title: How to create a overlay with help bubbles on Android?
body: <p>I recall seeing some android apps having a help overlay that greys the screen a bit and provides textbubbles with helpfull information pointing to various UI objects.</p>
  
  <p>I thought this to be easy, just create a <code>FrameLayout</code>with 2 layers, 1 content, 1 helpoverlay.
  However, it appears that you can't use a <code>RelativeLayout</code> with items that are based upon another <code>RelativeLayout</code>?</p>
  
  <p>How would I go to position these bubbles? Manually?</p>