title: Positioning a dialog on screen
body: <p>I have an activity with MapView. I have overlays on that map and I would like to position a hovering dialog over an item if it is tapped.</p>
  
  <p>I already have my own custom dialog I've made up with my own layout and custom background. My only problem is how to tell Android where (in x, y terms) to position the dialog.</p>
  
  <p>It's even more complicated since to know what's the dialog x, y. I first need to know the dialog's width and height after measurement (since I need that to calculate the position relative to my overlay).</p>