1、flutter环境配置
fluttersdk放置路径不要有大写字母文件夹
2、环境变量配置：
//fultter
FlUTTER_PATH：D:\******\flutter
FLUTTER_STORAGE_BASE_URL：https://storage.flutter-io.cn
PUB_HOSTED_URL：https://pub.flutter-io.cn
//安卓SDK
ANDROID_HOME:D:\******\SDK
//java&安卓开发要配置这个
JAVA_HOME:C:\******\Java\jdk1.8.0_172
CLASSPATH：%JAVA_HOME%\lib\rt.jar;%JAVA_HOME%\lib\tools.jar
//java&安卓&&fultter&git【ps:用;隔开】
Path:
%JAVA_HOME%\bin;
%JAVA_HOME%\jre\bin;
%ANDROID_HOME%\platform-tools;
d:\*******\Git\cmd;
D:\*******\TortoiseGit\bin;
D:\*******\flutter\bin;
