关于错误java.util.zip.ZipException: duplicate entry during packageAllDebugClassesForMultiDex

在导入几个外部jar包至AS中lib文件夹，并add as library后，build.gradle文件中生成：

dependencies {
// lib编译jar包
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:recyclerview-v7:23.1.1'
compile('io.socket:socket.io-client:0.7.0') {
exclude group: 'org.json', module: 'json'
}
compile 'com.google.android.gms:play-services:8.4.0'
compile project(':library')
compile files('src/main/libs/universal-image-loader-1.9.4.jar')
compile files('src/main/libs/json-lib-2.4-jdk15.jar')
compile files('src/main/libs/commons-collections-3.2.2.jar')
compile files('src/main/libs/ezmorph-1.0.6.jar')
compile files('src/main/libs/commons-beanutils-1.7.0.jar')
compile files('src/main/libs/commons-lang-2.5.jar')
compile files('src/main/libs/commons-logging.jar')
}

编译报错如标题。

解决办法：

http://stackoverflow.com/questions/26966843/java-util-zip-zipexception-duplicate-entry-during-packagealldebugclassesformult

My understanding is that there are duplicate references to the same API (Likely different version numbers). It should be reasonably easy to debug when building from the command line.

Try ./gradlew yourBuildVariantName –debug from the command line.

The offending item will be the first failure. An example might look like:

14:32:29.171 [INFO] [org.gradle.api.Task] INPUT: /Users/mydir/Documents/androidApp/BaseApp/build/intermediates/exploded-aar/theOffendingAAR/libs/google-play-services.jar

14:32:29.171 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter] Finished executing task ‘:BaseApp:packageAllyourBuildVariantNameClassesForMultiDex’

14:32:29.172 [LIFECYCLE] [class org.gradle.TaskExecutionLogger] :BaseApp:packageAllyourBuildVariantNameClassesForMultiDex FAILED’

In the case above, the aar file that I’d included in my libs directory (theOffendingAAR) included the Google Play Services jar (yes the whole thing. yes I know.) file whilst my BaseApp build file utilised location services:

compile 'com.google.android.gms:play-services-location:6.5.87'

You can safely remove the offending item from your build file(s), clean and rebuild (repeat if necessary).

简单说就是移除compile ‘com.google.android.gms:play-services-location:xxx’来解决。