找到安装flutter sdk的文件夹 flutter\packages\flutter_tools\gradle下的flutter.gradle，把MAVEN_REPO的值修改为https://mirrors.tuna.tsinghua.edu.cn/flutter/download.flutter.io
private static final String MAVEN_REPO = "https://mirrors.tuna.tsinghua.edu.cn/flutter/download.flutter.io"
然后把flutter\packages\flutter_tools\gradle下的resolve_dependencies的url值改为https://mirrors.tuna.tsinghua.edu.cn/flutter/download.flutter.io
google()
jcenter()
maven {
url "https://mirrors.tuna.tsinghua.edu.cn/flutter/download.flutter.io"
}
}
编译完成....运行，解决
