AnimationManager.java 文件源码

public void startYAnimation(float yFrom, float yTo) {
    stopAll();
    animation = ValueAnimator.ofFloat(yFrom, yTo);
    YAnimation yAnimation = new YAnimation();
    animation.setInterpolator(new DecelerateInterpolator());
    animation.addUpdateListener(yAnimation);
    animation.addListener(yAnimation);
    animation.setDuration(400);
    animation.start();
}