private void t() {

        viewGroup viewGroup=new viewGroup("layout");
        viewGroup.addView(new view("image"));
        viewGroup.addView(new view("txt"));
        viewGroup viewGroup1=new viewGroup("frame");
        viewGroup1.addView(viewGroup);
        viewGroup1.addView(new view("list"));
        Log.i(TAG, "t: "+viewGroup1.list.toString());

    }

    abstract class viewElement{
        protected List<viewElement> list=new ArrayList<>();
        protected String name;

        public String getName() {
            return name;
        }

        public viewElement(String name) {
            this.name = name;
        }

        public abstract void addView(viewElement view);

        public abstract void removeView(viewElement view);



    }

    class view extends viewElement{

        public view(String name) {
            super(name);
        }

        @Override
        public void addView(viewElement view) {
            Log.i(TAG, "addView: no support");
        }

        @Override
        public void removeView(viewElement view) {
            Log.i(TAG, "removeView: no support");
        }

        @Override
        public String toString() {
            return "view{" +
                    "name='" + name + '\'' +
                    '}';
        }
    }

    class viewGroup extends viewElement{

        public viewGroup(String name) {
            super(name);
        }

        @Override
        public void addView(viewElement view) {
            list.add(view);
        }

        @Override
        public void removeView(viewElement view) {
            list.remove(view);
        }

        @Override
        public String toString() {
            return "viewGroup{" +
                    "name='" + name + '\'' +
                    '}';
        }
    }