SlideInUpAnimatorDecoration.java 文件源码

@Override
protected void prepare(AnimatorSet animatorSet, View target) {
    ViewGroup parent = (ViewGroup) target.getParent();
    int distance = parent.getHeight() - target.getTop();
    animatorSet.playTogether(
            ObjectAnimator.ofFloat(target, "alpha", 0, 1),
            ObjectAnimator.ofFloat(target, "translationY", distance, 0)
    );
}