android-navigation-3
Install and migrate to Jetpack Navigation 3. Use when implementing Navigation 3 patterns including NavDisplay, NavKey routes, deep links, multiple backstacks, scenes (dialogs, bottom sheets), or migrating from Navigation 2.
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SKILL.md
Jetpack Navigation 3
Priority: P1 (HIGH)
Guide for implementing and migrating to Navigation 3 in Jetpack Compose.
Core concepts
Navigation 3 replaces the previous NavHost/NavController pattern with a simpler, state-driven approach:
- Routes are Kotlin data objects/classes (not strings).
- Back stack is a plain
mutableStateListOf<Any>. NavDisplayrenders the current route based on a lambda.
Basic usage
val backStack = remember { mutableStateListOf<Any>(RouteHome) }
NavDisplay(
backStack = backStack,
onBack = { backStack.removeLastOrNull() },
entryProvider = { key ->
when (key) {
is RouteHome -> NavEntry(key) { HomeScreen(onNavigate = { backStack.add(it) }) }
is RouteDetail -> NavEntry(key) { DetailScreen(key.id) }
else -> error("Unknown route: $key")
}
}
)
Migration from Navigation 2
See migration guide for step-by-step conversion from NavHost/NavController to NavDisplay.
Key changes:
- Replace string routes with data objects/classes.
- Replace
NavHostwithNavDisplay. - Replace
NavController.navigate()with direct list manipulation. - Replace
navArgumentwith data class properties.
Common patterns
See recipes for code examples:
- Basic navigation with arguments
- Bottom navigation with multiple backstacks
- Deep links (basic and with synthetic backstack)
- Dialogs and bottom sheets
- Conditional navigation (auth flows)
- Returning results between screens
- Modularized navigation with Hilt or Koin
Verification
- Routes are data objects/classes, no string-based routing.
- Back stack is a
mutableStateListOf<Any>. -
NavDisplayhandles all routes inentryProvider. -
./gradlew buildsucceeds.
Anti-Patterns
- No string-based routes: Use Kotlin data objects/classes for type safety.
- No NavController for new projects: Use
NavDisplaywith a state list. - No
remember { navController() }: Navigation 3 doesn't use NavController.
References
Files
4- SKILL.md
8d88c06ca52.7 KB - evals/evals.json
a36df7b2772.5 KB - references/migration-guide.md
acb18e2f5b3.0 KB - references/recipes.md
9ed9ae097f4.0 KB
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