Android AsyncTask is Deprecated: Here’s another way

AsyncTask.md

According to the Android documentation AsyncTask was deprecated in API level 30 and it is suggested to use the standard java.util.concurrent or Kotlin concurrency utilities instead.

AsyncTasks.java

public abstract class AsyncTasks<Params, Result> {

    private final ExecutorService executors;

    public AsyncTasks() {
        this.executors = Executors.newSingleThreadExecutor();
    }

    @SafeVarargs
    private final void startBackground(Params... params) {
        onPreExecute();
        executors.execute(() -> {
            Result result = doInBackground(params);
            new Handler(Looper.getMainLooper()).post(() -> onPostExecute(result));
        });
    }

    @SafeVarargs
    public final void execute(Params... params) {
        startBackground(params);
    }

    public void shutdown() {
        executors.shutdown();
    }

    public boolean isShutdown() {
        return executors.isShutdown();
    }

    @SuppressWarnings("unchecked")
    protected abstract Result doInBackground(Params... params);

    protected void onPreExecute() {}

    protected void onPostExecute(Result result) {}
}

MainActivity.java

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //...

        // Simply call to execute task
        new MyTask().execute();
    }

    /**
     * Sub-class of AsyncTask
     */
    private class MyTask extends AsyncTasks<Void, String> {

        @Override
        protected void onPreExecute() {
            // Before execution
        }

        @Override
        protected String doInBackground(Void... args) {
            // Background task here
            return "TASK_COMPLETE";
        }

        @Override
        protected void onPostExecute(String result) {
            // UI task here
        }
    }
}