NavController

public class NavController

Known direct subclasses
NavHostController

Subclass of NavController that offers additional APIs for use by a NavHost to connect the NavController to external dependencies.
Known indirect subclasses
TestNavHostController

Subclass of NavHostController that offers additional APIs for testing Navigation.

NavController manages app navigation within a NavHost.

Apps will generally obtain a controller directly from a host, or by using one of the utility methods on the Navigation class rather than create a controller directly.

Navigation flows and destinations are determined by the navigation graph owned by the controller. These graphs are typically navInflater from an Android resource, but, like views, they can also be constructed or combined programmatically or for the case of dynamic navigation structure. (For example, if the navigation structure of the application is determined by live data obtained' from a remote server.)

Summary

Nested types

OnDestinationChangedListener receives a callback when the currentDestination or its arguments change.

Constants
static final @NonNull String

The Intent that triggered a deep link to the current destination.

Public constructors

Public methods
void

Adds an OnDestinationChangedListener to this controller to receive a callback whenever the currentDestination or its arguments change.
final boolean

Clears any saved state associated with KClass T that was previously saved via popBackStack when using a saveState value of true.
final boolean
@MainThread
clearBackStack(@IdRes int destinationId)

Clears any saved state associated with destinationId that was previously saved via popBackStack when using a saveState value of true.
final boolean

Clears any saved state associated with KClass route that was previously saved via popBackStack when using a saveState value of true.
final boolean
@MainThread
<T extends Object> clearBackStack(@NonNull T route)

Clears any saved state associated with KClass T that was previously saved via popBackStack when using a saveState value of true.
final boolean

Clears any saved state associated with route that was previously saved via popBackStack when using a saveState value of true.
@NonNull NavDeepLinkBuilder

Create a deep link to a destination within this NavController.
static final void

By default, handleDeepLink will automatically add calls to NavOptions.Builder.setPopUpTo with a saveState of true when the deep link takes you to another graph (e.g., a different navigation graph than the one your start destination is in).
final @NonNull NavBackStackEntry
<T extends Object> getBackStackEntry()

Gets the topmost NavBackStackEntry for a route from KClass.
@NonNull NavBackStackEntry
getBackStackEntry(@IdRes int destinationId)

Gets the topmost NavBackStackEntry for a destination id.
final @NonNull NavBackStackEntry
<T extends Object> getBackStackEntry(@NonNull KClass<@NonNull T> route)

Gets the topmost NavBackStackEntry for a route from KClass.
final @NonNull NavBackStackEntry
<T extends Object> getBackStackEntry(@NonNull T route)

Gets the topmost NavBackStackEntry for a route from an Object.
final @NonNull NavBackStackEntry

Gets the topmost NavBackStackEntry for a route.
NavBackStackEntry

The topmost NavBackStackEntry.
final @NonNull Flow<@NonNull NavBackStackEntry>

A Flow that will emit the currently active NavBackStackEntry whenever it changes.
NavDestination

The current destination.
@NonNull NavGraph

The topmost navigation graph associated with this NavController.
@NonNull NavInflater

The inflater for this controller.
@NonNull NavigatorProvider

The NavController's NavigatorProvider.
NavBackStackEntry

The previous visible NavBackStackEntry.
@NonNull ViewModelStoreOwner
getViewModelStoreOwner(@IdRes int navGraphId)

Gets the ViewModelStoreOwner for a NavGraph.
final @NonNull StateFlow<@NonNull List<@NonNull NavBackStackEntry>>

A StateFlow that will emit the currently visible NavBackStackEntries whenever they change.
boolean

Checks the given Intent for a Navigation deep link and navigates to the deep link if present.
final boolean

Checks the given NavDeepLinkRequest for a Navigation deep link and navigates to the destination if present.
void

Navigate to a destination via the given deep link Uri.
void

Navigate via the given NavDirections
void

Navigate to a destination via the given NavDeepLinkRequest.
void

Navigate to a destination from the current navigation graph.
void
@MainThread
navigate(@NonNull NavUri deepLink, NavOptions navOptions)

Navigate to a destination via the given deep link Uri.
void
@MainThread
navigate(@NonNull NavDirections directions, NavOptions navOptions)

Navigate via the given NavDirections
void
@MainThread
navigate(
    @NonNull NavDirections directions,
    @NonNull Navigator.Extras navigatorExtras
)

Navigate via the given NavDirections
void

Navigate to a destination via the given NavDeepLinkRequest.
void
@MainThread
navigate(@IdRes int resId, Bundle args)

