Unable to find explicit activity class BootstrapActivity

Description

Making my first attempts at using ActivityScenario, and I immediately stumbled upon this exception

android.content.ActivityNotFoundException: Unable to find explicit activity class {com.me.debug.test/androidx.test.core.app.InstrumentationActivityInvoker$BootstrapActivity}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:2005)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1673)
at androidx.test.runner.MonitoringInstrumentation.execStartActivity(MonitoringInstrumentation.java:508)
at android.app.ContextImpl.startActivity(ContextImpl.java:917)
at android.app.ContextImpl.startActivity(ContextImpl.java:888)
at androidx.test.core.app.InstrumentationActivityInvoker.startActivity(InstrumentationActivityInvoker.java:352)
at androidx.test.core.app.ActivityScenario.launch(ActivityScenario.java:207)
at androidx.test.core.app.ActivityScenario.launch(ActivityScenario.java:184)
at androidx.test.ext.junit.rules.ActivityScenarioRule.lambda$new$0$ActivityScenarioRule(ActivityScenarioRule.java:68)
at androidx.test.ext.junit.rules.ActivityScenarioRule$$Lambda$0.get(Unknown Source:2)
at androidx.test.ext.junit.rules.ActivityScenarioRule.before(ActivityScenarioRule.java:82)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:46)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
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.junit.runners.ParentRunner.run(ParentRunner.java:363)
at androidx.test.runner.AndroidJUnit4.run(AndroidJUnit4.java:104)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
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$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:388)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2145) 

Steps to Reproduce

Here’s my code:

import androidx.test.core.app.ActivityScenario
import androidx.test.ext.junit.rules.ActivityScenarioRule
import androidx.test.runner.AndroidJUnit4
import com.me.MainActivity
import org.junit.Before
import org.junit.Rule
import org.junit.Test
import org.junit.runner.RunWith

@RunWith(AndroidJUnit4::class)
class SampleTest {

  private var scenario: ActivityScenario<MainActivity>? = null

  @get:Rule
  val mainActivityScenarioRule = ActivityScenarioRule<MainActivity>(MainActivity::class.java)

  @Before
  fun init() {
    scenario = mainActivityScenarioRule.scenario
  }

  @Test
  fun basicUseCase() {
  }
}

Expected Results

scenario gets created and I’m able to drive MainActivity’s lifecycle with it

Actual Results

android.content.ActivityNotFoundException

AndroidX Test and Android OS Versions

    androidTestImplementation "androidx.test:runner:$androidx_test_runner_version"
    androidTestImplementation "androidx.test.espresso:espresso-core:$androidx_test_espresso_version"
    androidTestImplementation "androidx.test.espresso:espresso-contrib:$androidx_test_espresso_version"
    androidTestImplementation "androidx.test.espresso:espresso-intents:$androidx_test_espresso_version"
    androidTestImplementation "androidx.test.uiautomator:uiautomator:$androidx_test_uiautomator_version"
    androidTestImplementation "androidx.test.ext:junit:$androidx_test_ext_version"
    androidTestImplementation "androidx.test.ext:junit-ktx:$androidx_test_ext_version"
    androidTestImplementation "com.google.truth:truth:$google_truth_version"

where

    androidx_test_runner_version = '1.1.1'
    androidx_test_espresso_version = '3.1.1'
    androidx_test_uiautomator_version = '2.2.0'
    androidx_test_ext_version = '1.1.0'

Link to a public git repo demonstrating the problem:

Let me know if I should make one, I wonder if I’m just missing something obvious and this isn’t a bug.

[sophiataskova]

Issue was entirely on my end!

[elevenfive]

For Android 13 devices, this is fixed in androidx.test:core:1.5.0-alpha02, see: https://github.com/android/android-test/issues/1412