What type of objects in Android can continue to exist after the Activity is finished?

In Android, objects of type Service can continue to exist and operate after the Activity has finished. A Service is a component that performs long-running operations in the background without a user interface.

For example, if an app has music that should keep playing even when the user leaves the Activity screen, a Service is used.

An example of creating a simple service:

public class MyService extends Service {
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // Perform background task
        return START_STICKY; // the service will be restarted if the system kills it
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null; // if the service is not bound
    }
}

Thus, the Service continues to work independently of the Activity's lifecycle.