@Override
 public int getCurrentPosition() {
   if (musicService != null && musicBound && musicService.isPng()) {
     return musicService.getPosn();
   } else {
     return 0;
   }
 }
 @Override
 public boolean isPlaying() {
   if (musicService != null && musicBound) {
     return musicService.isPng();
   } else {
     return false;
   }
 }
 @Override
 public int getDuration() {
   if (musicService != null && musicBound && musicService.isPng()) {
     return musicService.getDur();
   } else {
     return 0;
   }
 }