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Back handler navigation crash #420

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Back handler navigation crash#420
@oleginvoke

Description

@oleginvoke
oleginvoke
opened on Sep 5, 2025

Describe the bug
When I open the Showkase browser via Showkase.getBrowserIntent(context) everything works fine, but when I press the Back button to return to my app, the app crashes with an exception

It looks like Showkase tries to navigate back to SHOWKASE_CATEGORIES, but the destination is no longer available in the NavController once the Activity has been popped from the back stack.

Steps to reproduce

  1. Create a separate preview module with a ShowkaseRootModule implementation:
   @ShowkaseRoot
   class ShowkaseRoot : ShowkaseRootModule
  1. Create a startPreviewActivity function in the preview module:
fun startPreviewActivity(
    context: Context,
) {
    val intent = Showkase.getBrowserIntent(context)
    context.startActivity(intent)
}
  1. In the app module, add the preview module dependency:
debugImplementation(projects.preview)
  1. In the app module, open Showkase with:
val context = LocalContext.current
Button(
    modifier = Modifier
        .fillMaxWidth(),
    size = Sizes.s32,
    style = ButtonStyle.default,
    text = "previews",
    onClick = {
        startPreviewActivity(context)
    }
)

  1. Press Back to return to the app.

  2. Crash:

else
Exception dispatching finished signal for seq=21
Exception in MessageQueue callback: handleReceiveCallback
java.lang.IllegalArgumentException: Navigation destination that matches request NavDeepLinkRequest{ uri=android-app://androidx.navigation/SHOWKASE_CATEGORIES } cannot be found in the navigation graph ComposeNavGraph(0x0) startDestination={Destination(0x7bb10103) route=COMPONENT_GROUPS}
	at androidx.navigation.NavController.navigate(NavController.kt:1819)
	at androidx.navigation.NavController.navigate(NavController.kt:2225)
	at androidx.navigation.NavController.navigate$default(NavController.kt:2220)
	at com.airbnb.android.showkase.ui.ShowkaseBrowserAppKt$ShowkaseBrowserApp$1$2.invoke$lambda$2$lambda$1$lambda$0(ShowkaseBrowserApp.kt:126)
	at com.airbnb.android.showkase.ui.ShowkaseBrowserAppKt$ShowkaseBrowserApp$1$2.$r8$lambda$Qq3GDYNFZKdQIiZhdRepzNU8H0s(Unknown Source:0)
	at com.airbnb.android.showkase.ui.ShowkaseBrowserAppKt$ShowkaseBrowserApp$1$2$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.ShowkaseComponentGroupsScreen$lambda$12$lambda$11(ShowkaseGroupsScreen.kt:106)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.$r8$lambda$az9GZkTLuEOzyS_1jM_zIWo2ldA(Unknown Source:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt$$ExternalSyntheticLambda10.invoke(D8$$SyntheticClass:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.ShowkaseGroupsScreen$lambda$7$lambda$6$lambda$4(ShowkaseGroupsScreen.kt:58)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.$r8$lambda$yc03hJN6FJo68iVkSKTdYdAzevE(Unknown Source:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt$$ExternalSyntheticLambda3.invoke(D8$$SyntheticClass:0)
	at com.airbnb.android.showkase.ui.ShowkaseCategoriesScreenKt.goBackToCategoriesScreen(ShowkaseCategoriesScreen.kt:93)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.ShowkaseGroupsScreen$lambda$7$lambda$6(ShowkaseGroupsScreen.kt:53)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.$r8$lambda$_5ZzVCgKyJrM-QQyvH5yOIN_Fr8(Unknown Source:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt$$ExternalSyntheticLambda1.invoke(D8$$SyntheticClass:0)
	at androidx.activity.compose.BackHandlerKt$BackHandler$backCallback$1$1.handleOnBackPressed(BackHandler.kt:89)
	at androidx.activity.OnBackPressedDispatcher.onBackPressed(OnBackPressedDispatcher.kt:279)
	at androidx.activity.ComponentActivity.onBackPressed(ComponentActivity.kt:612)
	at android.app.Activity.onKeyUp(Activity.java:4148)
	at android.view.KeyEvent.dispatch(KeyEvent.java:3053)
	at android.app.Activity.dispatchKeyEvent(Activity.java:4496)
	at androidx.core.app.ComponentActivity.superDispatchKeyEvent(ComponentActivity.kt:103)
	at androidx.core.view.KeyEventDispatcher.dispatchKeyEvent(KeyEventDispatcher.java:85)
	at androidx.core.app.ComponentActivity.dispatchKeyEvent(ComponentActivity.kt:117)
	at androidx.appcompat.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:604)
	at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:60)
	at androidx.appcompat.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:3413)
	at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:360)
	at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:7866)
	at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:7706)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:7106)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:7163)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:7129)
	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:7295)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:7137)
	at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:7352)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:7110)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:7163)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:7129)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:7137)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:7110)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:7163)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:7129)
	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:7328)
	at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:7554)
	at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:4871)
	at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:4262)
	at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:4253)
	at android.view.inputmethod.InputMethodManager.-$$Nest$mfinishedInputEvent(Unknown Source:0)
	at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:4848)
	at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:181)
	at android.os.MessageQueue.nativePollOnce(Native Method)
	at android.os.MessageQueue.next(MessageQueue.java:346)
	at android.os.Looper.loopOnce(Looper.java:189)
	at android.os.Looper.loop(Looper.java:317)
	at android.app.ActivityThread.main(ActivityThread.java:8705)

