https://blog.wongcw.com/2020/06/13/%e4%b8%80%e5%8a%a08-android-11-beta%e7%89%88%e4%b8%ad%e5%87%ba%e7%8f%be%e7%9c%9f%e7%84%a1%e7%b7%9a%e8%80%b3%e6%a9%9f%e7%b7%9a%e7%b4%a2/