MainActivity.java

@SuppressLint("StaticFieldLeak")
    public void initializeManagerAndGetPlayList(final Context context) {
        new AsyncTask<Void, Void, Void>() {
            @Override
            protected Void doInBackground(Void... voids) {
                HwAudioPlayerConfig hwAudioPlayerConfig = new HwAudioPlayerConfig(context);
                HwAudioManagerFactory.createHwAudioManager(hwAudioPlayerConfig, new HwAudioConfigCallBack() {
                    @RequiresApi(api = Build.VERSION_CODES.R)
                    @Override
                    public void onSuccess(HwAudioManager hwAudioManager) {
                        try {
                            mHwAudioManager = hwAudioManager;
                            mHwAudioPlayerManager = hwAudioManager.getPlayerManager();
                            mHwAudioConfigManager = hwAudioManager.getConfigManager();
                            mHwAudioQueueManager = hwAudioManager.getQueueManager();

                            playList = getLocalPlayList(MainActivity.this);

                            if (playList.size() > 0) {
                                Collections.sort(playList, new Comparator<HwAudioPlayItem>() {
                                    @Override
                                    public int compare(final HwAudioPlayItem object1, final HwAudioPlayItem object2) {
                                        return object1.getAudioTitle().compareTo(object2.getAudioTitle());
                                    }
                                });
                            }

                            doListenersAndNotifications(MainActivity.this);
                          
                        } catch (Exception e) {
                            Log.e("TAG", "player init fail", e);
                        }
                    }
                    @Override
                    public void onError(int errorCode) {
                        Log.e("TAG", "init err:" + errorCode);
                    }
                });
                return null;
            }
            @Override
            protected void onPostExecute(Void aVoid) {
                addListener(mPlayListener); //method coming up in the second part
                
                PlaylistAdapter playlistAdapter = new PlaylistAdapter(playList);
                RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(MainActivity.this);
                binding.playlistRecyclerView.setLayoutManager(layoutManager);
                playlistAdapter.setOnItemClickListener(MainActivity.this);
                binding.playlistRecyclerView.setAdapter(playlistAdapter);

                super.onPostExecute(aVoid);
            }
        }.execute();
    }