1、查看是不是把Gradle的离线模式给打开了（若打开了，请把离线模式关闭）
image.png
2、添加可访问到的仓库
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
google()
maven { url 'http://maven.aliyun.com/nexus/content/groups/public/'}
maven { url'https://maven.aliyun.com/repository/public/' }
maven { url'https://maven.aliyun.com/repository/google/' }
maven { url'https://maven.aliyun.com/repository/jcenter/' }
maven { url'https://maven.aliyun.com/repository/central/' }
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.2.0'
// 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/'}
maven { url'https://maven.aliyun.com/repository/public/' }
maven { url'https://maven.aliyun.com/repository/google/' }
maven { url'https://maven.aliyun.com/repository/jcenter/' }
maven { url'https://maven.aliyun.com/repository/central/' }
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
