Caused by: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveE

Android studio3.6.1导入项目经常遇到：

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

解决方案，在project的build.gradle 添加红色如下：

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/'}
        jcenter()
        
    }
    dependencies {
        classpath 'com.google.gms:google-services:4.0.1'
        classpath 'com.android.tools.build:gradle:3.2.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

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

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