title: Listener for ViewFlipper widget flipping events
body: <p>I have a ViewFlipper implementation that needs to be improved. This ViewFlipper has three child views. Basically, I want an indicator on which child view is currently active. My ViewFlipper is just a part of a complex layout which also has list views, etc.</p>
  
  <p>Switching of views is also automatic and done in a specified interval.</p>
  
  <p>From Android's SDK reference, I haven't seen any listener for when the ViewFlipper changes the child view.</p>
  
  <p>Do you guys know of a way I can have a listener for that event?</p>
  
  <p>Or are there alternative ways I can implement this feature besides using ViewFlipper ?</p>
  
  <p>Thanks!</p>