Windows构建Flutter环境 HTTP Host Availability

Windows构建Flutter环境 HTTP Host Availability

参考文件地址：https://docs.flutter.dev/community/china
图片: HTTP Host Availability异常

修改文件：D:\flutter\packages\flutter_tools\lib\src\http_host_validator.dart

修改内容方便大家复制：
const String kPubDevHttpHost = ‘https://pub.flutter-io.cn/’;
const String kgCloudHttpHost = ‘https://storage.flutter-io.cn/’;

/// Android specific required HTTP hosts.
const List androidRequiredHttpHosts = [‘https://dl.google.com/dl/android/maven2/’,];