Will Executor with handler cause memory leak in android

Question

I am doing my DAO queries from Room Database inside Executors and updating the UI in handler.post() method. Is it considered a bad practice or is there any way it will cause memory leak?

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Handler handler = new Handler(Looper.getMainLooper());
    Executors.newSingleThreadExecutor().execute(() -> {
        //do dao queries here, get recyclerview data from database

        handler.post(() -> {
            //updating the UI, update the recyclerview, set adapter to the recyclerview
        });

    });}

Will this thread created using Executors be garbage collected when the OnDestroy method is called?