参考链接

准备仓库:
登录私服地址-登录-设置-新建hosted仓库release_aar

1、在要发布的module的build.gradle中配置如下：

apply plugin: 'com.android.library'
apply plugin: 'maven'

uploadArchives {
    configuration = configurations.archives
    repositories {
        mavenDeployer {
            repository(url: "http://10.10.225.117:8081/repository/release_aar/") {
                authentication(userName: "admin" , password: "iray123" )
            }

            pom.project {
                version "1.0.0"
                artifactId "iray_picture"
                groupId "com.iray"
                packaging "aar"
                description "自定义picture模块"
            }
        }
    }
}

2、执行任务gradle-tasks-upload-uploadArchives

Q.E.D.