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原文：使用Gradle发布项目到JCenter仓库

这篇文章介绍通过Gradle把开源项目发布到公共仓库JCenter中，方便你我他的事情，我们都是很懒的嘛。JCenter现在是Android Studio中repositories的默认节点了，之前是Maven的，不过JCenter是兼容Maven的，所以放心使用。步骤基本是按Publishing Gradle Android Library to jCenter Repository这里来的，英文能看的直接看这篇也行。下面我的步骤正式开始，发布到JCenter仓库的是我的项目：BounceProgressBar。

申请Bintray账号

Bintray的基本功能类似于Maven Central，一样的我们需要一个账号，Bintray传送门，注册完成后第一步算完成了。

生成项目的JavaDoc和source JARs

简单的说生成的这两样东西就是我们在下一步中上传到远程仓库JCenter上的文件了。这一步需要android-maven-plugin插件，所以我们需要在项目的build.gradle（Top-level build file，项目最外层的build.gradle文件）中添加这个构建依赖，如下：

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          `buildscript {`
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          `    ``repositories {`
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          `        ``jcenter()`
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          `    ``}`
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          `    ``dependencies {`
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          `        ``classpath ``'com.android.tools.build:gradle:1.0.0'`
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          `        ``classpath ``'com.github.dcendents:android-maven-plugin:1.2'`
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          `        ``// NOTE: Do not place your application dependencies here; they belong`
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          `        ``// in the individual module build.gradle files`
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          `    ``}`
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          `}`
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          `allprojects {`
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          `    ``repositories {`
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          `        ``jcenter()`
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          `    ``}`
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          `}`
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然后在你需要发布的那个module（我这里的即是library）的build.gradle里配置如下内容：

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        <div class="line number1 index0 alt2">
          `apply plugin: ``'com.android.library'`
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        <div class="line number2 index1 alt1">
          `apply plugin: ``'com.github.dcendents.android-maven'`
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        <div class="line number3 index2 alt2">
          `apply plugin: ``'com.jfrog.bintray'`
        </div>
        
        <div class="line number4 index3 alt1">
          `// This is the library version used when deploying the artifact`
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        <div class="line number5 index4 alt2">
          `version = ``"1.0.0"`
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        <div class="line number6 index5 alt1">
          `android {`
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        <div class="line number7 index6 alt2">
          `    ``compileSdkVersion 21`
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        <div class="line number8 index7 alt1">
          `    ``buildToolsVersion ``"21.1.2"`
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          `    ``resourcePrefix ``"bounceprogressbar__"`    `//这个随便填`
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          `    ``defaultConfig {`
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          `        ``minSdkVersion 9`
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        <div class="line number12 index11 alt1">
          `        ``targetSdkVersion 21`
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        <div class="line number13 index12 alt2">
          `        ``versionCode 1`
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        <div class="line number14 index13 alt1">
          `        ``versionName version`
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        <div class="line number15 index14 alt2">
          `    ``}`
        </div>
        
        <div class="line number16 index15 alt1">
          `    ``buildTypes {`
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        <div class="line number17 index16 alt2">
          `        ``release {`
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        <div class="line number18 index17 alt1">
          `            ``minifyEnabled ``false`
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        <div class="line number19 index18 alt2">
          `            ``proguardFiles getDefaultProguardFile(``'proguard-android.txt'``), ``'proguard-rules.pro'`
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          `        ``}`
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        <div class="line number21 index20 alt2">
          `    ``}`
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        <div class="line number22 index21 alt1">
          `}`
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        <div class="line number23 index22 alt2">
          `dependencies {`
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        <div class="line number24 index23 alt1">
          `    ``compile fileTree(dir: ``'libs'``, include: [``'*.jar'``])`
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        <div class="line number25 index24 alt2">
          `    ``compile ``'com.nineoldandroids:library:2.4.0+'`
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        <div class="line number26 index25 alt1">
          `}`
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        <div class="line number27 index26 alt2">
          `def siteUrl = ``'&lt;a href="https://github.com/zhengxiaopeng/BounceProgressBar">https://github.com/zhengxiaopeng/BounceProgressBar&lt;/a>'` `// 项目的主页`
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          `def gitUrl = ``'&lt;a href="https://github.com/zhengxiaopeng/BounceProgressBar.git">https://github.com/zhengxiaopeng/BounceProgressBar.git&lt;/a>'` `// Git仓库的url`
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          `group = ``"org.rocko.bpb"` `// Maven Group ID for the artifact，一般填你唯一的包名`
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        <div class="line number30 index29 alt1">
          `install {`
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          `    ``repositories.mavenInstaller {`
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        <div class="line number32 index31 alt1">
          `        ``// This generates POM.xml with proper parameters`
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        <div class="line number33 index32 alt2">
          `        ``pom {`
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        <div class="line number34 index33 alt1">
          `        ``project {`
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        <div class="line number35 index34 alt2">
          `        ``packaging ``'aar'`
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        <div class="line number36 index35 alt1">
          `        ``// Add your description here`
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          `        ``name ``'Android BounceProgressBar Widget'` `//项目描述`
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        <div class="line number38 index37 alt1">
          `        ``url siteUrl`
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        <div class="line number39 index38 alt2">
          `        ``// Set your license`
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        <div class="line number40 index39 alt1">
          `        ``licenses {`
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        <div class="line number41 index40 alt2">
          `            ``license {`
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        <div class="line number42 index41 alt1">
          `            ``name ``'The Apache Software License, Version 2.0'`
        </div>
        
