HiltTestActivity fails with error "You need to use a Theme.AppCompat theme (or descendant) with this activity."

[sarimmehdi]

I am following the code from here:

// inside debug folder
@SuppressLint("CustomSplashScreen")
@AndroidEntryPoint
class SplashScreenActivityTest: AppCompatActivity()

Then the AndroidManifest.xml for the debug folder:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application>
        <activity android:name=".SplashScreenActivityTest"
            android:exported="false"/>
    </application>

</manifest>

This is what my instrumentation test looks like:

@HiltAndroidTest
class SplashScreenFragmentTest {

    @get:Rule
    var hiltRule = HiltAndroidRule(this)

    @Before
    fun setup() {
        hiltRule.inject()
    }

    @OptIn(ExperimentalCoroutinesApi::class)
    @Test
    fun splashScreenExitsToLoginScreenAfter3Seconds() {
        launchFragmentInHiltContainer<SplashScreenFragment> {

        }
    }
}

When I run my Instrumentation Test, I get the following error:

java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:856)
at androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:819)
at androidx.appcompat.app.AppCompatDelegateImpl.onPostCreate(AppCompatDelegateImpl.java:536)
at androidx.appcompat.app.AppCompatActivity.onPostCreate(AppCompatActivity.java:151)
at android.app.Instrumentation.callActivityOnPostCreate(Instrumentation.java:1383)
at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3891)
at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
at android.app.servertransaction.TransactionExehttps://github.com/android/architecture-samples/blob/views-hilt/app/src/debug/java/com/example/android/architecture/blueprints/todoapp/HiltTestActivity.ktcutor.execute(TransactionExecutor.java:97)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2328)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:246)
at android.app.ActivityThread.main(ActivityThread.java:8645)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)

I am able to get rid of the error by applying a theme inside the AndroidManifest.xml file of debug:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application android:theme="@style/someThemeThatInheritsFromThemeAppCompat">
        <activity android:name=".SplashScreenActivityTest"
            android:exported="false"/>
    </application>

</manifest>

But then the prod version of my app (which also uses a custom theme derived from Theme.AppCompat inside the manifest for the app module), fails to run and complains with the following error (:feature_splash:splash_presentation is the module where I created the debug folder with the test activity similar to what is shown here):

Manifest merger failed : Attribute application@theme value=(@style/myCustomTheme) from AndroidManifest.xml:13:9-46
    is also present at [:feature_splash:splash_presentation] AndroidManifest.xml:10:18-59 value=(@style/mdCockpitBaseTheme).
    Suggestion: add 'tools:replace="android:theme"' to <application> element at AndroidManifest.xml:5:5-28:19 to override.

Is there a way to make the instrumentation test run without adding that extra theme in the manifest for debug? This is what my launchFragmentInHiltContainer looks like btw:

@ExperimentalCoroutinesApi
inline fun <reified T : Fragment> launchFragmentInHiltContainer(
    fragmentArgs: Bundle? = null,
    themeResId: Int = androidx.fragment.testing.R.style.FragmentScenarioEmptyFragmentActivityTheme,
    fragmentFactory: FragmentFactory? = null,
    crossinline action: T.() -> Unit = {}
) {
    val mainActivityIntent = Intent.makeMainActivity(
        ComponentName(
            ApplicationProvider.getApplicationContext(),
            SplashScreenActivityTest::class.java
        )
    ).putExtra(
        "androidx.fragment.app.testing.FragmentScenario.EmptyFragmentActivity.THEME_EXTRAS_BUNDLE_KEY",
        themeResId
    )

    ActivityScenario.launch<SplashScreenActivityTest>(mainActivityIntent).onActivity { activity ->
        fragmentFactory?.let {
            activity.supportFragmentManager.fragmentFactory = it
        }
        val fragment = activity.supportFragmentManager.fragmentFactory.instantiate(
            Preconditions.checkNotNull(T::class.java.classLoader),
            T::class.java.name
        )
        fragment.arguments = fragmentArgs

        activity.supportFragmentManager.beginTransaction()
            .add(android.R.id.content, fragment, "")
            .commitNow()

        (fragment as T).action()
    }
}

[sarimmehdi]

Ok, so I solved the issue by replacing my HiltTestActivity with this one (courtesy of this):

@SuppressLint("CustomSplashScreen")
@AndroidEntryPoint
class SplashScreenActivityTest: AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setTheme(
            intent.getIntExtra(
                "androidx.fragment.app.testing.FragmentScenario.EmptyFragmentActivity.THEME_EXTRAS_BUNDLE_KEY",
                androidx.fragment.testing.R.style.FragmentScenarioEmptyFragmentActivityTheme
            )
        )
    }
}

Then, inside launchFragmentInHiltContainer, I provided my app's custom theme which inherits from Theme.AppCompat:

@ExperimentalCoroutinesApi
inline fun <reified T : Fragment> launchFragmentInHiltContainer(
    fragmentArgs: Bundle? = null,
    themeResId: Int = R.style.myCustomeTheme,
    fragmentFactory: FragmentFactory? = null,
    crossinline action: T.() -> Unit = {}
) {
    val mainActivityIntent = Intent.makeMainActivity(
        ComponentName(
            ApplicationProvider.getApplicationContext(),
            SplashScreenActivityTest::class.java
        )
    ).putExtra(
        "androidx.fragment.app.testing.FragmentScenario.EmptyFragmentActivity.THEME_EXTRAS_BUNDLE_KEY",
        themeResId
    )

    ActivityScenario.launch<SplashScreenActivityTest>(mainActivityIntent).onActivity { activity ->
        fragmentFactory?.let {
            activity.supportFragmentManager.fragmentFactory = it
        }
        val fragment = activity.supportFragmentManager.fragmentFactory.instantiate(
            Preconditions.checkNotNull(T::class.java.classLoader),
            T::class.java.name
        )
        fragment.arguments = fragmentArgs

        activity.supportFragmentManager.beginTransaction()
            .add(android.R.id.content, fragment, "")
            .commitNow()

        (fragment as T).action()
    }
}