https://www.jianshu.com/p/c4a99fc4a9f6?from=singlemessage
可以发请求,看看是否有新版本(用时间or版本号确定),或 不同版本请求不同url
https://blog.csdn.net/weixin_30512027/article/details/85772097
appcenter
https://github.com/aloisdeniel/flutter_plugin_appcenter
https://buildflutter.com/deploying-flutter-apps-via-appcenter/