NavHost

Artifact: androidx.navigation:navigation-runtime

View Source

Added in 1.0.0

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Kotlin |Java

interface NavHost

Known direct subclasses

NavHostFragment

NavHostFragment

NavHostFragment provides an area within your layout for self-contained navigation to occur.

Known indirect subclasses

DynamicNavHostFragment

DynamicNavHostFragment

The NavHostFragment for dynamic features.

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A host is a single context or container for navigation via a NavController.

It is strongly recommended to construct the nav controller by instantiating a NavHostController, which offers additional APIs specifically for a NavHost. The NavHostController should still only be externally accessible as a NavController, rather than directly exposing it as a NavHostController.

Navigation hosts must:

• Handle saving and restoring their controller's state

• Call Navigation.setViewNavController on their root view

• Route system Back button events to the NavController either by manually calling NavController.popBackStack or by calling NavHostController.setOnBackPressedDispatcher when constructing the NavController.

Optionally, a navigation host should consider calling:

• Call NavHostController.setLifecycleOwner to associate the NavController with a specific Lifecycle.

• Call NavHostController.setViewModelStore to enable usage of NavController.getViewModelStoreOwner and navigation graph scoped ViewModels.

Summary

Public properties
NavController	navController The navigation controller for this navigation host.

Extension functions
inline NavGraph	NavHost.createGraph(     id: @IdRes Int,     startDestination: @IdRes Int,     builder: NavGraphBuilder.() -> Unit ) This function is deprecated. Use routes to create your NavGraph instead
inline NavGraph	NavHost.createGraph(     id: @IdRes Int,     startDestination: @IdRes Int,     builder: DynamicNavGraphBuilder.() -> Unit ) This function is deprecated. Use routes to create your dynamic NavGraph instead
inline NavGraph	NavHost.createGraph(     startDestination: String,     route: String?,     builder: NavGraphBuilder.() -> Unit ) Construct a new NavGraph
inline NavGraph	NavHost.createGraph(     startDestination: String,     route: String?,     builder: DynamicNavGraphBuilder.() -> Unit ) Construct a new androidx.navigation.NavGraph that supports dynamic navigation destinations
inline NavGraph	@ExperimentalSafeArgsApi NavHost.createGraph(     startDestination: Any,     route: KClass<*>?,     typeMap: Map<KType, NavType<*>>,     builder: NavGraphBuilder.() -> Unit ) Construct a new NavGraph
inline NavGraph	@ExperimentalSafeArgsApi NavHost.createGraph(     startDestination: KClass<*>,     route: KClass<*>?,     typeMap: Map<KType, NavType<*>>,     builder: NavGraphBuilder.() -> Unit ) Construct a new NavGraph

Public properties

navController

Added in 1.0.0

val navController: NavController

The navigation controller for this navigation host.

Extension functions

createGraph

Artifact: androidx.navigation:navigation-runtime

View Source

inline fun NavHost.createGraph(
    id: @IdRes Int = 0,
    startDestination: @IdRes Int,
    builder: NavGraphBuilder.() -> Unit
): NavGraph

This function is deprecated.
Use routes to create your NavGraph instead

Construct a new NavGraph

createGraph

Artifact: androidx.navigation:navigation-dynamic-features-runtime

View Source

inline fun NavHost.createGraph(
    id: @IdRes Int = 0,
    startDestination: @IdRes Int,
    builder: DynamicNavGraphBuilder.() -> Unit
): NavGraph

This function is deprecated.
Use routes to create your dynamic NavGraph instead

Construct a new androidx.navigation.NavGraph that supports dynamic navigation destinations

createGraph

Artifact: androidx.navigation:navigation-runtime

View Source

inline fun NavHost.createGraph(
    startDestination: String,
    route: String? = null,
    builder: NavGraphBuilder.() -> Unit
): NavGraph

Construct a new NavGraph

createGraph

Artifact: androidx.navigation:navigation-dynamic-features-runtime

View Source

inline fun NavHost.createGraph(
    startDestination: String,
    route: String? = null,
    builder: DynamicNavGraphBuilder.() -> Unit
): NavGraph

Construct a new androidx.navigation.NavGraph that supports dynamic navigation destinations

createGraph

Artifact: androidx.navigation:navigation-runtime

View Source

@ExperimentalSafeArgsApi
inline fun NavHost.createGraph(
    startDestination: Any,
    route: KClass<*>? = null,
    typeMap: Map<KType, NavType<*>> = emptyMap(),
    builder: NavGraphBuilder.() -> Unit
): NavGraph

Construct a new NavGraph

Parameters
startDestination: Any	the starting destination's route from an Object for this NavGraph. The respective NavDestination must be added as a KClass in order to match.
route: KClass<*>? = null	the graph's unique route from a KClass
typeMap: Map<KType, NavType<*>> = emptyMap()	A mapping of KType to custom NavType<*> in the route. Only necessary if route uses custom NavTypes.
builder: NavGraphBuilder.() -> Unit	the builder used to construct the graph

createGraph

Artifact: androidx.navigation:navigation-runtime

View Source

@ExperimentalSafeArgsApi
inline fun NavHost.createGraph(
    startDestination: KClass<*>,
    route: KClass<*>? = null,
    typeMap: Map<KType, NavType<*>> = emptyMap(),
    builder: NavGraphBuilder.() -> Unit
): NavGraph

Construct a new NavGraph

Parameters
startDestination: KClass<*>	the starting destination's route from a KClass for this NavGraph. The respective NavDestination must be added as a KClass in order to match.
route: KClass<*>? = null	the graph's unique route from a KClass
typeMap: Map<KType, NavType<*>> = emptyMap()	A mapping of KType to custom NavType<*> in the route. Only necessary if route uses custom NavTypes.
builder: NavGraphBuilder.() -> Unit	the builder used to construct the graph