ComposeNavigator

Artifact: androidx.navigation:navigation-compose

View Source

Added in 2.4.0

@Navigator.Name(value = "composable")
class ComposeNavigator : Navigator

kotlin.Any
↳	androidx.navigation.Navigator
	↳	androidx.navigation.compose.ComposeNavigator

---

Navigator that navigates through Composables. Every destination using this Navigator must set a valid Composable by setting it directly on an instantiated Destination or calling composable.

Summary

Nested types
@NavDestination.ClassType(value = Composable) class ComposeNavigator.Destination : NavDestination NavDestination specific to ComposeNavigator

Public constructors
ComposeNavigator()

Public functions
open ComposeNavigator.Destination	createDestination() Construct a new NavDestination associated with this Navigator.
open Unit	navigate(     entries: List<NavBackStackEntry>,     navOptions: NavOptions?,     navigatorExtras: Navigator.Extras? ) Navigate to a destination.
Unit	onTransitionComplete(entry: NavBackStackEntry) Callback to mark a navigation in transition as complete.
open Unit	popBackStack(popUpTo: NavBackStackEntry, savedState: Boolean) Attempt to pop this navigator's back stack, performing the appropriate navigation.
Unit	prepareForTransition(entry: NavBackStackEntry) Function to prepare the entry for transition.

Public properties
StateFlow<List<NavBackStackEntry>>	backStack Get the back stack from the state.

Inherited functions

From androidx.navigation.Navigator open NavDestination? navigate(     destination: ComposeNavigator.Destination,     args: SavedState?,     navOptions: NavOptions?,     navigatorExtras: Navigator.Extras? ) Navigate to a destination. open Unit @CallSuper onAttach(state: NavigatorState) Indicator that this Navigator is actively being used by a NavController. open Unit onLaunchSingleTop(backStackEntry: NavBackStackEntry) Informational callback indicating that the given backStackEntry has been affected by a NavOptions.shouldLaunchSingleTop operation. open Unit onRestoreState(savedState: SavedState) Restore any state previously saved in onSaveState. open SavedState? onSaveState() Called to ask for a SavedState representing the Navigator's state. open Boolean popBackStack() Attempt to pop this navigator's back stack, performing the appropriate navigation.

Inherited properties
From androidx.navigation.Navigator Boolean isAttached Whether this Navigator is actively being used by a NavController. NavigatorState state The state of the Navigator is the communication conduit between the Navigator and the NavController that has called onAttach.

Public constructors

ComposeNavigator

Added in 2.4.0

ComposeNavigator()

Public functions

createDestination

Added in 2.4.0

open fun createDestination(): ComposeNavigator.Destination

Construct a new NavDestination associated with this Navigator.

Any initialization of the destination should be done in the destination's constructor as it is not guaranteed that every destination will be created through this method.

Returns
ComposeNavigator.Destination	a new NavDestination

navigate

open fun navigate(
    entries: List<NavBackStackEntry>,
    navOptions: NavOptions?,
    navigatorExtras: Navigator.Extras?
): Unit

Navigate to a destination.

Requests navigation to a given destination associated with this navigator in the navigation graph. This method generally should not be called directly; NavController will delegate to it when appropriate.

Parameters
entries: List<NavBackStackEntry>	destination(s) to navigate to
navOptions: NavOptions?	additional options for navigation
navigatorExtras: Navigator.Extras?	extras unique to your Navigator.

onTransitionComplete

Added in 2.6.0

fun onTransitionComplete(entry: NavBackStackEntry): Unit

Callback to mark a navigation in transition as complete.

This should be called in conjunction with navigate and popBackStack as those calls merely start a transition to the target destination, and requires manually marking the transition as complete by calling this method.

Failing to call this method could result in entries being prevented from reaching their final Lifecycle.State.

popBackStack

open fun popBackStack(popUpTo: NavBackStackEntry, savedState: Boolean): Unit

Attempt to pop this navigator's back stack, performing the appropriate navigation.

All destinations back to popUpTo should be popped off the back stack.

Parameters
popUpTo: NavBackStackEntry	the entry that should be popped off the NavigatorState.backStack along with all entries above this entry.
savedState: Boolean	whether any Navigator specific state associated with popUpTo should be saved to later be restored by a call to navigate with NavOptions.shouldRestoreState.

prepareForTransition

Added in 2.8.0

fun prepareForTransition(entry: NavBackStackEntry): Unit

Function to prepare the entry for transition.

This should be called when the entry needs to move the Lifecycle.State in preparation for a transition such as when using predictive back.

Public properties

backStack

Added in 2.6.0

val backStack: StateFlow<List<NavBackStackEntry>>

Get the back stack from the state.