使用AsyncTask更新FirestoreRecyclerAdapter中的项目

Question

我在一个片段中有一个FirestoreRecyclerAdapter。首先，我从FirestoreRecyclerAdapter填充Firestore中的项，然后为RecyclerView中的每个项填充一个Url到FirebaseStorage并保存记录音频消息。当用户单击我的RecyclerView项内的按钮，并且使AsyncTask与播放此音频相关联时，我如何播放此消息会更新在同一RecyclerView项中找到的SeekBar ？

我已经可以使用MediaPlayer播放音频，但是无法获取AsyncTask更新我的UI。这是我的AsyncTask：

  

公共类MyTask扩展了AsyncTask {

private MediaPlayer mPlayer;
private Callback  mCb;
private FirebaseFirestore db;
private StorageReference storageRef;
private SeekBar seekBar;

private Post post;


public interface Callback {
    void onDataLoaded(Integer result);
}


public MyTask (final Post post, Callback cb, SeekBar seekBar){

    this.post = post;
    this.mCb = cb;
    this.seekBar = seekBar;


    // Initialize media player
    mPlayer = new MediaPlayer();
    mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mp) {

            db = FirebaseFirestore.getInstance();

            DocumentReference postRef = db.collection("Posts")
                    .document(post.getPost_Id());
            Map<String, Object> map = new HashMap<>();
            map.put("score", FieldValue.increment(2));
            map.put("listens", FieldValue.increment(1));
            postRef.update(map);
        }



    });
}

@Override
protected String doInBackground(String... strings) {

    mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    try{ mPlayer.setDataSource(strings[0]);} catch (Exception e) {e.printStackTrace();}
    // wait for media player to get prepare
    mPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp) {
            mp.start();
            // Get the current audio stats

            for(int i =0; i<mp.getDuration(); i = mp.getCurrentPosition()) {
                //int duration = mPlayer.getDuration() / 1000; // In milliseconds
                //int due = (mPlayer.getDuration() - mPlayer.getCurrentPosition()) / 1000;
                //int pass = duration - due;

                int mCurrentPosition = mp.getCurrentPosition(); // In milliseconds

                //seekBar.setProgress(mCurrentPosition);
                publishProgress(mCurrentPosition);

                try {
                    Thread.sleep(1);
                } catch (Exception e){
                    e.printStackTrace();
                }

            }

        }
    });
    mPlayer.prepareAsync();
    return null;
}

@Override
protected void onProgressUpdate(Integer... values) {
    super.onProgressUpdate(values);
    //Using the callback, I get data logged on the console but the 
    //item on the RecyclerView is not updated
    mCb.onDataLoaded(values[0]);
    //Pass the Seekbar to the AsyncTas doesnt update
    //seekBar.setProgress(values[0]);
}

@Override
protected void onPostExecute(String s) {
    super.onPostExecute(s);
} }

我在Callback的{​​{1}}中实现了ViewHolder接口。这是我的适配器：

FirestoreRecyclerAdapter

private class PostViewHolder extends RecyclerView.ViewHolder implements MyTask.Callback { private PostViewHolder holder; private LinearLayout root, llp,; private RelativeLayout rlp; private TextView tv_due, tv_pass; private Button btn_play; private SeekBar seekBar; private FirebaseFirestore db; private final StorageReference storageRef; public PostViewHolder(@NonNull View itemView) { super(itemView); root = itemView.findViewById(R.id.list_root); llp = root.findViewById(R.id.llp); rlp = root.findViewById(R.id.rlp); btn_play = llp.findViewById(R.id.btn_play); tv_due = rlp.findViewById(R.id.tv_due); tv_pass = rlp.findViewById(R.id.tv_pass); seekBar = rlp.findViewById(R.id.seek_bar); db = FirebaseFirestore.getInstance(); storageRef = FirebaseStorage.getInstance().getReference(); } @Override public void onDataLoaded(Integer result) { Log.d("NEW TAG", result.toString()); holder.seekBar.setProgress(result); } void setData(final Post post, final PostViewHolder holder) { this.holder = holder; btn_play.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (btn_play.getText().equals("Play")) { playMusic(seekBar, tv_pass, tv_due, post, mPlayer, holder); } } }); seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int i, boolean b) { if(mPlayer!=null && b){ mPlayer.seekTo(i*1000); } } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { } }); } } 如下：

playMusic()