/** * Update the current media player state, optionally showing an error message. * * @param error if not null, error message to present to the user. */ private void updatePlaybackState(String error) { LogHelper.d(TAG, "updatePlaybackState, playback state=" + mPlayback.getState()); long position = PlaybackState.PLAYBACK_POSITION_UNKNOWN; if (mPlayback != null && mPlayback.isConnected()) { position = mPlayback.getCurrentStreamPosition(); } PlaybackState.Builder stateBuilder = new PlaybackState.Builder().setActions(getAvailableActions()); setCustomAction(stateBuilder); int state = mPlayback.getState(); // If there is an error message, send it to the playback state: if (error != null) { // Error states are really only supposed to be used for errors that cause playback to // stop unexpectedly and persist until the user takes action to fix it. stateBuilder.setErrorMessage(error); state = PlaybackState.STATE_ERROR; } stateBuilder.setState(state, position, 1.0f, SystemClock.elapsedRealtime()); // Set the activeQueueItemId if the current index is valid. if (QueueHelper.isIndexPlayable(mCurrentIndexOnQueue, mPlayingQueue)) { MediaSession.QueueItem item = mPlayingQueue.get(mCurrentIndexOnQueue); stateBuilder.setActiveQueueItemId(item.getQueueId()); } mSession.setPlaybackState(stateBuilder.build()); if (state == PlaybackState.STATE_PLAYING || state == PlaybackState.STATE_PAUSED) { mMediaNotificationManager.startNotification(); } }