title: How to detect when my Activity has been obscured?
body: <p>I would like to be able to detect if my Activity has been obscured by, say, a system alert or some other overlay (for example the power menu when I long press on the power button), or some malware that detects the launch of my Activity. I noticed that the foreground app in this case would still be my app, so I can't simply base it on what the foreground app is. I also notice that onPause() isn't called when my Activity is obscured, so I can't put any logic in onPause() either. Even if I can though, I would then have to differentiate between a system alert/overlay and the user pressing the back/home button.</p>
  
  <p>Are there any other ways for me to accomplish this?</p>