Gradle 配置阿里云仓库

解决Gradle依赖同步慢的问题，仅供参考，我不这么用。

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

buildscript({
    repositories {
        //首先去阿里云的仓库去找
        maven{
            url{'http://maven.aliyun.com/nexus/content/groups/public/'}
        }
        //如果找不到，就去Google仓库去找
        google()
        //再找不到，就去jcenter仓库去找
        jcenter()

    }
    dependencies {
        classpath 'command.android.tools.build:gradle:3.5.0'

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

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

    })
})

task clean(type: Delete) {
    println('-------' + rootProject.buildDir)
//    delete rootProject.buildDir
}