DonationActivity.java 文件源码

private void playInitAnimation() {
    DisplayMetrics dm = getResources().getDisplayMetrics();
    // Get the center for the FAB
    int cx = dm.widthPixels / 2;
    int cy = 0;

    float finalRadius = dm.heightPixels;

    revealTransition = ViewAnimationUtils.createCircularReveal(mainContentLayout, cx, cy, 0, finalRadius);
    revealTransition.setInterpolator(new AccelerateDecelerateInterpolator());
    revealTransition.setDuration(800);
    revealTransition.addListener(new SupportAnimator.AnimatorListener() {
        @Override
        public void onAnimationStart() {
            mainContentLayout.setVisibility(View.VISIBLE);
        }
        public void onAnimationEnd() {}
        public void onAnimationCancel() {}
        public void onAnimationRepeat() {}
    });
    revealTransition.start();
}