MainActivity.java

HwAudioStatusListener mPlayListener = new HwAudioStatusListener() {
  @Override
  public void onSongChange(HwAudioPlayItem hwAudioPlayItem) {
      setSongDetails(hwAudioPlayItem);
      if(mHwAudioPlayerManager.getOffsetTime() != -1 && mHwAudioPlayerManager.getDuration() != -1)
          updateSeekBar(mHwAudioPlayerManager.getOffsetTime(), mHwAudioPlayerManager.getDuration());
  }

  @Override
  public void onQueueChanged(List<HwAudioPlayItem> list) {
      if (mHwAudioPlayerManager != null && list.size() != 0 && !isReallyPlaying) {
          mHwAudioPlayerManager.play();
          isReallyPlaying = true;
          binding.playButtonImageView.setImageDrawable(getDrawable(R.drawable.btn_playback_pause_normal));
      }
  }

  @Override
  public void onBufferProgress(int percent) {
  }

  @Override
  public void onPlayProgress(final long currentPosition, long duration) {
      updateSeekBar(currentPosition, duration);
  }

  @Override
  public void onPlayCompleted(boolean isStopped) {
      if (mHwAudioPlayerManager != null && isStopped) {
          mHwAudioPlayerManager.playNext();
      }
      isReallyPlaying = !isStopped;
  }

  @Override
  public void onPlayError(int errorCode, boolean isUserForcePlay) {
      Toast.makeText(MainActivity.this, "We cannot play this!!", Toast.LENGTH_LONG).show();
  }

  @Override
  public void onPlayStateChange(boolean isPlaying, boolean isBuffering) {
      if(isPlaying || isBuffering){
          binding.playButtonImageView.setImageDrawable(getDrawable(R.drawable.btn_playback_pause_normal));
          isReallyPlaying = true;
      }
      else{
          binding.playButtonImageView.setImageDrawable(getDrawable(R.drawable.btn_playback_play_normal));
          isReallyPlaying = false;
      }

  }
  };