build gradle文件

buildscript {
    repositories {
        //jcenter()
        maven { url ‘http://maven.oschina.net/content/groups/public/‘ }
    }
    dependencies {
        classpath ‘com.android.tools.build:gradle:2.2.2‘

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

 或者

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath ‘com.android.tools.build:gradle:2.2.2‘
        classpath ‘com.github.dcendents:android-maven-gradle-plugin:1.5‘
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

Android studio下载依赖包很慢