public void removeListener(AnimatorListener listener){
  if (mListeners == null) {
    return;
  }
  mListeners.remove(listener);
  if (mListeners.size() == 0) {
    mListeners=null;
  }
}

public void removeListener ( AnimatorListener listener ) { if ( mListeners == null ) { return ; } mListeners . remove ( listener ) ; if ( mListeners . size ( ) == 0 ) { mListeners = null ; } }
removes a listener from the set listening to this animation .
