java.lang.IncompatibleClassChangeError when including espresso-contrib:2.0

Question

I have a subclass of android.support.v7.widget.RecyclerView. It works fine when I use the application and testing.

However, when I include espresso-contrib in my gra

Answer 1

You can try to add that at the bottom of your gradle file (after every char)

/*
Resolves dependency versions across test and production APKs, specifically, transitive
dependencies. This is required since Espresso internally has a dependency on support-annotations.
*/
configurations.all {
    resolutionStrategy.force "com.android.support:support-annotations:$rootProject.supportLibraryVersion"
}

/*
All direct/transitive dependencies shared between your test and production APKs need to be
excluded from the test APK! This is necessary because both APKs will contain the same classes. Not
excluding these dependencies from your test configuration will result in an dex pre-verifier error
at runtime. More info in this tools bug: (https://code.google.com/p/android/issues/detail?id=192497)
*/
configurations.compile.dependencies.each { compileDependency ->
    println "Excluding compile dependency: ${compileDependency.getName()}"
    configurations.androidTestCompile.dependencies.each { androidTestCompileDependency ->
        configurations.androidTestCompile.exclude module: "${compileDependency.getName()}"
    }
}

It's from the Android-testing project on github

Source: https://github.com/googlecodelabs/android-testing/blob/master/app/build.gradle#L96