解决AndroidStudio编译时报错：Could not resolve all artifacts for configuration ':classpath'；

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升级完AndroidStudio3.6.1编译项目报错：

Caused by: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all artifacts for configuration ‘:classpath’.

提示错误：Read Time out

即使开了梯子依然下载超时，我们更换为阿里云的maven库，下载速度会更快一点。

将原来配置：

repositories {
        google()
        jcenter()  
    }

repositories {
        google()      
        jcenter()
        
    }

改为：

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

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

等待一小会Gradle sync成功