public void removeUpdateListener(AnimatorUpdateListener listener){
  if (mUpdateListeners == null) {
    return;
  }
  mUpdateListeners.remove(listener);
  if (mUpdateListeners.size() == 0) {
    mUpdateListeners=null;
  }
}

public void removeUpdateListener ( AnimatorUpdateListener listener ) { if ( mUpdateListeners == null ) { return ; } mUpdateListeners . remove ( listener ) ; if ( mUpdateListeners . size ( ) == 0 ) { mUpdateListeners = null ; } }
removes a listener from the set listening to frame updates for this animation .
