SuperSwipeRefreshLayout.java 文件源码

private void startScaleDownReturnToStartAnimation(int from,
                                                  Animation.AnimationListener listener) {
    mFrom = from;
    mStartingScale = ViewCompat.getScaleX(mHeadViewContainer);
    mScaleDownToStartAnimation = new Animation() {
        @Override
        public void applyTransformation(float interpolatedTime,
                                        Transformation t) {
            float targetScale = (mStartingScale + (-mStartingScale * interpolatedTime));
            setAnimationProgress(targetScale);
            moveToStart(interpolatedTime);
        }
    };
    mScaleDownToStartAnimation.setDuration(SCALE_DOWN_DURATION);
    if (listener != null) {
        mHeadViewContainer.setAnimationListener(listener);
    }
    mHeadViewContainer.clearAnimation();
    mHeadViewContainer.startAnimation(mScaleDownToStartAnimation);
}