build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        maven { url 'https://maven.aliyun.com/repository/google' }
        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/'}
        maven{ url'http://maven.aliyun.com/nexus/content/repositories/jcenter'}
//        maven {
//            name "aliyunCentral"
//            url "https://maven.aliyun.com/repository/central"
//        }
//        maven {
//            name "aliyunGoogle"
//            url "https://maven.aliyun.com/repository/google"
//        }
//        maven {
//            name "aliyunJCenter"
//            url "https://maven.aliyun.com/repository/jcenter"
//        }
    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.0.0"

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

allprojects {
    repositories {
        maven { url 'https://maven.aliyun.com/repository/google' }
        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/'}
        maven{ url'http://maven.aliyun.com/nexus/content/repositories/jcenter'}
//        maven {
//            name "aliyunCentral"
//            url "https://maven.aliyun.com/repository/central"
//        }
//        maven {
//            name "aliyunGoogle"
//            url "https://maven.aliyun.com/repository/google"
//        }
//        maven {
//            name "aliyunJCenter"
//            url "https://maven.aliyun.com/repository/jcenter"
//        }
    }
}

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