build.gradle

// 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:3.4.1'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

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

ext {
//  app 版本
    versionCode = 1
    versionName = "1.0.0"
//  编译版本
    compileSdkVersion = 28
    minSdkVersion = 21
    targetSdkVersion = 28

}

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