1.首先將Android Studio的Settings開啟，然後搜尋Android Studio將Enable embedded Maven repository選項勾選，你也可以通過單擊Build Execution Deployment中的Gradle來找到Android Studio選項

[點選並拖拽以移動] ​

2.修改build.gradle檔案 如下，其中的註解為核心修改部分

buildscript {
    repositories {
       //將jcenter()註釋掉,加入先面maven{url'....'}
       // jcenter()
 

        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/'}
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
        classpath 'com.mob.sdk:MobSDK:+'

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

    }
}

allprojects {
    repositories {
     //將jcenter()註釋掉,加入先面maven{url'....'} 還有加入下面的maven { url "https://jitpack.io" }
     //   jcenter()
        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/'}
        maven { url "https://jitpack.io" }

    }
    tasks.withType(Javadoc) {
        options {
 

            encoding "UTF-8"
            charSet 'UTF-8'
            links "http://docs.oracle.com/javase/7/docs/api"
        }
    }
}

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

3、如果build.gradle中google()報某某錯誤的話，可以使用如下程式碼替換

maven {url 'https://maven.google.com'}