Exclude .jar from compile in Android Studio with Gradle

Question

I currently have something like this in the build.gradle file.

dependencies {
    compile 'com.android.support:support-v4:13.0.+'
    compile ('com.xxx:xxx-commons:1.+') {

    }
}

A problem arises since both jUnit and hamcrest-core are present in the com.xxx:xxx maven repository, creating an error like this:

Gradle: Origin 1: /Users/yyy/.gradle/caches/artifacts-26/filestore/junit/junit/4.11/jar/4e031bb61df09069aeb2bffb4019e7a5034a4ee0/junit-4.11.jar
Gradle: Origin 2: /Users/yyy/.gradle/caches/artifacts-26/filestore/org.hamcrest/hamcrest-core/1.3/jar/42a25dc3219429f0e5d060061f71acb49bf010a0/hamcrest-core-1.3.jar

Gradle: Execution failed for task ':android:packageDebug'.
> Duplicate files copied in APK LICENSE.txt
File 1: /Users/yyy/.gradle/caches/artifacts-26/filestore/junit/junit/4.11/jar/4e031bb61df09069aeb2bffb4019e7a5034a4ee0/junit-4.11.jar
File 2: /Users/yyy/.gradle/caches/artifacts-26/filestore/junit/junit/4.11/jar/4e031bb61df09069aeb2bffb4019e7a5034a4ee0/junit-4.11.jar

Since jUnit actually includes the hamcrest library these days is there a way to actually exclude the jar that is: hamcrest-core-1.3.jar Or exclude all .txt files, or exclude jUnit all together from the maven repository (it's not used).

Any other ideas that could be helpful?

Solution

Yes, you can exclude transitive dependencies:

In your case this would be:

dependencies {
    compile 'com.android.support:support-v4:13.0.+'
    compile ("com.xxx:xxx-commons:1.+") {
        exclude group: 'junit', module: 'junit'
    }
}

or

configurations {
    all*.exclude group: 'junit', module: 'junit'
}