Lost focus for an unbounded amount of time: stop playback and release media player
if (BrandedApplication.getContext().isPlaying()) {
audioInterrupted = true;
releasePlayer();
}
break;
}
}
@Override
public void onDestroy() {
System.out.println("SERVICE STOPPED");
releasePlayer();
mediaSession.release();
}
}
这是 RemoteReceiver.java：
public class RemoteReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_MEDIA_BUTTON.equals(intent.getAction())) {
final KeyEvent event = intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
if (event != null && event.getAction() == KeyEvent.ACTION_DOWN) {
switch (event.getKeyCode()) {
case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
context.startService(new Intent(context, StreamService.class));
break;
}
}
}
}
}