CircleMenu.java 文件源码

/**
 * 启动取消动画
 */
private void startCancelMenuAnima() {
    ValueAnimator cancelAnima = ValueAnimator.ofFloat(1.f, 100.f);
    cancelAnima.setDuration(500);
    cancelAnima.setInterpolator(new AnticipateInterpolator());
    cancelAnima.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        @Override
        public void onAnimationUpdate(ValueAnimator valueAnimator) {
            fraction = valueAnimator.getAnimatedFraction();
            itemMenuRadius = (1 - fraction) * partSize;
            itemIconSize = (int) ((1 - fraction) * iconSize);
            invalidate();
        }
    });
    cancelAnima.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            status = STATUS_MENU_CLOSED;
            if (onMenuStatusChangeListener != null)
                onMenuStatusChangeListener.onMenuClosed();
        }
    });
    cancelAnima.start();
}