环境搭建（参考网站：https://flutterchina.club）
1、下载Flutter SDK：https://flutter.dev/docs/development/tools/sdk/releases?tab=macos#macos
进入网站clone：https://github.com/flutter/flutter (有点慢，需要等待)
2、设置全局path
打开终端：vim ~/.bash_profile
设置path：
export PUB_HOSTED_URL=https://pub.flutter-io.cn #国内用户需要设置
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn #国内用户需要设置
export PATH=PATH_TO_FLUTTER_GIT_DIRECTORY/flutter/bin:$PATH
注意：PATH_TO_FLUTTER_GIT_DIRECTORY 为你flutter的路径，比如“~/document/code”
export PATH=~/document/code/flutter/bin:$PATH
重启终端，查看path：echo $PATH
3、检查Flutter运行环境依赖安装
终端输入：flutter doctor
出现如下错误：
image.png
解决办法：下载Android SDK（推荐通过安装Android Studio工具进行SDK下载）；
继续根据错误信息解决即可，最后如下图即可；
image.png
附录：
下载Android SDK：https://blog.csdn.net/qq_37443229/article/details/87627385
下载JDK：https://www.jianshu.com/p/e59f232bbd99
手动设置Android SDK的环境变量：
export ANDROID_HOME=/Users/gametest/Library/Android/sdk
export PATH=${PATH}:${ANDROID_HOME}/platform-tools
export PATH=${PATH}:${ANDROID_HOME}/tools
export PATH=${PATH}:${ANDROID_HOME}/build-tools/29.0.2
