title: How to put elements on top of each other in the same xml layout?
body: <p>How can I have more than one button, or a button and a text view in the same location in one layout but one on top of the other?</p>
  
  <p>I want to have a button that is hidden most of the time, but occasionally will have a non intrusive popup that will prompt something. The rest of the time there will be a text view there that is a different size.</p>