递归获取View的子View数

1.递归方式

    public static int  getViewCountByRecursive(View root){
        int viewCount = 0;

        if (null == root){
            return 0;
        }

        viewCount++;
        if (root instanceof ViewGroup){
            for (int i = 0; i < ((ViewGroup) root).getChildCount(); i++) {

                View child = ((ViewGroup) root).getChildAt(i);
                if (child instanceof ViewGroup){
                    viewCount += getViewCountByRecursive(child);
                }else {
                    viewCount++;
                }

            }
        }

        return viewCount;
    }

2.非递归方式

    public static int  getViewCount(View root){
        int viewCount = 0;
        if (null == root){
            return 0;
        }
        viewCount++;
        if (root instanceof ViewGroup){
            LinkedList<ViewGroup> queue = new LinkedList<>();
            queue.add((ViewGroup) root);
            while (!queue.isEmpty()){
                ViewGroup parent = queue.removeFirst();
                for (int i = 0; i < parent.getChildCount(); i++) {
                    viewCount++;
                    View child = parent.getChildAt(i);
                    if (child instanceof ViewGroup){
                        queue.add((ViewGroup) child);
                    }
                }


            }
        }
        return viewCount;
    }