title: What is this persistent in-call/in-progress bar called when a mobile app is backgrounded (iOS and Android)?
body: <p>At least for iOS, apps like Spotify, Hangouts, and Google Maps have a way of showing that they're still active when in the background (when you temporarily leave them to check a different app, etc.). This typically appears as a thicker status bar in iOS.</p>
  
  <p><a href="https://i.stack.imgur.com/EwTP3.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EwTP3.jpg" alt="screenshot showing example of such a bar"></a></p>
  
  <p>Other variants:</p>
  
  <p><a href="https://i.stack.imgur.com/2y0e9.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2y0e9.jpg" alt="enter image description here"></a></p>
  
  <p>What is this bar called, and is this possible to implement for Android? I have a video chat app (in both Google Play and App Store) that uses TokBox (essentially WebRTC), and it renders this bar already for iOS when backgrounded, but not Android.</p>