Android tests build error: Multiple dex files define Landroid/support/test/BuildConfig

Question

I\'m trying to add Espresso 2 to my project (which also has lots of other dependencies), but I\'m hitting this error when trying to run tests:

UNEXPECTED TOP         


        

Answer 1

I got this error trying to set up Espresso as well. Try using espresso-contrib:2.1, not 2.0

Answer 2

Try excluding the following from espresso (one at a time):

androidTestCompile('com.android.support.test.espresso:espresso-core:2.1') {
  exclude group: 'javax.inject'
  exclude group: 'com.google.code.findbugs'
  exclude group: 'com.android.support', module: 'support-annotations'
}

Probably need to do the same with runner

Answer 3

I recently ran into this error after we enabled incremental gradle builds.

dexOptions {
    javaMaxHeapSize "2g"
    incremental true
}

This was resolved by disabling predexing libraries.

dexOptions {
    javaMaxHeapSize "2g"
    incremental true
    preDexLibraries = false
}

Answer 4

According to this bug report, you can also use resolutionStrategy:

allprojects {
    repositories {
        mavenCentral()
        maven {
            url 'http://download.crashlytics.com/maven'
        }
    }
    configurations.all {
        resolutionStrategy.force 'com.android.support:support-annotations:22.2.0'
    }
}

This is the solution that worked for me and allowed me to use the most recent version of appcompat-v7 and appcompat-v4.

Answer 5

One other useful tip is how to force dependency resolution to a specific version.

Here is one way:

configurations.all {
    resolutionStrategy.force 'com.android.support:support-annotations:22.0.0'
}

...and here is another:

configurations.all {
    resolutionStrategy.eachDependency { DependencyResolveDetails details ->
        if (details.requested.group == 'com.android.support') {
            details.useVersion '22.0.0'
        }
    }
}

Using either of these with com.android.support.test.espresso:espresso-core:2.1 should work.

See the Forcing consistent version for a group of libraries section in the Gradle documentation for more information.

Answer 6

My solution:

compile 'com.android.support:appcompat-v7:22.1.0'
androidTestCompile 'com.android.support.test.espresso:espresso-core:2.1'
androidTestCompile 'com.android.support:support-annotations:22.1.0'
androidTestCompile 'com.android.support.test:runner:0.2'

+

android {
    packagingOptions {
        exclude 'LICENSE.txt'
   }
}