Getting error while taking the Screenshots using fastlane

Question

I am getting the error while capturing the screenshots using the fastlane

Code in my androidTest

@RunWith(AndroidJUnit4.class)
public class ExampleInstrumentedTest {
    @Test
    public void useAppContext() throws Exception {
        // Context of the app under test.
        Context appContext = InstrumentationRegistry.getTargetContext();

        assertEquals("com.tcc.gstknowledge", appContext.getPackageName());
    }

    @ClassRule
    public static final LocaleTestRule localeTestRule = new LocaleTestRule();

    @Rule
    public ActivityTestRule<MainActivity> activityRule = new ActivityTestRule<>(MainActivity.class);

    @Test
    public void testTakeScreenshot() {
        Screengrab.setDefaultScreenshotStrategy(new UiAutomatorScreenshotStrategy());
        Screengrab.screenshot("before_button_click");

        // Your custom onView...
        onView(withId(R.id.activity_btn1)).perform(click());

        Screengrab.screenshot("after_button_click");
    }
}

I have a lane file with this code.

 lane :screenshots do
    capture_android_screenshots
    #upload_to_play_store
  end

  desc "assembleDebug assembleAndroidTest"
  lane :assembleScreengrab do
    gradle(task: "assembleDebug assembleAndroidTest")
  end

I am trying to execute the following commands in the terminal inside my project folder.

1. fastlane assembleScreengrab for the creating the debug build and test debug build.
2. fastlane screenshots for the capturing the Screenshots.

But when i am trying to capture screenshot by executing the fastlane screenshots it will give me the following error of the

INSTRUMENTATION_STATUS_CODE: -1

Detailed Error Screenshot :-

Answer 1

I got the error and the solution is add this line in your build.gradle file i have an old project so it will not added in that particular project but now days it will come by default when we are creating the android project.

defaultConfig {
   ....
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
   ....
}