I will try to provide a solution that I have used and most of the music player also use the same technique to show player controls in notification bar.
I am running a service which is used to manage Media Player and all its controls. Activity User control interacts with Service by sending Intents to the service for example
Intent i = new Intent(MainActivity.this, MyRadioService.class);
i.setAction(Constants.Player.ACTION_PAUSE);
startService(i);
TO receive intents and perform action in Service class I am using following code in onStartCommand method of Service
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (intent.getAction().equals(Constants.Player.ACTION_PAUSE)) {
if(mediaPlayer.isPlaying()) {
pauseAudio();
}
}
Now to exact answer to your question to show notification with playing controls. You can call following methods to show notification with controls.
// showNotification
private void startAppInForeground() {
// Start Service in Foreground
// Using RemoteViews to bind custom layouts into Notification
RemoteViews views = new RemoteViews(getPackageName(),
R.layout.notification_status_bar);
// Define play control intent
Intent playIntent = new Intent(this, MyRadioService.class);
playIntent.setAction(Constants.Player.ACTION_PLAY);
// Use the above play intent to set into PendingIntent
PendingIntent pplayIntent = PendingIntent.getService(this, 0,
playIntent, 0);
// binding play button from layout to pending play intent defined above
views.setOnClickPendingIntent(R.id.status_bar_play, pplayIntent);
views.setImageViewResource(R.id.status_bar_play,
R.drawable.status_bg);
Notification status = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
status = new Notification.Builder(this).build();
}
status.flags = Notification.FLAG_ONGOING_EVENT;
status.icon = R.mipmap.ic_launcher;
status.contentIntent = pendingIntent;
startForeground(Constants.FOREGROUND_SERVICE, status);
}
Hope this really helps you. And you will be able to achieve what you want. Have a Happy Coding :)