Unable to find explicit activity class BootstrapActivity

[sophiataskova]

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!

[michaelbukachi]

@sophiataskova how did you solve your issue? Facing the same issue.

[copolii]

@sophiataskova it would be really nice if you had left a little more detail as to what you did wrong and what you did to fix it on your end.

[subprogram]

Uninstalling of the test package is helped in my case.

[leonardosibela]

@sophiataskova how did you solve your issue? Facing the same issue.

[MattWilliams89]

Can anyone please share how they resolved this?

[MattWilliams89]

Adding

<activity
   android:name="androidx.test.core.app.InstrumentationActivityInvoker$BootstrapActivity"
   android:label="InstrumentationActivityInvoker$BootstrapActivity" />

to the AndroidManifest of the androidTest sourceSet seems to work, but this feels like a workaround.

[lassana]

I've started seeing this but only on Android 4.4. InstrumentationActivityInvoker$BootstrapActivity class is obviously in the DEX file. What can cause this?

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.Example.test/androidx.test.core.app.InstrumentationActivityInvoker$BootstrapActivity}: java.lang.ClassNotFoundException: Didn't find class "androidx.test.core.app.InstrumentationActivityInvoker$BootstrapActivity" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/data/app/com.example.Example.test-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.Example.test-2, /vendor/lib, /system/lib]]

[Keremturker]

Adding

<activity
   android:name="androidx.test.core.app.InstrumentationActivityInvoker$BootstrapActivity"
   android:label="InstrumentationActivityInvoker$BootstrapActivity" />

to the AndroidManifest of the androidTest sourceSet seems to work, but this feels like a workaround.

it works for me. Thank you :)

[elevenfive]

For Android 13 devices, this is fixed in androidx.test:core:1.5.0-alpha02, see: #1412

[VuNgN]

For Android 13 devices, this is fixed in androidx.test:core:1.5.0-alpha02, see: #1412

It works for me. Thank you 😄

[krischik]

Issue was entirely on my end!

That happens sometimes. But how did you solve it? This is the top search result for the problem. Many people are interested to know how you solved the problem.

Anyway the solution is described in #1412 .

[Wavey1287]

@sophiataskova
Share the solution if you're going to make a post like this. Super selfish to just leave it hanging. Thanks to all the others in this thread that actually contributed. Updating the Testing Dependency in the build.gradle for the module:app to

androidTestImplementation "androidx.test:core-ktx:1.5.0"

worked for me. Was on 1.4.0 before when getting this error. Thanks @VuNgN

[DonMykl]

For Android 13 devices, this is fixed in androidx.test:core:1.5.0-alpha02, see: #1412

Thanks for this, saving for later