Flutter mac环境配置2020年

1.从 GitHub 上的 Flutter repo获取源代码 wangfeidembp:~ wangfei$ export PUB_HOSTED_URL=https://pub.flutter-io.cn wangfeidembp:~ wangfei$ export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn wangfeidembp:~ wangfei$ git clone https://github.com/flutter/flutter.git -b stable 2.配置环境变量 wangfeidembp:~