过程比较简单，记录一下发布的流程，方便后续查阅

1.注册登录就不多说了JCenter地址
2.新建一个项目GradlePro，同时新建一个module

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.2'
        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'

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

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

4.编辑Module(对应此项目中的exlibrary)中的build.gralde文件

apply plugin: 'com.android.library'
apply plugin: 'com.github.dcendents.android-maven'
apply plugin: 'com.jfrog.bintray'

//版本号
version = "1.0.0"

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.0"
    //资源前缀
    resourcePrefix "exlibrary__"

    defaultConfig {
        minSdkVersion 14
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    android {
        lintOptions {
            abortOnError false
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    testCompile 'junit:junit:4.12'
}

//项目的主页
def siteUrl = 'https://github.com/byhook/GradlePro'
//Git仓库主页
def gitUrl = 'https://github.com/byhook/GradlePro.git'
//Maven Group ID
group = "cn.byhook.exlibrary"
install {
    repositories.mavenInstaller {
        pom {
            project {
                packaging 'aar'
                //项目描述
                name 'Android ExLibrary'
                url siteUrl
                //设置授权信息
                licenses {
                    license {
                        name 'The Apache Software License, Version 2.0'
                        url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
                    }
                }
                //填写的一些基本信息
                developers {
                    developer {
                        id 'byhook'
                        name 'Andy'
                        email 'byhook@163.com'
                    }
                }
                scm {
                    connection gitUrl
                    developerConnection gitUrl
                    url siteUrl
                }
            }
        }
    }
}
task sourcesJar(type: Jar) {
    from android.sourceSets.main.java.srcDirs
    classifier = 'sources'
}

task javadoc(type: Javadoc) {
    source = android.sourceSets.main.java.srcDirs
    classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
}

task javadocJar(type: Jar, dependsOn: javadoc) {
    classifier = 'javadoc'
    from javadoc.destinationDir
}

artifacts {
    archives javadocJar
    archives sourcesJar
}

Properties properties = new Properties()
properties.load(project.rootProject.file('local.properties').newDataInputStream())
bintray {
    user = properties.getProperty("bintray.user")
    key = properties.getProperty("bintray.apikey")
    configurations = ['archives']
    pkg {
        repo = "maven"
        //发布到JCenter上的项目名称
        name = "ExLibrary"
        websiteUrl = siteUrl
        vcsUrl = gitUrl
        licenses = ["Apache-2.0"]
        publish = true
    }
}

5.编辑local.properties新增配置

bintray.user=your_username
bintray.apikey=your_apikey

6.上传到Bintray需要gradle-bintray-plugin的支持，在项目根目录的build.gradle中新增依赖

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.2'
        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.7.3'
        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'

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

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

7.在项目根目录执行命令

gradle clean
gradle build --info

即可生成所需要的文件

8.开始发布项目，先登录JCenter，拷贝你自己的ApiKey，写进刚才的配置文件local.properties中去

在根目录输入命令开始上传

gradle bintrayUpload

9.进入JCenter后台配置

点击进入，可以看到我们发布的项目啦

10.进入详情，点击添加到JCenter中去

填写号相应的Comments信息，点击Send然后就等待审核完成了

小结：
1.Windows下的命令貌似是gradlew开头的
2.之前在根目录下配置build.gradle，

使用这个没有通过
classpath 'com.github.dcendents:android-maven-plugin:1.2'
改成这个就好了
classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.7.3'

参考：
https://www.virag.si/2015/01/publishing-gradle-android-library-to-jcenter/http://www.jcodecraeer.com/a/anzhuokaifa/Android_Studio/2015/0227/2502.html