private void playAudio(byte[] audio) {
    this.releaseMediaPlayer();

    ByteArrayInputStream inputStream = new ByteArrayInputStream(audio);
    this.mediaPlayer = MediaUtility.createMediaPlayer(inputStream);
    if (this.mediaPlayer != null) {
      this.mediaPlayer.start();
    } else {
      this.showErrorMessage("cannot create MediaPlayer object", null);
    }
  }
 private void releaseMediaPlayer() {
   MediaUtility.releaseMediaPlayer(this.mediaPlayer);
   this.mediaPlayer = null;
 }