title: On an android Canvas, how do I draw overlapping shapes with non-interacting alphas?
body: <p>On an android Canvas, if I draw a circle with alpha 0xCC and color Color.RED and then draw another circle which partially overlaps the first circle with the same parameters, I'll end up with a venn diagram.</p>
  
  <p>Here is a random example I found (just ignore the [Text] in there). I want to draw overlapping circles like in this diagram, but I don't want the center to be darker, but I do want the whole thing to have alpha so that the map underneath is visible.</p>
  
  <p><img src="https://www.internet4classrooms.com/images/07_venn_predrawn.gif"></p>
  
  <p>Is there a way to do this directly or do I need to draw to a bitmap without alpha and then set the alpha for the whole bitmap and draw it to a canvas? (I haven't used bitmaps yet, so I am not sure how they are used yet.)</p>