遍历所有View的两种方式

ArrayList<View> getAllChildren(View v) {

        if (!(v instanceof ViewGroup)) {
            ArrayList<View> viewArrayList = new ArrayList<View>();
            viewArrayList.add(v);
            return viewArrayList;
        }

        ArrayList<View> result = new ArrayList<View>();

        ViewGroup group = (ViewGroup) v;
        for (int i = 0; i < group.getChildCount(); i++) {

            View child = group.getChildAt(i);

            ArrayList<View> viewArrayList = new ArrayList<View>();
            viewArrayList.add(v);
            viewArrayList.addAll(getAllChildren(child));

            result.addAll(viewArrayList);
        }
        return result;
    }

第一种是深度优先遍历所有子view，需要递归调用

ArrayList<View> getAllChildren(View v) {
        ArrayList<View> visited = new ArrayList<View>();
        ArrayList<View> unvisited = new ArrayList<View>();
        unvisited.add(v);

        while (!unvisited.isEmpty()) {
            View child = unvisited.remove(0);
            visited.add(child);
            if (!(child instanceof ViewGroup)){
                continue;
            }
            ViewGroup group = (ViewGroup) child;
            final int childCount = group.getChildCount();
            for (int i=0; i < childCount; i++) {
                unvisited.add(group.getChildAt(i));
            }
        }

        return visited;
    }

第二种方法是宽度优先遍历，只需循环即可

最后编辑：2019-06-28

作者：freeman

这个作者貌似有点懒，什么都没有留下。

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