title: Position Buttons in a Circle Around a Button
body: <p>I want to place some (a variable number of!) buttons in a circle around a button in the center. It should be flexible enough that I can easily add one button more in the circle or remove one.
  I'd also maybe like to add some animation in the future: the buttons should appear from one side and then circle around the button in the center.</p>
  
  <p>It would be extremely easy to implement but android somehow doesn't allow to set absolute positions.</p>
  
  <p>I mean I can easily calculate the positions where the buttons should be on the circle but how can I the place them there?</p>
  
  <p>By the way, I don't want to add the buttons dynamically they are already on the view (wie View.INVISIBLE).</p>
  
  <p>thanks for your help</p>