Android 项目中常常需要引用各种架包，但是这些架包都在远程仓库中，国内使用Maven速度太慢了可以使用阿里云镜像仓库

• 在项目Project下的 build.gradle文件中 maven配置阿里云镜像仓库的url（http://maven.aliyun.com/nexus/content/groups/public）,然后同步一下。

buildscript {
   repositories {
       //   此处为原先的配置  
      // maven { url "https://maven.google.com" }
     
      // 改为阿里云的镜像地址
      maven{url 'https://maven.aliyun.com/repository/google'}
       maven{url 'https://maven.aliyun.com/repository/jcenter'}
       maven{url 'https://maven.aliyun.com/nexus/content/groups/public'}
      // jcenter()
      // google()
   }
   dependencies {
       classpath 'com.android.tools.build:gradle:3.2.1'
       classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
       classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'

       // NOTE: Do not place your application dependencies here; they belong
       // in the individual module build.gradle files
   }
}

allprojects {
   repositories {
         // 改为阿里云的镜像地址
      maven{url 'https://maven.aliyun.com/repository/google'}
       maven{url 'https://maven.aliyun.com/repository/jcenter'}
       maven{url 'https://maven.aliyun.com/nexus/content/groups/public'}
       //   此处为原先的配置    
      // maven { url "https://maven.google.com" }
       //jcenter()
      // google()
   }
}

task clean(type: Delete) {
   delete rootProject.buildDir
}