title: How to create a floating view over another view in android
body: <p>I don't know exaclty how it is called, but I got a screenshot:
  <a href="https://i.stack.imgur.com/HsMVU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HsMVU.png" alt="Screenshot"></a></p>
  
  <p>Basically, in this case, I press a button and this window from "FC Barcelona" pops up, occupying about 3/4 of the screen. After it is opened I can drag it up and down. If I drag it up, it occupies the whole screen, if I drag it down, it disappear.</p>
  
  <p>How can I use this tool or how it is called in android?</p>