flutter pub.get 没有反应

$ sudo vim /etc/profile  # 尾部添加

export PATH=XXX/flutter/bin    # XXX flutter sdk的安装路径

export PUB_HOSTED_URL=https://pub.flutter-io.cn

export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

 

$ flutter doctor   # 更新flutter