android studio 混淆后，打包报错!!!

``

Exception while processing task

java.io.IOException: The same input jar [E:\Work\gv\app\libs\open_sdk_r5509.jar] is specified twice.
> at proguard.ConfigurationChecker.checkConflicts(ConfigurationChecker.java:216)
> at proguard.ConfigurationChecker.check(ConfigurationChecker.java:83)
> at proguard.ProGuard.execute(ProGuard.java:73)
> at proguard.gradle.ProGuardTask.proguard(ProGuardTask.java:1074)
> at com.android.build.gradle.tasks.AndroidProGuardTask.doMinification(AndroidProGuardTask.java:139)
at com.android.build.gradle.tasks.AndroidProGuardTask$1.run(AndroidProGuardTask.java:115)
> at com.android.builder.tasks.Job.runTask(Job.java:48)
> at com.android.build.gradle.tasks.SimpleWorkQueue$EmptyThreadContext.runTask(SimpleWorkQueue.java:41)
> at com.android.builder.tasks.WorkQueue.run(WorkQueue.java:227)
> at java.lang.Thread.run(Thread.java:745)
:app:dexAnzhiRelease UP-TO-DATE

:app:validateReleaseSigning

:app:packageAnzhiRelease FAILED

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':app:packageAnzhiRelease'. Unable to compute hash of E:\Work\gv\app\build\intermediates\classes-proguard\anzhi\release\classes.jar

• Try:
  > Run with --stacktrace option to get the stack trace. Run with --info or --debug > option to get more log output.

BUILD FAILED

Total time: 18.962 secs
`

请大神指导，小弟在线求。刚才在网上学习了混淆技巧，把混淆模板复制过去，然后打包报错。

还是自己 解决了还是自己 解决了

-libraries xxx.jar

将混淆文件中的–librarys libs/xxx 这行删除掉就行了。用在eclipse中是需要，用在android studio中时不需要这行了。

通过 Android Studio进行 混淆代码时，默认已经将 lib目录中的 jar 都已经添加到打包脚本中，所以不需要再次手动添加，否则会出现“ java.io.IOException: The same input jar is specified twice” 错误