SwipeRefreshLayout.java 文件源码

private void startScaleUpAnimation(AnimationListener listener) {
    this.mCircleView.setVisibility(0);
    if (VERSION.SDK_INT >= 11) {
        this.mProgress.setAlpha(255);
    }
    this.mScaleAnimation = new Animation() {
        public void applyTransformation(float interpolatedTime, Transformation t) {
            SwipeRefreshLayout.this.setAnimationProgress(interpolatedTime);
        }
    };
    this.mScaleAnimation.setDuration((long) this.mMediumAnimationDuration);
    if (listener != null) {
        this.mCircleView.setAnimationListener(listener);
    }
    this.mCircleView.clearAnimation();
    this.mCircleView.startAnimation(this.mScaleAnimation);
}