在android studio中生成jar

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1.在项目中添加module

2.选择android library

3.给library命名

4.在java目下放入要打包成jar的包

5.在dtlslibrary下面的build.gradle 添加

task makeJar(type: Copy) {    delete 'build/libs/mysdk.jar'    from('build/intermediates/bundles/release/')    into('build/libs/')    include('classes.jar')    rename ('classes.jar', 'dtls.jar')}makeJar.dependsOn(build)//在终端执行生成JAR包// gradlew makeJar

6.在终端执行

注意：如果报类似错误

D:\TestUDP>gradlew makeJar
Unzipping C:\Users\nodepp\.gradle\wrapper\dists\gradle-2.8-all\ah86jmo43de9lfa8xg9ux3c4h\gradle-2.8-all.zip to C:\Users\nodepp\.gradle\wrapper\dists\gradle-2.8-all\ah86jmo43de9lfa8xg9ux3c4h
Exception in thread "main" java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:219)
at java.util.zip.ZipFile.<init>(ZipFile.java:149)
at java.util.zip.ZipFile.<init>(ZipFile.java:163)
at org.gradle.wrapper.Install.unzip(Install.java:214)
at org.gradle.wrapper.Install.access$600(Install.java:27)
at org.gradle.wrapper.Install$1.call(Install.java:74)
at org.gradle.wrapper.Install$1.call(Install.java:48)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
at org.gradle.wrapper.Install.createDist(Install.java:48)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)

这个错误是gradle不完整导致的，请到下面网站下载对应的gradle压缩包放到提示的目录下

http://services.gradle.org/distributions/

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