國內下載Flutter

出現鏡像錯誤等現象屬於源碼包不全面，國內下載鏡像添加環境變量。

①：Linux執行如下操作

export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn
git clone -b dev https://github.com/flutter/flutter.git
export PATH="$PWD/flutter/bin:$PATH"
cd ./flutter
flutter doctor

②：Windows執行如下操作

添加環境變量

PUB_HOSTED_URL https://pub.flutter-io.cn
FLUTTER_STORAGE_BASE_URL https://storage.flutter-io.cn

在原來不完整的包下執行flutter doctor