title: FloatingActionButton icon animation (Android FAB src drawable animation)
body: <p>I was trying to find documentation about how to create icon animation of FAB's (of the Design support library), after searching a while i couldn't find any information about it and the AnimationDrawable reference in android developers doesn't work for FAB's even if the class is a child of ImageView. </p>
  
  <p>but manage to get a workaround that works just fine. </p>