SwipeRefreshLayout.java 文件源码

private void animateOffsetToStartPosition(int from, AnimationListener listener) {
    if (mScale) {
        // Scale the item back down
        startScaleDownReturnToStartAnimation(from, listener);
    } else {
        mFrom = from;
        mAnimateToStartPosition.reset();
        mAnimateToStartPosition.setDuration(ANIMATE_TO_START_DURATION);
        mAnimateToStartPosition.setInterpolator(mDecelerateInterpolator);
        if (listener != null) {
            mCircleView.setAnimationListener(listener);
        }
        mCircleView.clearAnimation();
        mCircleView.startAnimation(mAnimateToStartPosition);
    }
}