이전 버전과의 호환성을 유지하면서 Android에서 AsyncTask를 java.util.concurrent로 효과적으로 대체하려면 어떻게 해야 합니까?

private static class LongRunningTask extends AsyncTask<String, Void, MyPojo> {
    private static final String TAG = MyActivity.LongRunningTask.class.getSimpleName();
    private WeakReference<MyActivity> activityReference;

    LongRunningTask(MyActivity context) {
        activityReference = new WeakReference<>(context);
    }

    @Override
    protected MyPojo doInBackground(String... params) {
        // Some long running task
    }

    @Override
    protected void onPostExecute(MyPojo data) {
        MyActivity activity = activityReference.get();
        activity.progressBar.setVisibility(View.GONE);
        populateData(activity, data);
    }
}

ExecutorService executor = Executors.newSingleThreadExecutor();
Handler handler = new Handler(Looper.getMainLooper());

executor.execute(new Runnable() {
    @Override
    public void run() {
        // Background work here

        handler.post(new Runnable() {
            @Override
            public void run() {
                // UI Thread work here
            }
        });
    }
});

ExecutorService executor = Executors.newSingleThreadExecutor();
Handler handler = new Handler(Looper.getMainLooper());

executor.execute(() -> {
    // Background work here
    handler.post(() -> {
        // UI Thread work here
    });
});