参考页面：https://www.jianshu.com/p/147f0e20c312
flutter安装库 flutter packages get
一直安装不上，时间又很长
Running "flutter packages get" in project_name...
mac、linux上解决方案：
在环境变量中添加以下：
export PUB_HOSTED_URL=https://pub.flutter-io.cn export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn
windows的我没试过
PUB_HOSTED_URL ===== https://pub.flutter-io.cn FLUTTER_STORAGE_BASE_URL ===== https://storage.flutter-io.cn
下载成功后会出现 Process finished with exit code 0
我保存后依然没有效果，重启就好了