gradle7.0之后，android庫發布至MavenCentral流程變化。

最近更新到android studio 2020.3.1之后，發現變化挺大的，默認gradle都變成了7.0.2，我直接升級到最近版gradle7.1，突然發現之前6.9來創建maven庫的方法沒法用了，jitpack.io也不能在線編譯了，提交maven中央倉庫變化也很大，提交最新的私服nexus3上面，變化還是較小的，

gradle7.0之前的方法，請參考這位大佬，↓

Android庫發布至MavenCentral流程詳解

在這兒我主要寫變化后的gradle怎么配置，我也研究折騰了好久才搞定的，

直接上代碼，

1. gradle檔案配置（?C:\Users\用戶名.gradle\gradle.properties）

# MavenCentral
signing.keyId=后6位
signing.password=密碼
signing.secretKeyRingFile=../gradles/私鑰.gpg
ossrhUsername=賬號
ossrhPassword=密碼

2.在工程根目錄創建了gradles檔案夾

我把私鑰和 publish-maven.gradle 放入這個目錄的
然后在根目錄 .gitignore 添加忽略 /gradles/ （一定要忽略別把私鑰上傳到git上面了，）

3.在library工程中，最后一行加入參考

apply from: "${getRootDir().absolutePath}/gradles/publish-maven.gradle"

4.publish-maven.gradle檔案內容（直接復制稍微改一下就OK）

apply plugin: 'maven-publish'
apply plugin: 'signing'

def GROUP_ID = 'com.kotlinx'
def ARTIFACT_ID = 'yhttp'
def VERSION_NAME = '1.0.8'
def DESCRIPTION = '這兒是說明'
def GIT_LOCATION = 'github.com/yutils/yhttp'
def GIT_LOCATION_URL = 'https://'+GIT_LOCATION

//倉庫地址
def MAVEN_URL = "https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/"
def nexusUsername = '賬號'
def nexusPassword = '密碼'

task sourceJar(type: Jar) {
    if (hasAndroidPlugin()) {
        println "======> Android"
        from android.sourceSets.main.java.srcDirs
        //noinspection GroovyAccessibility
        archiveClassifier = 'sources'
    } else if (hasJavaPlugin()) {
        println "======> Java"
        from sourceSets.main.allSource
        //noinspection GroovyAccessibility
        archiveClassifier = 'sources'
    }
}

afterEvaluate { project ->
    tasks.all { Task task ->
        if (task.name.equalsIgnoreCase('publishAarPomPublishPublicationToSnapshotsRepository')) {
            task.dependsOn tasks.getByName('assemble')
        }
    }
}

def hasJavaPlugin() {
    if (plugins.hasPlugin("java-library")) {
        return true
    }
    return false
}

def hasAndroidPlugin() {
    if (plugins.hasPlugin("com.android.library")) {
        return true
    }
    return false
}

publishing {
    println "======> ${project.name}"
    println "====> the aar path is " + "$buildDir/outputs/aar/${project.name}-release.aar"
    println "====>" + MAVEN_URL
    println "====>" + VERSION_NAME
    publications {
        aarPomPublish(MavenPublication) {
            groupId GROUP_ID
            artifactId ARTIFACT_ID
            version VERSION_NAME
            artifact(sourceJar)
            artifact("$buildDir/outputs/aar/${project.name}-release.aar")
            pom {
                packaging 'aar'
                name = ARTIFACT_ID
                description = DESCRIPTION
                url = GIT_LOCATION_URL
                licenses {
                    license {
                        name = 'The Apache License, Version 2.0'
                        url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
                    }
                }
                developers {
                    developer {
                        id = 'yujing'
                        name = 'yujing'
                        email = '85161441@qq.com'
                    }
                }
                scm {
                    connection = 'scm:git:'+GIT_LOCATION+'.git'
                    developerConnection = 'scm:git:ssh://'+GIT_LOCATION+'.git'
                    url = GIT_LOCATION_URL
                }
            }
            pom.withXml {
                //asNode().appendNode('測驗').appendNode('自定義key', '自定義value')
                def dependenciesNode = asNode().appendNode('dependencies')
                configurations.implementation.allDependencies.each {
                    if (it.version != "unspecified") { // 過濾專案內library參考
                        println "=====>" + it.properties
                        println "=====>" + it.group + "  " + it.name + it.version
                        if (it.group == null || it.name == null || it.version == null) return
                        if (it.group == group) return
                        def dependencyNode = dependenciesNode.appendNode('dependency')
                        dependencyNode.appendNode('groupId', it.group)
                        dependencyNode.appendNode('artifactId', it.name)
                        dependencyNode.appendNode('version', it.version)

                        if (it.excludeRules.size() > 0) {
                            def exclusionsNode = dependencyNode.appendNode('exclusions')
                            it.excludeRules.each { rule ->
                                def exclusionNode = exclusionsNode.appendNode('exclusion')
                                exclusionNode.appendNode('groupId', rule.group)
                                exclusionNode.appendNode('artifactId', rule.module)
                            }
                        }
                    }
                }
            }
        }
    }

    repositories {
        maven {
            name "snapshots"
            url MAVEN_URL
            credentials {
                username = nexusUsername
                password = nexusPassword
            }
        }
    }
}

// signing 必須在 publishing 配置之后
signing {
    sign publishing.publications.aarPomPublish
}

5.發布

雙擊直接到maven庫，后續就不贅述了，

如果你的android studio 沒有這個gradle Tasks 選項

1.取消這個勾勾，
2.再同步一下就出來了，

這是我的github地址
https://github.com/yutils

這是安卓官方說明
https://developer.android.com/studio/build/maven-publish-plugin
這是gradle官方說明
https://docs.gradle.org/current/userguide/publishing_maven.html

研究不易，希望大家給我點個關注之類的