title: How to mirror an image file? (2.2+)
body: <p>I have a PNG file that I want to use for an overlay - however, this file has to be mirrored (and rotated by 180°), but in order to save space, I don't want to place the mirrored file in the apk, but do this action programmatically.</p>
  
  <p>How can I do this with Froyo and above?</p>