运行时会卡在Running Gradle task 'assembleDebug', 因为Gradle的Maven仓库在国外, 可以使用阿里云的镜像地址。

修改项目下 build.gradle 和 flutter 安装目录flutter/packages/flutter_tools/gradle/flutter.gradle 两个文件中 buildscript 和allprojects

google()
jcenter()
//将以上代码替换为以下代码
maven { url 'https://maven.aliyun.com/repository/google' }//google
maven { url 'https://maven.aliyun.com/repository/central' }//central
maven { url 'https://maven.aliyun.com/repository/public' }//jcenter//public
maven { url 'https://maven.aliyun.com/repository/gradle-plugin'}//gradle-plugin