        <div class="line number43 index42 alt2">
          `            ``url ``'&lt;a href="http://www.apache.org/licenses/LICENSE-2.0.txt">http://www.apache.org/licenses/LICENSE-2.0.txt&lt;/a>'`
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        <div class="line number44 index43 alt1">
          `            ``}`
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        <div class="line number45 index44 alt2">
          `        ``}`
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        <div class="line number46 index45 alt1">
          `        ``developers {`
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        <div class="line number47 index46 alt2">
          `        ``developer {`
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        <div class="line number48 index47 alt1">
          `        ``id ``'zhengxiaopeng'`    `//填写的一些基本信息`
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        <div class="line number49 index48 alt2">
          `        ``name ``'Rocko'`
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        <div class="line number50 index49 alt1">
          `        ``email ``'zhengxiaopeng.china@gmail.com'`
        </div>
        
        <div class="line number51 index50 alt2">
          `        ``}`
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        <div class="line number52 index51 alt1">
          `        ``}`
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        <div class="line number53 index52 alt2">
          `        ``scm {`
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        <div class="line number54 index53 alt1">
          `        ``connection gitUrl`
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        <div class="line number55 index54 alt2">
          `        ``developerConnection gitUrl`
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        <div class="line number56 index55 alt1">
          `        ``url siteUrl`
        </div>
        
        <div class="line number57 index56 alt2">
          `        ``}`
        </div>
        
        <div class="line number58 index57 alt1">
          `        ``}`
        </div>
        
        <div class="line number59 index58 alt2">
          `        ``}`
        </div>
        
        <div class="line number60 index59 alt1">
          `    ``}`
        </div>
        
        <div class="line number61 index60 alt2">
          `}`
        </div>
        
        <div class="line number62 index61 alt1">
          `task sourcesJar(type: Jar) {`
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        <div class="line number63 index62 alt2">
          `    ``from android.sourceSets.main.java.srcDirs`
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        <div class="line number64 index63 alt1">
          `    ``classifier = ``'sources'`
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        <div class="line number65 index64 alt2">
          `}`
        </div>
        
        <div class="line number66 index65 alt1">
          `task javadoc(type: Javadoc) {`
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        <div class="line number67 index66 alt2">
          `    ``source = android.sourceSets.main.java.srcDirs`
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        <div class="line number68 index67 alt1">
          `    ``classpath += project.files(android.getBootClasspath().join(File.pathSeparator))`
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        <div class="line number69 index68 alt2">
          `}`
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        <div class="line number70 index69 alt1">
          `task javadocJar(type: Jar, dependsOn: javadoc) {`
        </div>
        
        <div class="line number71 index70 alt2">
          `    ``classifier = ``'javadoc'`
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        <div class="line number72 index71 alt1">
          `    ``from javadoc.destinationDir`
        </div>
        
        <div class="line number73 index72 alt2">
          `}`
        </div>
        
        <div class="line number74 index73 alt1">
          `artifacts {`
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        <div class="line number75 index74 alt2">
          `    ``archives javadocJar`
        </div>
        
        <div class="line number76 index75 alt1">
          `    ``archives sourcesJar`
        </div>
        
