maven配置阿里云代理地址

buildscript {
    repositories {
        maven{ url 'http://maven.aliyun.com/nexus/content/groups/public'}
        google()
    }
    dependencies {
      ....
    }
}

allprojects {
    repositories {
        maven{ url 'http://maven.aliyun.com/nexus/content/groups/public'}
        maven{ url "https://jitpack.io"}
        google()
    }
}