How can a service be executed in a separate thread for short-term tasks?

To perform a service in a separate thread for a short-term task in Android, the IntentService class is often used (although it is deprecated, but the concept is useful), or a custom service is created where a new thread is started. The main idea is not to block the main UI thread.

Example using IntentService (deprecated but simple method):

public class MyIntentService extends IntentService {
    public MyIntentService() {
        super("MyIntentService");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        // Short-term task executed in a separate thread
    }
}

If using a regular Service, a new thread can be started inside onStartCommand:

public class MyService extends Service {
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        new Thread(() -> {
            // Short-term task
            stopSelf(); // Stop the service after completion
        }).start();
        return START_NOT_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

Thus, the service performs work in a separate thread, not blocking the UI, and stops after completing the task.