获得activity的rootview

scucheri

于 2016-04-16 21:46:07 发布

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分类专栏：技术android rootview

本文链接：https://blog.youkuaiyun.com/u013708985/article/details/51170435

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   @NonNull
    public static FrameLayout getRootFrame(@NonNull Activity activity) {
        View re = activity.findViewById(android.R.id.content);
        if (re != null && re instanceof FrameLayout) {
            return (FrameLayout) re;
        }
        ViewGroup viewGroup = (ViewGroup) activity.getWindow().getDecorView();
        re = viewGroup.getChildAt(viewGroup.getChildCount() - 1);
        if (re != null && re instanceof FrameLayout) {
            return (FrameLayout) re;
        } else {
            re = new FrameLayout(activity);
            activity.getActionBar().getHeight();
            ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT
                    , ViewGroup.LayoutParams.MATCH_PARENT);
            viewGroup.addView(re, lp);
            return (FrameLayout) re;
        }
    }