https://blog.wongcw.com/2022/10/03/dynamicspot%e7%b4%af%e8%a8%88%e4%b8%8b%e8%bc%89%e8%b6%85%e7%99%be%e8%90%ac%e6%ac%a1%e8%ae%93android%e4%b9%9f%e8%83%bd%e7%8e%a9%e8%bd%89%e9%9d%88%e5%8b%95%e5%b3%b6/