GestureRefreshLayout.java 文件源码

private void startScaleDownAnimation(Animation.AnimationListener listener) {
    mScaleDownAnimation = new Animation() {
        @Override
        public void applyTransformation(float interpolatedTime, Transformation t) {
            setAnimationProgress(1 - interpolatedTime);
        }
    };
    mScaleDownAnimation.setDuration(SCALE_DOWN_DURATION);
    mScaleDownAnimation.setAnimationListener(listener);
    mRefreshView.clearAnimation();
    mRefreshView.startAnimation(mScaleDownAnimation);
}