Navigation

object Navigation


Entry point for navigation operations.

This class provides utilities for finding a relevant NavController instance from various common places in your application, or for performing navigation in response to UI events.

Summary

Public functions

View.OnClickListener

Create an android.view.View.OnClickListener for navigating to a destination.

View.OnClickListener

Create an android.view.View.OnClickListener for navigating to a destination via a generated NavDirections.

NavController
findNavController(activity: Activity, @IdRes viewId: Int)

Find a NavController given the id of a View and its containing Activity.

NavController

Find a NavController given a local View.

Unit
setViewNavController(view: View, controller: NavController?)

Associates a NavController with the given View, allowing developers to use findNavController and findNavController with that View or any of its children to retrieve the NavController.

Public functions

createNavigateOnClickListener

fun createNavigateOnClickListener(@IdRes resId: Int, args: Bundle? = null): View.OnClickListener

Create an android.view.View.OnClickListener for navigating to a destination. This supports both navigating via an action and directly navigating to a destination.

Parameters
@IdRes resId: Int

an action id or a destination id to navigate to when the view is clicked

args: Bundle? = null

arguments to pass to the final destination

Returns
View.OnClickListener

a new click listener for setting on an arbitrary view

createNavigateOnClickListener

fun createNavigateOnClickListener(directions: NavDirections): View.OnClickListener

Create an android.view.View.OnClickListener for navigating to a destination via a generated NavDirections.

Parameters
directions: NavDirections

directions that describe this navigation operation

Returns
View.OnClickListener

a new click listener for setting on an arbitrary view

findNavController

fun findNavController(activity: Activity, @IdRes viewId: Int): NavController

Find a NavController given the id of a View and its containing Activity. This is a convenience wrapper around findNavController.

This method will locate the NavController associated with this view. This is automatically populated for the id of a NavHost and its children.

Parameters
activity: Activity

The Activity hosting the view

@IdRes viewId: Int

The id of the view to search from

Returns
NavController

the NavController associated with the view referenced by id

Throws
kotlin.IllegalStateException

if the given viewId does not correspond with a NavHost or is not within a NavHost.

findNavController

fun findNavController(view: View): NavController

Find a NavController given a local View.

This method will locate the NavController associated with this view. This is automatically populated for views that are managed by a NavHost and is intended for use by various listener interfaces.

Parameters
view: View

the view to search from

Returns
NavController

the locally scoped NavController to the given view

Throws
kotlin.IllegalStateException

if the given view does not correspond with a NavHost or is not within a NavHost.

setViewNavController

fun setViewNavController(view: View, controller: NavController?): Unit

Associates a NavController with the given View, allowing developers to use findNavController and findNavController with that View or any of its children to retrieve the NavController.

This is generally called for you by the hosting NavHost.

Parameters
view: View

View that should be associated with the given NavController

controller: NavController?

The controller you wish to later retrieve via findNavController