Navigate to a destination from the current navigation graph.
final void
@MainThread
<T extends Object> navigate(
    @NonNull T route,
    @ExtensionFunctionType @NonNull Function1<@NonNull NavOptionsBuilder, Unit> builder
)

Navigate to a route from an Object in the current NavGraph.
final void
@MainThread
navigate(
    @NonNull String route,
    @ExtensionFunctionType @NonNull Function1<@NonNull NavOptionsBuilder, Unit> builder
)

Navigate to a route in the current NavGraph.
void
@MainThread
navigate(
    @NonNull NavUri deepLink,
    NavOptions navOptions,
    Navigator.Extras navigatorExtras
)

Navigate to a destination via the given deep link Uri.
void
@MainThread
navigate(
    @NonNull NavDeepLinkRequest request,
    NavOptions navOptions,
    Navigator.Extras navigatorExtras
)

Navigate to a destination via the given NavDeepLinkRequest.
void
@MainThread
navigate(@IdRes int resId, Bundle args, NavOptions navOptions)

Navigate to a destination from the current navigation graph.
final void
@MainThread
<T extends Object> navigate(
    @NonNull T route,
    NavOptions navOptions,
    Navigator.Extras navigatorExtras
)

Navigate to a route from an Object in the current NavGraph.
final void
@MainThread
navigate(
    @NonNull String route,
    NavOptions navOptions,
    Navigator.Extras navigatorExtras
)

Navigate to a route in the current NavGraph.
void
@MainThread
navigate(
    @IdRes int resId,
    Bundle args,
    NavOptions navOptions,
    Navigator.Extras navigatorExtras
)

Navigate to a destination from the current navigation graph.
boolean

Attempts to navigate up in the navigation hierarchy.
boolean

Attempts to pop the controller's back stack.
boolean
@MainThread
popBackStack(@IdRes int destinationId, boolean inclusive)

Attempts to pop the controller's back stack back to a specific destination.
final boolean
@MainThread
<T extends Object> popBackStack(boolean inclusive, boolean saveState)

Attempts to pop the controller's back stack back to a specific destination.
boolean
@MainThread
popBackStack(
    @IdRes int destinationId,
    boolean inclusive,
    boolean saveState
)

Attempts to pop the controller's back stack back to a specific destination.
final boolean
@MainThread
<T extends Object> popBackStack(
    @NonNull KClass<@NonNull T> route,
    boolean inclusive,
    boolean saveState
)

Attempts to pop the controller's back stack back to a specific destination.
final boolean
@MainThread
<T extends Object> popBackStack(
    @NonNull T route,
    boolean inclusive,
    boolean saveState
)

Attempts to pop the controller's back stack back to a specific destination.
final boolean
@MainThread
popBackStack(@NonNull String route, boolean inclusive, boolean saveState)

Attempts to pop the controller's back stack back to a specific destination.
void

Removes an OnDestinationChangedListener from this controller.
void

Restores all navigation controller state from a SavedState.
SavedState

Saves all navigation controller state to a SavedState.
void

The topmost navigation graph associated with this NavController.
void

Sets the navigation graph to the specified resource.
void
@MainThread
@CallSuper
setGraph(@NonNull NavGraph graph, SavedState startDestinationArgs)

Sets the navigation graph to the specified graph.
void
@MainThread
@CallSuper
setGraph(@NavigationRes int graphResId, Bundle startDestinationArgs)

Sets the navigation graph to the specified resource.

Extension functions
final @NonNull NavGraph
NavControllerKt.createGraph(
    @NonNull NavController receiver,
    @IdRes int id,
    @IdRes int startDestination,
    @ExtensionFunctionType @NonNull Function1<@NonNull NavGraphBuilder, Unit> builder
)

This method is deprecated. Use routes to create your NavGraph instead
final @NonNull NavGraph
NavControllerKt.createGraph(
    @NonNull NavController receiver,
    @IdRes int id,
    @IdRes int startDestination,
    @ExtensionFunctionType @NonNull Function1<@NonNull DynamicNavGraphBuilder, Unit> builder
)

This method is deprecated. Use routes to create your dynamic NavGraph instead
final @NonNull NavGraph
NavControllerKt.createGraph(
    @NonNull NavController receiver,
    @NonNull String startDestination,
    String route,
    @ExtensionFunctionType @NonNull Function1<@NonNull NavGraphBuilder, Unit> builder
)

