https://blog.wongcw.com/2020/05/30/%e8%b0%b7%e6%ad%8c%e6%8e%a8%e9%81%b2android-11-beta%e7%99%bc%e5%b8%83%ef%bc%9a%e5%9b%a0%e7%be%8e%e5%9c%8b%e5%a4%9a%e5%9c%b0%e7%88%86%e7%99%bc%e6%8a%97%e8%ad%b0%e7%ad%89%e6%b4%bb%e5%8b%95/