参考：
https://blog.csdn.net/lkl22/article/details/122905477
https://central.sonatype.org/publish/publish-gradle/#performing-a-release-deployment
https://juejin.cn/post/6953598441817636900
https://cloud.tencent.com/developer/article/1188461
https://docs.gradle.org/current/userguide/publishing_maven.html
https://developer.android.google.cn/studio/build/maven-publish-plugin?hl=en#groovy
https://juejin.cn/post/6963633839860088846

官网：
https://issues.sonatype.org/
https://s01.oss.sonatype.org/

成功后查询：
https://search.maven.org/
https://repo1.maven.org/maven2/

0. gradle

基于 gradle 版本 7.2

插件的变化参考：
https://docs.gradle.org/current/userguide/publishing_maven.html#publishing_maven

1. 7.0 之后的 gradle 在项目级 build.gradle 内 删除了 allprojects 配置，自定义 maven 需要到 项目级的 settings.gradle 的 dependencyResolutionManagement -> repositories 内添加，示例：

dependencyResolutionManagement {
    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        google()
        mavenCentral()
        maven { allowInsecureProtocol = true
            url 'http://127.0.0.1:8081/repository/maven-releases/' }
    }
}

1. 备案

https://issues.sonatype.org/projects/OSSRH/summary
在网站内新建问题，新建的问题会填写 url/groupID 等信息
然后会有回复，然后在新建问题内的 host ，备案写入 dns txt
写入成功后，等待审核就好了。
示例：

username -> zhangsan 
password -> 123456

审核成功了，账号就能登陆到 nexus 官网了

2. gpg 生成密钥

https://central.sonatype.org/publish/requirements/gpg/

1. "gpg --gen-key" 命令生成密钥，会填入对应用户名、邮箱、密钥(示例：111111)
2. 将公钥上传到服务器

gpg --keyserver keyserver.ubuntu.com --send-keys CFFCEFB88FC0B9AF6D4AA9195B325FB0C6A4EBE9
gpg --keyserver keys.openpgp.org --send-keys CFFCEFB88FC0B9AF6D4AA9195B325FB0C6A4EBE9
gpg --keyserver pgp.mit.edu --send-keys CFFCEFB88FC0B9AF6D4AA9195B325FB0C6A4EBE9

3. 将密钥导出到本地文件夹

gpg --output native.gpg --export-secret-keys C6A4EBE9

3. AndroidStudio 项目内 gradle 配置

1. gradle.properties

在这里配置本地 gpg 文件信息，ossrh 账户信息

signing.keyId=C6A4EBE9
signing.password=111111
signing.secretKeyRingFile= D:\\本地路径\\native.gpg
ossrhUsername=zhangsan
ossrhPassword=123456

2. 模块级 build.gradle

plugins {
    id 'com.android.library'
    id 'maven-publish'
    id 'signing'
}

android {
    compileSdk 32

    defaultConfig {
        minSdk 21
        targetSdk 32

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        consumerProguardFiles "consumer-rules.pro"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

project.afterEvaluate {
    publishing {
        repositories {
            maven {
                name 'test'
                url 'http://127.0.0.1:8081/repository/maven-releases/'
                credentials {
                    username = 'admin'
                    password = '123456'
                }
            }
            maven {
                name 'maven'
                url 'https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/'
                credentials {
                    username = 'zhangsan'
                    password = '123456'

                }
            }
        }
        publications {
            maven(MavenPublication) {
                groupId = 'com.baidu.module'
                artifactId = "chat"
                version = "1.0"

                artifact bundleReleaseAar
                //artifact sourcesJar
                //artifact generateSourcesJar
                //artifact javadocJar
                //from components.release
                artifacts {}

                pom {
                    name = 'My Library'
                    description = 'A concise description of my library'
                    url = 'http://www.baidu.com/library'
                    inceptionYear = '2023'

                    licenses {
                        license {
                            name = 'The Apache License, Version 2.0'
                            url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
                        }
                    }
                    developers {
                        developer {
                            id = 'baidu'
                            name = 'zhangsan'
                            email = 'zhangsan@baidu.ccom'
                        }
                    }
                    scm {
                        connection = 'scm:git:git://baidu.com/my-library.git'
                        developerConnection = 'scm:git:ssh://baidu.com/my-library.git'
                        url = 'http://baidu.com/my-library/'
                    }
                }
            }
        }
    }
}

signing {
    sign publishing.publications
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.3.0'
    implementation 'com.google.android.material:material:1.4.0'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}

账号等信息都填写正确，然后点击右侧 publishMavenPublicationToMavenRepository 发布

4. 最终发布

登录 nuxus 后，在 Staging Repositories 选中项目，然后点 close ，close 没问题的话，最后点 release 就发布了。

5. 本地 nexus 仓库

nexus 安装：
https://www.sonatype.com/products/repository-oss-download

启动命令

.\nexus.exe /install
.\nexus.exe /start
.\nexus.exe /run
.\nexus.exe /uninstall
.\nexus.exe /stop

本地访问 http://127.0.0.1:8081/#browse/browse
账号和密码在安装时可见，admin、admin.password

问题总结

1. 网上大部分 gradle 7.0 之前的版本示例代码，7.0 后做了一点改变，按上面示例就行
2. sonatype 内建立项目是通过提出问题，然后审核 才通过的