MainActivity.java

@Override
    public void onItemClick(List<HwAudioPlayItem> myPlayList, int position) {
        if (mHwAudioPlayerManager != null && mHwAudioQueueManager != null && mHwAudioQueueManager.getAllPlaylist() != null) {
             /*
             * 1. Obtains a playlist using the mHwAudioQueueManager.getAllPlaylist() method.
             * 2. Compare myPlayList with mHwAudioQueueManager.
             */
            if (mHwAudioQueueManager.getAllPlaylist() == myPlayList) {
                //If the two playlists are the same, the user-specified song is played.
                mHwAudioPlayerManager.play(position);
            } else {
                //If the two playlists are different, the mHwAudioPlayerManager playlist is updated.
                //The music specified by the user is played.
                mHwAudioPlayerManager.playList(playList, position, 0);
                mHwAudioPlayerManager.setPlayMode(0);
                mHwAudioQueueManager.setPlaylist(playList);
                Log.w("Playlist", mHwAudioQueueManager.getAllPlaylist() + "");
            }

        }
    }

    /*
    @Override
    public void onItemClick(int position) {
        if(mHwAudioPlayerManager != null){
            mHwAudioPlayerManager.play(position);
        }
    }*/