title: What's the name of this drop-out menu?
body: <p>i've seen this cool kind of menu in different apps, so i guess it is part of the android SDK. but i could not figure out its name. anyone already used it and knows how to create it?</p>
  
  <p><img src="https://i.stack.imgur.com/NwfYE.png" alt="Drop-out menu"></p>