SwipeRefreshLayout.java 文件源码

private void startScaleDownAnimation(AnimationListener listener) {
    this.mScaleDownAnimation = new Animation() {
        public void applyTransformation(float interpolatedTime, Transformation t) {
            SwipeRefreshLayout.this.setAnimationProgress(1.0f - interpolatedTime);
        }
    };
    this.mScaleDownAnimation.setDuration(150);
    this.mCircleView.setAnimationListener(listener);
    this.mCircleView.clearAnimation();
    this.mCircleView.startAnimation(this.mScaleDownAnimation);
}