task buildJar(dependsOn: ['compileReleaseJavaWithJavac'], type: Jar) {

     appendix = "sample"

     baseName = "demo"

     version = "1.0.0"

     classifier = "release"

 //后缀名

     extension = "jar"

 //最终的 Jar 包名，如果没设置，默认为 [baseName]-[appendix]-[version]-[classifier].[extension]

 //    archiveName = "AndroidDemo.jar"

 //需打包的资源所在的路径集

     def srcClassDir = [project.buildDir.absolutePath + "/intermediates/classes/release"];

 //初始化资源路径集

     from srcClassDir

     from (project.zipTree("libs/第三方库包.jar"))

     destinationDir = file("build/libs")

     //去除路径集下部分的资源     exclude "**/**/BuildConfig.class"

     exclude "**/**/BuildConfig\$*.class"

     exclude "**/R.class"

     exclude "**/R\$*.class"

     //只导入资源路径集下的部分资源

     include "**/*.class"

     include "第三方库的包名/**/*/class" }

 task buildJar(dependsOn: ['compileReleaseJavaWithJavac'], type: Jar) {

     appendix = "sample"

     baseName = "demo"

     version = "1.0.0"

     classifier = "release"

 //后缀名

     extension = "jar"

 //最终的 Jar 包名，如果没设置，默认为 [baseName]-[appendix]-[version]-[classifier].[extension]

 //    archiveName = "AndroidDemo.jar"

 //需打包的资源所在的路径集

     def srcClassDir = [project.buildDir.absolutePath + "/intermediates/classes/release"];

 //初始化资源路径集

     from srcClassDir

 //去除路径集下部分的资源

  exclude "**/**/BuildConfig.class"

  exclude "**/**/BuildConfig\$*.class"

  exclude "**/R.class"

  exclude "**/R\$*.class"

 //只导入资源路径集下的部分资源

     include "**/*.class"

 }

 task proguardJar(dependsOn: ['buildJar'], type: ProGuardTask) {

 //Android 默认的 proguard 文件

     configuration android.getDefaultProguardFile('proguard-android.txt')

 //manifest 注册的组件对应的 proguard 文件

     configuration project.buildDir.absolutePath + "/intermediates/proguard-rules/release/aapt_rules.txt"

     configuration 'proguard-rules.pro'

     String inJar = buildJar.archivePath.getAbsolutePath()

 //输入 jar

     injars inJar

 //输出 jar

     outjars inJar.substring(0, inJar.lastIndexOf('/')) + "/proguard-${buildJar.archiveName}"

 //设置不删除未引用的资源(类，方法等)

     dontshrink

     Plugin plugin = getPlugins().hasPlugin(AppPlugin) ?

             getPlugins().findPlugin(AppPlugin) :

             getPlugins().findPlugin(LibraryPlugin)

     if (plugin != null) {

         List<String> runtimeJarList

         if (plugin.getMetaClass().getMetaMethod("getRuntimeJarList")) {

             runtimeJarList = plugin.getRuntimeJarList()

         }

         else if(android.getMetaClass().getMetaMethod("getBootClasspath")) {

             runtimeJarList = android.getBootClasspath()

         } else {

             runtimeJarList = plugin.getBootClasspath()

         }

         for (String runtimeJar : runtimeJarList) {

 //给 proguard 添加 runtime

             libraryjars(runtimeJar)

         }

     }

 }