Android问题集锦之四十八：Error:duplicate files during packaging of APK

端午小长假最后一天，大雨。只好在家里鼓捣自己喜欢的代码了。

在将dom4j.jar也加入fastjson测试程序中，编译出错，如下：

Error:duplicate files during packaging of APK /home/linc/workspace/lab/FastjsonTestor/app/build/outputs/apk/app-debug-unaligned.apk
Path in archive: META-INF/LICENSE.txt
Origin 1: /home/linc/workspace/lab/FastjsonTestor/app/libs/fastjson-1.1.45.android.jar
Origin 2: /home/linc/workspace/lab/FastjsonTestor/app/libs/dom4j-1.6.1.jar
You can ignore those files in your build.gradle:
android {
packagingOptions {
exclude 'META-INF/LICENSE.txt'
}
}
Error:Execution failed for task ':app:packageDebug'.
> Duplicate files copied in APK META-INF/LICENSE.txt
File 1: /home/linc/workspace/lab/FastjsonTestor/app/libs/fastjson-1.1.45.android.jar
File 2: /home/linc/workspace/lab/FastjsonTestor/app/libs/dom4j-1.6.1.jar

原来LICENSE.txt出现了冲突，根据提示，我们只要在build.gradle中做些修改将LICENSE.txt剔除出去即可。

android {
compileSdkVersion 19
buildToolsVersion "19.1.0"

defaultConfig {
applicationId "com.linc.fastjsontestor"
minSdkVersion 19
targetSdkVersion 19
versionCode 1
versionName "1.0"
}

packagingOptions {
exclude 'META-INF/NOTICE'
exclude 'META-INF/LICENSE'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/NOTICE.txt'
}
。。。

参考：

http://stackoverflow.com/questions/22467127/error-duplicate-files-during-packaging-of-apk