                                                                                                    	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:580)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:886)
Shutting down VM
FATAL EXCEPTION: main
Process: stg.design_system_sample, PID: 23317
java.lang.IllegalArgumentException: Navigation destination that matches request NavDeepLinkRequest{ uri=android-app://androidx.navigation/SHOWKASE_CATEGORIES } cannot be found in the navigation graph ComposeNavGraph(0x0) startDestination={Destination(0x7bb10103) route=COMPONENT_GROUPS}
	at androidx.navigation.NavController.navigate(NavController.kt:1819)
	at androidx.navigation.NavController.navigate(NavController.kt:2225)
	at androidx.navigation.NavController.navigate$default(NavController.kt:2220)
	at com.airbnb.android.showkase.ui.ShowkaseBrowserAppKt$ShowkaseBrowserApp$1$2.invoke$lambda$2$lambda$1$lambda$0(ShowkaseBrowserApp.kt:126)
	at com.airbnb.android.showkase.ui.ShowkaseBrowserAppKt$ShowkaseBrowserApp$1$2.$r8$lambda$Qq3GDYNFZKdQIiZhdRepzNU8H0s(Unknown Source:0)
	at com.airbnb.android.showkase.ui.ShowkaseBrowserAppKt$ShowkaseBrowserApp$1$2$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.ShowkaseComponentGroupsScreen$lambda$12$lambda$11(ShowkaseGroupsScreen.kt:106)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.$r8$lambda$az9GZkTLuEOzyS_1jM_zIWo2ldA(Unknown Source:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt$$ExternalSyntheticLambda10.invoke(D8$$SyntheticClass:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.ShowkaseGroupsScreen$lambda$7$lambda$6$lambda$4(ShowkaseGroupsScreen.kt:58)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.$r8$lambda$yc03hJN6FJo68iVkSKTdYdAzevE(Unknown Source:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt$$ExternalSyntheticLambda3.invoke(D8$$SyntheticClass:0)
	at com.airbnb.android.showkase.ui.ShowkaseCategoriesScreenKt.goBackToCategoriesScreen(ShowkaseCategoriesScreen.kt:93)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.ShowkaseGroupsScreen$lambda$7$lambda$6(ShowkaseGroupsScreen.kt:53)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt.$r8$lambda$_5ZzVCgKyJrM-QQyvH5yOIN_Fr8(Unknown Source:0)
	at com.airbnb.android.showkase.ui.ShowkaseGroupsScreenKt$$ExternalSyntheticLambda1.invoke(D8$$SyntheticClass:0)
	at androidx.activity.compose.BackHandlerKt$BackHandler$backCallback$1$1.handleOnBackPressed(BackHandler.kt:89)
	at androidx.activity.OnBackPressedDispatcher.onBackPressed(OnBackPressedDispatcher.kt:279)
	at androidx.activity.ComponentActivity.onBackPressed(ComponentActivity.kt:612)
	at android.app.Activity.onKeyUp(Activity.java:4148)
	at android.view.KeyEvent.dispatch(KeyEvent.java:3053)
	at android.app.Activity.dispatchKeyEvent(Activity.java:4496)
	at androidx.core.app.ComponentActivity.superDispatchKeyEvent(ComponentActivity.kt:103)
	at androidx.core.view.KeyEventDispatcher.dispatchKeyEvent(KeyEventDispatcher.java:85)
	at androidx.core.app.ComponentActivity.dispatchKeyEvent(ComponentActivity.kt:117)
	at androidx.appcompat.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:604)
	at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:60)
	at androidx.appcompat.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:3413)
	at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:360)
	at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:7866)
	at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:7706)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:7106)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:7163)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:7129)
	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:7295)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:7137)
	at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:7352)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:7110)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:7163)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:7129)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:7137)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:7110)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:7163)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:7129)
	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:7328)
	at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:7554)
	at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:4871)
	at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:4262)
	at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:4253)
	at android.view.inputmethod.InputMethodManager.-$$Nest$mfinishedInputEvent(Unknown Source:0)
	at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:4848)
	at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:181)
	at android.os.MessageQueue.nativePollOnce(Native Method)
	at android.os.MessageQueue.next(MessageQueue.java:346)
	at android.os.Looper.loopOnce(Looper.java:189)
	at android.os.Looper.loop(Looper.java:317)
	at android.app.ActivityThread.main(ActivityThread.java:8705)

                                                                                                    	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:580)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:886)

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