title: How to anchor a button at the bottom of a relative layout in android
body: <p>I'm new to the layout structure in android and I'm tasked with building an activity that has a button at the bottom (centered horiz as well) with a small bit of padding between the bottom of the button and the bottom of the visible screen.</p>
  
  <p>The challenge is how to do this in relative layout and make it anchor to the same spot regardless of screen size</p>
  
  <p>If anyone can point me in the right direction that would be great!</p>