https://blog.wongcw.com/2020/11/22/%e8%b0%b7%e6%ad%8cpixel-2%e7%b3%bb%e5%88%97%e4%b8%89%e5%b9%b4android%e7%b3%bb%e7%b5%b1%e6%9b%b4%e6%96%b0%e6%94%af%e6%8c%81%e7%95%ab%e4%b8%8a%e5%8f%a5%e8%99%9f/