build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
apply from: "config.gradle"

buildscript {
    repositories {
        google()
        // jcenter()
        // maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
        maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter/' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'

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

allprojects {
    repositories {
        google()
        // jcenter()
        // maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
        maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter/' }
    }
}

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