View到达顶部及底部边界判断

判断View是否滑动到顶部

     /**
     * 判断View是否滑动到顶部
     * @param view
     * @return
     */
   public static  boolean isViewReachTopEdge(V view) {
        if (view instanceof ViewGroup) {
            if (view.canScrollVertically(-1))
                return false;
            int count  = ((ViewGroup)view).getChildCount();
            for (int i = 0; i < count; i++) {
                if (!isViewReachTopEdge(((ViewGroup)view).getChildAt(i)))  //递归子View
                    return false;
            }
        }
        if (view.canScrollVertically(-1)) {
            return false;
        }
        return true;
    }

判断View是否滑动到底部

    /**
     * 判断View是否滑动到底部
     * @param view
     * @return
     */
    public static  boolean isViewReachBottomEdge(V view) {
        if (view instanceof ViewGroup) {
            if (view.canScrollVertically(1))
                return false;
            int count  = ((ViewGroup)view).getChildCount();
            for (int i = 0; i < count; i++) {
                if (!isViewReachBottomEdge(((ViewGroup)view).getChildAt(i)))  //递归子View
                    return false;
            }
        }
        if (view.canScrollVertically(1)) {
            return false;
        }
        return true;
    }```