HTTP host https://maven.google.com/ is not reachable. Reason: An error

原文：https://blog.csdn.net/weixin_47933729/article/details/124755372

flutter 搭建环境出现的问题

问题：

HTTP Host Availability
    ✗ HTTP host https://maven.google.com/ is not reachable. Reason: An error
      occurred while checking the HTTP host: Operation timed out
    ✗ HTTP host https://cloud.google.com/ is not reachable. Reason: An error
      occurred while checking the HTTP host: Operation timed out

 

 

解决：

这个由于国内网络问题，导致 maven.google.com/ 无法访问，需要在flutter sdk 里面的 flutter/packages/flutter_tools/lib/src/http_host_validator.dart 里面的

const List<String> androidRequiredHttpHosts = <String>[
　　'https://maven.google.com/',
];

替换为

const List<String> androidRequiredHttpHosts = <String>[
　　'https://dl.google.com/dl/android/maven2/',
];

然后删除 flutter\bin\cache 目录里面的 flutter_tools.snapshot 文件，重启命令窗口重新检测就会发现已解决即可

至于 cloud.google.com ，暂时没有找到替换的方案，后面用到了再解决。