private void initiatePlayButtonState() {
   if (mMediaService.isPlaying()) {
     mPlayButton.setImageResource(R.drawable.ic_pause_black_36dp);
   } else if (mIsCompletedPlaying) {
     mPlayButton.setImageResource(R.drawable.ic_replay_black_36dp);
   } else if (mMediaService.isPaused()) {
     mPlayButton.setImageResource(R.drawable.ic_play_black_36dp);
   }
 }