LoaderController.java 文件源码

private void setValueAnimator(float begin, float end, int repeatCount) {
    valueAnimator = ValueAnimator.ofFloat(begin, end);
    valueAnimator.setRepeatCount(repeatCount);
    valueAnimator.setDuration(ANIMATION_CYCLE_DURATION);
    valueAnimator.setRepeatMode(ValueAnimator.REVERSE);
    valueAnimator.setInterpolator(new LinearInterpolator());
    valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        @Override
        public void onAnimationUpdate(ValueAnimator animation) {
            progress = (float) animation.getAnimatedValue();
            loaderView.invalidate();
        }
    });
}