android studio syncing 慢 gradle

找到如图位置

原有代码删除

添加新代码，版本号记得修改

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

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

    }
    dependencies {
     
        classpath 'com.android.tools.build:gradle:3.4.1'

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

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

    }
}

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

亲测好用
代码原博客