MusicPlayerPresenterImpl.java

	// this is the service that plays the audio
	private ServiceConnection audioServiceConnection = new ServiceConnection() {

		public void onServiceConnected(ComponentName componentName, IBinder binder) {

			mediaController = getMediaController(view.getApplicationContext());

			Log.d(TAG, "audio service connected");
			//noinspection unchecked
			audioService = ((SimpleBinder<AudioService>) binder).getService();

			serviceConnected();

			view.anchorMediaController(mediaController);

			mediaController.setMediaPlayer(audioService);
			mediaController.setEnabled(true);
			mediaController.setPrevNextListeners(
					new View.OnClickListener() {
						@Override
						public void onClick(View v) {
							playNext();
						}
					},
					new View.OnClickListener() {
						@Override
						public void onClick(View v) {
							playPrevious();
						}
					}
			);

			Log.d(TAG, "mediaController: " + mediaController);
		}

		public void onServiceDisconnected(ComponentName componentName) {
			Log.d(TAG, "service disconnected");
			audioService = null;
		}
	};