buildscript { repositories { google() maven{url'http://maven.aliyun.com/nexus/content/groups/public/'} } dependencies { classpath 'com.android.tools.build:gradle:3.4.2' } } allprojects { repositories { google() maven{url'http://maven.aliyun.com/nexus/content/groups/public/'} } } rootProject.buildDir = '../build' subprojects { project.buildDir = "${rootProject.buildDir}/${project.name}" } subprojects { project.evaluationDependsOn(':app') } task clean(type: Delete) { delete rootProject.buildDir }