Gradle介绍
安装：直接看官网上面的说明 https://gradle.org/install/ 就好，Mac上面brew install gradle
环境变量配置：
- windows： https://blog.csdn.net/xudaliang_/article/details/79213891
- Mac：https://www.jianshu.com/p/e9d035f30876
添加 Gradle 依赖 https://blog.csdn.net/zxs9999/article/details/81484799
Re-download dependencies and sync project (requires network)
https://www.jianshu.com/p/8b76e3b52f5f
找到“Build,Execution,Deployment”下的“gradle”，选中“Use default gradle wrapper(recommended)”