执行 flutter doctor 报错 HTTP host maven.google.com is not reachable

Question

安装 flutter 2.10.0 版本，之后执行 flutter doctor 报错：

HTTP host https://maven.google.com/ is not reachable. Reason: An error occurred while checking the HTTP host：信号灯超时时间已到

Answer 1

找到你的 flutter sdk 安装目录，在此目录下找到 \packages\flutter_tools\gradle 文件夹，打开 flutter.gradle 文件,搜索 buildscript，

照此修改

maven { url 'https://maven.aliyun.com/repository/google'}
        maven { url 'https://maven.aliyun.com/repository/jcenter' }
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public'}
        maven { url 'https://dl.google.com/dl/android/maven2/'}

Answer 2

1、把~/packages/flutter_tools/lib/src/http_host_validator.dart里面的https://maven.google.com/改成国内源，比如aliyun/；
2、删除~/bin/cache；
3、重新运行flutter doctor