Construct a new NavGraph
final @NonNull NavGraph
NavControllerKt.createGraph(
    @NonNull NavController receiver,
    @NonNull String startDestination,
    String route,
    @ExtensionFunctionType @NonNull Function1<@NonNull DynamicNavGraphBuilder, Unit> builder
)

Construct a new androidx.navigation.NavGraph that supports dynamic navigation destinations
final @NonNull NavGraph
NavControllerKt.createGraph(
    @NonNull NavController receiver,
    @NonNull Object startDestination,
    KClass<@NonNull ?> route,
    @NonNull Map<@NonNull KType, @NonNull NavType<@NonNull ?>> typeMap,
    @ExtensionFunctionType @NonNull Function1<@NonNull NavGraphBuilder, Unit> builder
)

Construct a new NavGraph
final @NonNull NavGraph
NavControllerKt.createGraph(
    @NonNull NavController receiver,
    @NonNull Object startDestination,
    KClass<@NonNull ?> route,
    @NonNull Map<@NonNull KType, @NonNull NavType<@NonNull ?>> typeMap,
    @ExtensionFunctionType @NonNull Function1<@NonNull DynamicNavGraphBuilder, Unit> builder
)

Construct a new androidx.navigation.NavGraph that supports dynamic navigation destinations
final @NonNull NavGraph
NavControllerKt.createGraph(
    @NonNull NavController receiver,
    @NonNull KClass<@NonNull ?> startDestination,
    KClass<@NonNull ?> route,
    @NonNull Map<@NonNull KType, @NonNull NavType<@NonNull ?>> typeMap,
    @ExtensionFunctionType @NonNull Function1<@NonNull NavGraphBuilder, Unit> builder
)

Construct a new NavGraph
final @NonNull NavGraph
NavControllerKt.createGraph(
    @NonNull NavController receiver,
    @NonNull KClass<@NonNull ?> startDestination,
    KClass<@NonNull ?> route,
    @NonNull Map<@NonNull KType, @NonNull NavType<@NonNull ?>> typeMap,
    @ExtensionFunctionType @NonNull Function1<@NonNull DynamicNavGraphBuilder, Unit> builder
)

Construct a new androidx.navigation.NavGraph that supports dynamic navigation destinations
final boolean
NavControllerKt.navigateUp(
    @NonNull NavController receiver,
    @NonNull AppBarConfiguration appBarConfiguration
)

Handles the Up button by delegating its behavior to the given NavController.
final boolean
NavControllerKt.navigateUp(
    @NonNull NavController receiver,
    Openable drawerLayout
)

Handles the Up button by delegating its behavior to the given NavController.

Constants

public static final @NonNull String KEY_DEEP_LINK_INTENT

The Intent that triggered a deep link to the current destination.

Public constructors

public NavController()
Added in 1.0.0
public NavController(@NonNull Context context)

Public methods

addOnDestinationChangedListener

Added in 1.0.0
public void addOnDestinationChangedListener(
    @NonNull NavController.OnDestinationChangedListener listener
)

Adds an OnDestinationChangedListener to this controller to receive a callback whenever the currentDestination or its arguments change.

The current destination, if any, will be immediately sent to your listener.

Parameters
@NonNull NavController.OnDestinationChangedListener listener

the listener to receive events

clearBackStack

@MainThread
public final boolean <T extends Object> clearBackStack()

Clears any saved state associated with KClass T that was previously saved via popBackStack when using a saveState value of true.

Parameters
<T extends Object>

The route from the KClass of the destination previously used with popBackStack with a saveStatevalue of true. The target NavDestination must have been created with route from KClass.
Returns
boolean

true if the saved state of the stack associated with T was cleared.

clearBackStack

Added in 2.4.0
@MainThread
public final boolean clearBackStack(@IdRes int destinationId)

Clears any saved state associated with destinationId that was previously saved via popBackStack when using a saveState value of true.

Parameters
@IdRes int destinationId

The ID of the destination previously used with popBackStack with a saveStatevalue of true
Returns
boolean

true if the saved state of the stack associated with destinationId was cleared.

clearBackStack

Added in 2.9.0-alpha09
@MainThread
public final boolean <T extends Object> clearBackStack(@NonNull KClass<@NonNull T> route)

Clears any saved state associated with KClass route that was previously saved via popBackStack when using a saveState value of true.

