build.gradle

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

buildscript {
    
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.3'
        // 引用jcenter上传的库
        classpath 'com.novoda:bintray-release:0.9.2'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

//configurations.all {
//    //循环一个个的依赖库
//    resolutionStrategy.eachDependency { DependencyResolveDetails details ->
//        //获取当前循环到的依赖库
//        def requested = details.requested
//        //如果这个依赖库群组的名字是com.android.support
//        if (requested.group == 'com.android.support') {
//            //且其名字不是以multidex开头的
//            if (!requested.name.startsWith("appcompat-v7")) {
//                //这里指定需要统一的依赖版本
//                details.useVersion '28.0.0'
//            }
//        }
//    }
//}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

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