https://blog.csdn.net/lang523493505/article/details/82914253
https://blog.csdn.net/qq_23599965/article/details/80910202
// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { repositories { google() jcenter() maven{ url 'http://maven.aliyun.com/nexus/content/groups/public/'} } dependencies { classpath 'com.android.tools.build:gradle:3.2.1' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } allprojects { repositories { jcenter() maven{ url 'http://maven.aliyun.com/nexus/content/groups/public/'} maven { url "https://jitpack.io" } google() } } task clean(type: Delete) { delete rootProject.buildDir }