        <div class="line number77 index76 alt2">
          `}`
        </div>
        
        <div class="line number78 index77 alt1">
          `Properties properties = ``new` `Properties()`
        </div>
        
        <div class="line number79 index78 alt2">
          `properties.load(project.rootProject.file(``'local.properties'``).newDataInputStream())`
        </div>
        
        <div class="line number80 index79 alt1">
          `bintray {`
        </div>
        
        <div class="line number81 index80 alt2">
          `    ``user = properties.getProperty(``"bintray.user"``)`
        </div>
        
        <div class="line number82 index81 alt1">
          `    ``key = properties.getProperty(``"bintray.apikey"``)`
        </div>
        
        <div class="line number83 index82 alt2">
          `    ``configurations = [``'archives'``]`
        </div>
        
        <div class="line number84 index83 alt1">
          `    ``pkg {`
        </div>
        
        <div class="line number85 index84 alt2">
          `        ``repo = ``"maven"`
        </div>
        
        <div class="line number86 index85 alt1">
          `        ``name = ``"BounceProgressBar"`    `//发布到JCenter上的项目名字`
        </div>
        
        <div class="line number87 index86 alt2">
          `        ``websiteUrl = siteUrl`
        </div>
        
        <div class="line number88 index87 alt1">
          `        ``vcsUrl = gitUrl`
        </div>
        
        <div class="line number89 index88 alt2">
          `        ``licenses = [``"Apache-2.0"``]`
        </div>
        
        <div class="line number90 index89 alt1">
          `        ``publish = ``true`
        </div>
        
        <div class="line number91 index90 alt2">
          `    ``}`
        </div>
        
        <div class="line number92 index91 alt1">
          `}`
        </div>
      </div>
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配置好上述后需要在你的项目的根目录上的local.properties文件里（一般这文件需gitignore，防止泄露账户信息）配置你的bintray账号信息，_your_user_name_为你的用户名，_your_apikey_为你的账户的apikey，可以点击进入你的账户信息里再点击Edit即有查看API Key的选项，把他复制下来。

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          `bintray.user=your_user_name`
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          `bintray.apikey=your_apikey`
        </div>
      </div>
    </td>
  </tr>
</table>

Rebuild一下项目，顺利的话，就可以在module里的build文件夹里生成相关文件了。这一步为止，就可以把你项目生成到本地的仓库中了，Android Studio中默认即在Android\sdk\extras\android\m2repository这里，所以我们可以通过如下命令(Windows中，可能还需要下载一遍Gradle，之后就不需要了)执行生成:

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          `gradlew install`
        </div>
      </div>
    </td>
  </tr>
</table>

上传到Bintray

上传到Bintray需要gradle-bintray-plugin的支持，所以在最外层的build.gradle里添加构建依赖：

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          `buildscript {`
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          `    ``repositories {`
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          `        ``jcenter()`
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          `    ``}`
        </div>
        
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          `    ``dependencies {`
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          `        ``classpath ``'com.android.tools.build:gradle:1.0.0'`
        </div>
        
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          `        ``classpath ``'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'`
        </div>
        
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          `        ``classpath ``'com.github.dcendents:android-maven-plugin:1.2'`
        </div>
        
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          `        ``// NOTE: Do not place your application dependencies here; they belong`
        </div>
        
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          `        ``// in the individual module build.gradle files`
        </div>
        
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          `    ``}`
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          `}`
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          `allprojects {`
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          `    ``repositories {`
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          `        ``jcenter()`
        </div>
        
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          `    ``}`
        </div>
        
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          `}`
        </div>
      </div>
    </td>
  </tr>
</table>

Rebuild一下，然后执行如下命令(Windows中)完成上传：

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          `gradlew bintrayUpload`
        </div>
      </div>
    </td>
  </tr>
</table>

上传完成即可在Bintray网站上找到你的Repo，我们需要完成最后一步工作，申请你的Repo添加到JCenter。可以进入这个页面,输入你的项目名字点击匹配到的项目，然后写一写Comments再send即可，然后就等管理员批准了，我是大概等了40分钟，然后网站上会给你一条通过信息，然后就OK了，大功告成。

成功后就可以在其它项目里方便的使用你发布的项目了：

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          `dependencies {`
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          `    ``compile ``'org.rocko.bpb:library:1.0.0'`
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          `}`
        </div>
      </div>
    </td>
  </tr>
</table>

End

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