Parameters
@NonNull KClass<@NonNull T> route

The route from the KClass of the destination previously used with popBackStack with a saveStatevalue of true. The target NavDestination must have been created with route from KClass.
Returns
boolean

true if the saved state of the stack associated with route was cleared.

clearBackStack

Added in 2.8.0
@MainThread
public final boolean <T extends Object> clearBackStack(@NonNull T route)

Clears any saved state associated with KClass T that was previously saved via popBackStack when using a saveState value of true.

Parameters
@NonNull T route

The route from an Object of the destination previously used with popBackStack with a saveStatevalue of true. The target NavDestination must have been created with route from KClass.
Returns
boolean

true if the saved state of the stack associated with T was cleared.

clearBackStack

Added in 2.4.0
@MainThread
public final boolean clearBackStack(@NonNull String route)

Clears any saved state associated with route that was previously saved via popBackStack when using a saveState value of true.

Parameters
@NonNull String route

The route of the destination previously used with popBackStack with a saveState value of true. May contain filled in arguments as long as it is exact match with route used with popBackStack.
Returns
boolean

true if the saved state of the stack associated with route was cleared.

createDeepLink

Added in 1.0.0
public @NonNull NavDeepLinkBuilder createDeepLink()

Create a deep link to a destination within this NavController.

Returns
@NonNull NavDeepLinkBuilder

a NavDeepLinkBuilder suitable for constructing a deep link

enableDeepLinkSaveState

Added in 2.4.0
@NavDeepLinkSaveStateControl
public static final void enableDeepLinkSaveState(boolean saveState)

By default, handleDeepLink will automatically add calls to NavOptions.Builder.setPopUpTo with a saveState of true when the deep link takes you to another graph (e.g., a different navigation graph than the one your start destination is in).

You can disable this behavior by passing false for saveState.

getBackStackEntry

public final @NonNull NavBackStackEntry <T extends Object> getBackStackEntry()

Gets the topmost NavBackStackEntry for a route from KClass.

This is always safe to use with the current destination or its parent or grandparent navigation graphs as these destinations are guaranteed to be on the back stack.

Parameters
<T extends Object>

route from the KClass of a destination that exists on the back stack. The target NavBackStackEntry's NavDestination must have been created with route from KClass.
Throws
kotlin.IllegalArgumentException

if the destination is not on the back stack

getBackStackEntry

Added in 2.2.0
public @NonNull NavBackStackEntry getBackStackEntry(@IdRes int destinationId)

Gets the topmost NavBackStackEntry for a destination id.

This is always safe to use with the current destination or its parent or grandparent navigation graphs as these destinations are guaranteed to be on the back stack.

Parameters
@IdRes int destinationId

ID of a destination that exists on the back stack
Throws
kotlin.IllegalArgumentException

if the destination is not on the back stack

getBackStackEntry

Added in 2.9.0-alpha09
public final @NonNull NavBackStackEntry <T extends Object> getBackStackEntry(@NonNull KClass<@NonNull T> route)

Gets the topmost NavBackStackEntry for a route from KClass.

This is always safe to use with the current destination or its parent or grandparent navigation graphs as these destinations are guaranteed to be on the back stack.

Parameters
@NonNull KClass<@NonNull T> route

route from the KClass of destination T that exists on the back stack. The target NavBackStackEntry's NavDestination must have been created with route from KClass.
Throws
kotlin.IllegalArgumentException

if the destination is not on the back stack

getBackStackEntry

Added in 2.8.0
public final @NonNull NavBackStackEntry <T extends Object> getBackStackEntry(@NonNull T route)

Gets the topmost NavBackStackEntry for a route from an Object.

This is always safe to use with the current destination or its parent or grandparent navigation graphs as these destinations are guaranteed to be on the back stack.

Parameters
@NonNull T route

route from an Object of a destination that exists on the back stack. The target NavBackStackEntry's NavDestination must have been created with route from KClass.
Throws
kotlin.IllegalArgumentException

if the destination is not on the back stack

getBackStackEntry

Added in 2.4.0
public final @NonNull NavBackStackEntry getBackStackEntry(@NonNull String route)

Gets the topmost NavBackStackEntry for a route.

This is always safe to use with the current destination or its parent or grandparent navigation graphs as these destinations are guaranteed to be on the back stack.

Parameters
@NonNull String route

route of a destination that exists on the back stack. May contain filled in arguments as long as it is exact match with route used to navigate.
Throws
kotlin.IllegalArgumentException

if the destination is not on the back stack

getCurrentBackStackEntry

Added in 2.3.0
public NavBackStackEntry getCurrentBackStackEntry()

The topmost NavBackStackEntry.

