FlyRefreshStyleActivity.java 文件源码

private void bounceAnimateView(final View view) {
    if (view == null) {
        return;
    }

    ValueAnimator swing = ValueAnimator.ofFloat(0, 60, -40, 0);
    swing.setDuration(400);
    swing.setInterpolator(new AccelerateInterpolator());
    swing.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        @Override
        public void onAnimationUpdate(ValueAnimator animation) {
            view.setRotationX((float)animation.getAnimatedValue());
        }
    });
    swing.start();
}