Control the default music player of android or any other music player

AudioManager mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);

if(mAudioManager.isMusicActive()) {
    Intent i = new Intent(SERVICECMD);
    i.putExtra(CMDNAME , CMDSTOP );
    YourApplicationClass.this.sendBroadcast(i);
}

you can by getting the audiomanager then sending commands to it.

these are the commands.

 public static final String CMDTOGGLEPAUSE = "togglepause";
 public static final String CMDPAUSE = "pause";
 public static final String CMDPREVIOUS = "previous";
 public static final String CMDNEXT = "next";
 public static final String SERVICECMD = "com.android.music.musicservicecommand";
 public static final String CMDNAME = "command";
 public static final String CMDSTOP = "stop";

Problem with sending Intent for broadcast receiver is that, user has to open Music Player at least once, also, It does not work for many third party music players.

The code given below works on all music players.

long eventtime = SystemClock.uptimeMillis();

Intent downIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE, 0);
downIntent.putExtra(Intent.EXTRA_KEY_EVENT, downEvent);
sendOrderedBroadcast(downIntent, null);

Intent upIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
KeyEvent upEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE, 0);
upIntent.putExtra(Intent.EXTRA_KEY_EVENT, upEvent);
sendOrderedBroadcast(upIntent, null);

/*NEXT*/
Intent downIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN,   KeyEvent.KEYCODE_MEDIA_NEXT, 0);
downIntent.putExtra(Intent.EXTRA_KEY_EVENT, downEvent);
sendOrderedBroadcast(downIntent, null);

/*PREVIOUS*/
Intent downIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PREVIOUS, 0);
downIntent.putExtra(Intent.EXTRA_KEY_EVENT, downEvent);
sendOrderedBroadcast(downIntent, null);

I have tested this code on Sony, Htc and Samsung devices.

This code imitates play/pause button action from hands-free(ear phones).