ps. x=time, y=distance
AccelerateDecelerateInterpolator
AccelerateInterpolator
DecelerateInterpolator
AnticipateInterpolator
AnticipateOvershootInterpolator
BounceInterpolator 弹跳
CycleInterpolator 循环
OvershootInterpolator
原文：http://www.cnblogs.com/iljyya/p/4770685.html