Solving the "had used a different Landroid/support/v4/app/FragmentActivity; during pre-verification" error

This Stack Overflow pointed to issues with including the support-v4.jar twice.

http://stackoverflow.com/questions/5561353/fragmentactivity-can-not-be-tested-via-activityinstrumentationtestcase2/5645277#5645277

The solution?

If you're using Roboelectric, the support-v4.jar will likely be specified as a compilation dependency.  If you see "(Lcom/example/android/app/FragmentLayoutSupport; had used a different Landroid/support/v4/app/FragmentActivity; during pre-verification) error if it is not excluded.", it's likely it needs to be defined as part of your exclude settings.

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])

    // borrowed from https://github.com/robolectric/deckard-gradle/blob/master/build.gradle
    androidTestCompile 'org.hamcrest:hamcrest-integration:1.1'
    androidTestCompile 'org.hamcrest:hamcrest-core:1.1'
    androidTestCompile 'org.hamcrest:hamcrest-library:1.1'

    // http://saltnlight5.blogspot.com/2012/10/whats-up-with-junit-and-hamcrest.html
    androidTestCompile('junit:junit:4.+') {
        exclude module: 'hamcrest-core'
    }
    androidTestCompile('org.robolectric:robolectric:2.3') {
        exclude module: 'classworlds'
        exclude module: 'commons-logging'
        exclude module: 'httpclient'
        exclude module: 'maven-artifact'
        exclude module: 'maven-artifact-manager'
        exclude module: 'maven-error-diagnostics'
        exclude module: 'maven-model'
        exclude module: 'maven-project'
        exclude module: 'maven-settings'
        exclude module: 'plexus-container-default'
        exclude module: 'plexus-interpolation'
        exclude module: 'plexus-utils'
        exclude module: 'support-v4' // avoid support v4 DEX conflicts
        exclude module: 'wagon-file'
        exclude module: 'wagon-http-lightweight'
        exclude module: 'wagon-provider-api'
    }
}