https://blog.wongcw.com/2021/04/08/3%e6%9c%88android%e6%80%a7%e5%83%b9%e6%af%94%e6%a6%9c%ef%bc%9a%e6%97%97%e8%89%a6%e8%8a%af%e5%86%8d%e4%b8%8b%e6%8e%a2%e3%80%811999%e5%85%83%e6%89%80%e5%90%91%e6%8a%ab%e9%9d%a1/