Adding httpcore and httpmime libraries to Android project gives an error in running the app

问题

In my Android app I'm using httpcore and httpmime libraries. My build.gradle files dependancy section contains below part,

compile 'org.apache.httpcomponents:httpcore:4.4.4'
compile 'org.apache.httpcomponents:httpmime:4.5.2'

and when I'm running the app gives an error. the log is as shown below,

Error:Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'.
 > com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK META-INF/NOTICE
        File1: /Users/marpak/.gradle/caches/modules-2/files-2.1/org.apache.httpcomponents/httpmime/4.5.2/22b4c53dd9b6761024258de8f9240c3dce6ea368/httpmime-4.5.2.jar
        File2: /Users/marpak/.gradle/caches/modules-2/files-2.1/org.apache.httpcomponents/httpcore/4.4.4/b31526a230871fbe285fbcbe2813f9c0839ae9b0/httpcore-4.4.4.jar

how can i fix this

回答1:

add this in your build.gradle file

android {
    packagingOptions {
    exclude 'META-INF/DEPENDENCIES.txt'
    exclude 'META-INF/LICENSE.txt'
    exclude 'META-INF/NOTICE.txt'
    exclude 'META-INF/NOTICE'
    exclude 'META-INF/LICENSE'
    exclude 'META-INF/DEPENDENCIES'
    exclude 'META-INF/notice.txt'
    exclude 'META-INF/license.txt'
    exclude 'META-INF/dependencies.txt'
    exclude 'META-INF/LGPL2.1'
    }
}

回答2:

Better to use this one, it will include only one license file, some licenses (most of open source) do not allow to exclude license from final code:

    packagingOptions {
    pickFirst 'META-INF/DEPENDENCIES.txt'
    pickFirst 'META-INF/LICENSE.txt'
    pickFirst 'META-INF/NOTICE.txt'
    pickFirst 'META-INF/NOTICE'
    pickFirst 'META-INF/LICENSE'
    pickFirst 'META-INF/DEPENDENCIES'
    pickFirst 'META-INF/notice.txt'
    pickFirst 'META-INF/license.txt'
    pickFirst 'META-INF/dependencies.txt'
    pickFirst 'META-INF/LGPL2.1'
}

It is not the best option since if you will have different license files with the same name you will loose one, but much better than exclude everything.

来源：https://stackoverflow.com/questions/36978528/adding-httpcore-and-httpmime-libraries-to-android-project-gives-an-error-in-runn

标签

android

http

build.gradle