Robolectric 3 Resource Not Found Error

I am trying to incorporate Robolectric 3 into my project but I seem to be having more issues than I anticipated. At the moment, I am trying to instantiate a simple activity in my test class's setUp method via

MyActivity activity = Robolectric.setupActivity(MyActivity.class);

I have placed the following at the top of my test file:

@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class)

In MyActivity I simply access a string array resource via:

getResources().getStringArray(resId)

After I run the test class (without any test methods, only the setUp method which instantiates the activity), I get the error:

android.content.res.Resources$NotFoundException: String array resource ID #0x7f0c0000
at android.content.res.Resources.getStringArray(Resources.java:502)
at com.alivemobile.tpff.slidingtabs.views.SlidingTabsActivity$3.onItemSelected(SlidingTabsActivity.java:102)
at android.widget.AdapterView.fireOnSelected(AdapterView.java:897)
at android.widget.AdapterView.access$200(AdapterView.java:48)
at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:865)
at org.robolectric.util.Scheduler.runOrQueueRunnable(Scheduler.java:230)
at org.robolectric.util.Scheduler.postDelayed(Scheduler.java:85)
at org.robolectric.util.Scheduler.post(Scheduler.java:72)
at org.robolectric.shadows.ShadowView.post(ShadowView.java:401)
at android.view.View.post(View.java)
at android.widget.AdapterView.selectionChanged(AdapterView.java:882)
at android.widget.AdapterView.checkSelectionChanged(AdapterView.java:1047)
at android.widget.Spinner.layout(Spinner.java:586)
at android.widget.Spinner.onLayout(Spinner.java:527)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.support.v7.widget.Toolbar.layoutChildLeft(Toolbar.java:1565)
at android.support.v7.widget.Toolbar.onLayout(Toolbar.java:1504)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2072)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1829)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at org.robolectric.shadows.ShadowMessageQueue.dispatchMessage(ShadowMessageQueue.java:130)
at org.robolectric.shadows.ShadowMessageQueue.access$100(ShadowMessageQueue.java:30)
at org.robolectric.shadows.ShadowMessageQueue$1.run(ShadowMessageQueue.java:95)
at org.robolectric.util.Scheduler$ScheduledRunnable.run(Scheduler.java:269)
at org.robolectric.util.Scheduler.runOneTask(Scheduler.java:179)
at org.robolectric.util.Scheduler.advanceTo(Scheduler.java:160)
at org.robolectric.util.Scheduler.advanceBy(Scheduler.java:143)
at org.robolectric.util.Scheduler.unPause(Scheduler.java:54)
at org.robolectric.shadows.ShadowLooper.unPause(ShadowLooper.java:266)
at org.robolectric.shadows.ShadowLooper.runPaused(ShadowLooper.java:306)
at org.robolectric.shadows.CoreShadowsAdapter$2.runPaused(CoreShadowsAdapter.java:45)
at org.robolectric.util.ActivityController.visible(ActivityController.java:173)
at org.robolectric.util.ActivityController.setup(ActivityController.java:210)
at org.robolectric.Robolectric.setupActivity(Robolectric.java:46)
at com.alivemobile.tpff.events.views.list.EventsListTests.setUp(EventsListTests.java:20)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:251)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:188)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:54)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:152)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

I have googled around and saw a few people implementing a custom test runner, and I had tried some, but they all seem overly complicated without much explanation as to what is going on. What am I missing?

Thanks in advance.