CircularRevealLayout.java 文件源码

public void hide (float positionFromRight, int animationDuration) {
    View revealingView = circularRevealViewContainer.getChildAt(0);

    int cx = revealingView.getWidth() - (int) (positionFromRight);

    int cy = (revealingView.getTop() + revealingView.getBottom()) / 2;

    int dx = Math.max(cx, revealingView.getWidth() - cx);
    int dy = Math.max(cy, revealingView.getHeight() - cy);

    float finalRadius = (float) Math.hypot(dx, dy);

    Animator animator;
    animator = io.codetail.animation.ViewAnimationUtils
            .createCircularReveal(revealingView, cx, cy, finalRadius, 0);
    animator.setInterpolator(new AccelerateDecelerateInterpolator());
    animator.setDuration(animationDuration);
    revealingView.setVisibility(View.GONE);
    animator.start();
}