Returns
NavBackStackEntry

the topmost entry on the back stack or null if the back stack is empty

getCurrentBackStackEntryFlow

Added in 2.4.0
public final @NonNull Flow<@NonNull NavBackStackEntry> getCurrentBackStackEntryFlow()

A Flow that will emit the currently active NavBackStackEntry whenever it changes. If there is no active NavBackStackEntry, no item will be emitted.

getCurrentDestination

Added in 1.0.0
public NavDestination getCurrentDestination()

The current destination.

getGraph

Added in 1.0.0
@MainThread
public @NonNull NavGraph getGraph()

The topmost navigation graph associated with this NavController.

When this is set any current navigation graph data (including back stack) will be replaced.

Throws
kotlin.IllegalStateException

if called before setGraph().
See also
setGraph

getNavInflater

Added in 1.0.0
public @NonNull NavInflater getNavInflater()

The inflater for this controller.

Returns
@NonNull NavInflater

inflater for loading navigation resources

getNavigatorProvider

Added in 1.0.0
public @NonNull NavigatorProvider getNavigatorProvider()

The NavController's NavigatorProvider. All Navigators used to construct the navigation graph for this nav controller should be added to this navigator provider before the graph is constructed.

This can only be set before the graph is set via setGraph().

Generally, the Navigators are set for you by the NavHost hosting this NavController and you do not need to manually interact with the navigator provider.

Throws
kotlin.IllegalStateException

If this set called after setGraph()

getPreviousBackStackEntry

Added in 2.3.0
public NavBackStackEntry getPreviousBackStackEntry()

The previous visible NavBackStackEntry.

This skips over any NavBackStackEntry that is associated with a NavGraph.

Returns
NavBackStackEntry

the previous visible entry on the back stack or null if the back stack has less than two visible entries

getViewModelStoreOwner

Added in 2.1.0
public @NonNull ViewModelStoreOwner getViewModelStoreOwner(@IdRes int navGraphId)

Gets the ViewModelStoreOwner for a NavGraph. This can be passed to androidx.lifecycle.ViewModelProvider to retrieve a ViewModel that is scoped to the navigation graph - it will be cleared when the navigation graph is popped off the back stack.

Parameters
@IdRes int navGraphId

ID of a NavGraph that exists on the back stack
Throws
kotlin.IllegalStateException

if called before the NavHost has called NavHostController.setViewModelStore.
kotlin.IllegalArgumentException

if the NavGraph is not on the back stack

getVisibleEntries

Added in 2.4.0
public final @NonNull StateFlow<@NonNull List<@NonNull NavBackStackEntry>> getVisibleEntries()

A StateFlow that will emit the currently visible NavBackStackEntries whenever they change. If there is no visible NavBackStackEntry, this will be set to an empty list.

  • CREATED entries are listed first and include all entries that are in the process of completing their exit transition. Note that this can include entries that have been popped off the Navigation back stack.

  • STARTED entries on the back stack are next and include all entries that are running their enter transition and entries whose destination is partially covered by a FloatingWindow destination

  • The last entry in the list is the topmost entry in the back stack and is in the RESUMED state only if its enter transition has completed. Otherwise it too will be STARTED.

Note that the Lifecycle of any entry cannot be higher than the containing Activity/Fragment - if the Activity is not RESUMED, no entry will be RESUMED, no matter what the transition state is.

handleDeepLink

Added in 1.0.0
@MainThread
public boolean handleDeepLink(Intent intent)

Checks the given Intent for a Navigation deep link and navigates to the deep link if present. This is called automatically for you the first time you set the graph if you've passed in an Activity as the context when constructing this NavController, but should be manually called if your Activity receives new Intents in Activity.onNewIntent.

The types of Intents that are supported include:

Intents created by NavDeepLinkBuilder or createDeepLink. This assumes that the current graph shares the same hierarchy to get to the deep linked destination as when the deep link was constructed. Intents that include a data Uri. This Uri will be checked against the Uri patterns in the NavDeepLinks added via NavDestination.addDeepLink.

The navigation graph should be set before calling this method.

Parameters
Intent intent

The Intent that may contain a valid deep link
Returns
boolean

True if the navigation controller found a valid deep link and navigated to it.
Throws
kotlin.IllegalStateException

if deep link cannot be accessed from the current destination
See also
addDeepLink