public void apply(ViewPropertyAnimator animator,float currValue,float endValue,float velocity){
  apply(animator,currValue,endValue,velocity,Math.abs(endValue - currValue));
}

public void apply ( ViewPropertyAnimator animator , float currValue , float endValue , float velocity ) { apply ( animator , currValue , endValue , velocity , Math . abs ( endValue - currValue ) ) ; }
applies the interpolator and length to the animator , such that the fling animation is consistent with the finger motion .
