How to make Service that is unremovable even if killed by the system?

Question

I am creating a Blue light filter app. So that, I want to display the view over all the apps. I did it by the following Service,

public class OverlayService exte         


        

Answer 1

Try this add this method in service class

@Override
public void onTaskRemoved(Intent rootIntent){
    super.onTaskRemoved(rootIntent);
 }