setting.gradle 文件修改如下：

pluginManagement {
    repositories {
        maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }
        maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter' }
        maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }
        maven { url 'https://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }
        maven { url 'https://developer.huawei.com/repo/' }
        maven { url "https://jitpack.io" }
        google()
        mavenCentral()
        gradlePluginPortal()
    }
}
dependencyResolutionManagement {
    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }
        maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter' }
        maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }
        maven { url 'https://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }
        maven { url 'https://developer.huawei.com/repo/' }
        maven { url "https://jitpack.io" }
        google()
        mavenCentral()
    }
}

rootProject.name = "My Application"
include ':app'

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gradle-wrapper.properties文件修改如下：

https://services.gradle.org/distributions/改成https://mirrors.cloud.tencent.com/gradle/

设置代理settings->System Settings->HTTP Proxy

注意：如果出现连接错误，就把代理删掉，镜像一般就可以解决了

IQUE.png

国内常用的代理服务器（注意：只需要域名即可）
1、东软信息学院

http://mirrors.neusoft.edu.cn 端口：80

2、北京化工大学

http://ubuntu.buct.edu.cn/ 端口：80
http://ubuntu.buct.cn/ 端口：80
http://ubuntu.buct6.edu.cn/ 端口：80

3、中国科学院开源协会

http://mirrors.opencas.cn 端口：80
http://mirrors.opencas.org 端口：80
http://mirrors.opencas.ac.cn 端口：80

4、上海GDG镜像服务器

http://sdk.gdgshanghai.com 端口：8000

5、电子科技大学

http://mirrors.dormforce.net 端口：80

6、腾讯 Bugly 镜像

http://android-mirror.bugly.qq.com 端口：8080