Android Studio 更改国内代理（阿里云）

as版本：3.5.2
学习Android开发，创建第一个项目的时候报错：

ERROR: Unable to resolve dependency for ‘:app@debugAndroidTest/compileClasspath’: Could not download junit.jar (junit:junit:4.12)
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Affected Modules: app

ERROR: Unable to resolve dependency for ‘:app@debugUnitTest/compileClasspath’: Could not download junit.jar (junit:junit:4.12)
Show Details
Affected Modules: app

解决方式如下：

1 把项目的build.gradle文件更改如下：

buildscript {
    repositories {
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
        maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter' }

        // jcenter()
        google()

    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.2'

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

allprojects {
    repositories {

        // 添加阿里云 maven 地址
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
        maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter' }

        // jcenter()
        google()
    }
}


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

2 在File-Settings中修改代理

3

4 点击sync

5 如果出现证书错误，可以参考这篇文章下载阿里云证书
https://blog.csdn.net/weixin_45607439/article/details/100672602
之后项目不再报错。

参考文章：https://blog.csdn.net/jiangbw415/article/details/81675346?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task
https://blog.csdn.net/weixin_40849588/article/details/86559842?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task
https://blog.csdn.net/u013806583/article/details/92846180

直接注释掉build.gradle中的junit依赖，也可以不报错，但是不推荐