androidx.navigation.ui

Classes

AppBarConfiguration	Configuration options for `NavigationUI` methods that interact with implementations of the app bar pattern such as `androidx.appcompat.widget.Toolbar`, `com.google.android.material.appbar.CollapsingToolbarLayout`, and `androidx.appcompat.app.ActionBar`.
NavigationUI	Class which hooks up elements typically in the 'chrome' of your application such as global navigation patterns like a navigation drawer or bottom nav bar with your `NavController`.

Top-level functions summary

AppBarConfiguration	`AppBarConfiguration(navGraph: NavGraph, drawerLayout: DrawerLayout? = null, noinline fallbackOnNavigateUpListener: () -> Boolean = { false })` Configuration options for NavigationUI methods that interact with implementations of the app bar pattern such as android.support.v7.widget.Toolbar, android.support.design.widget.CollapsingToolbarLayout, and android.support.v7.app.ActionBar.
AppBarConfiguration	`AppBarConfiguration(topLevelMenu: Menu, drawerLayout: DrawerLayout? = null, noinline fallbackOnNavigateUpListener: () -> Boolean = { false })` Configuration options for NavigationUI methods that interact with implementations of the app bar pattern such as android.support.v7.widget.Toolbar, android.support.design.widget.CollapsingToolbarLayout, and android.support.v7.app.ActionBar.
AppBarConfiguration	`AppBarConfiguration(topLevelDestinationIds: Set<Int>, drawerLayout: DrawerLayout? = null, noinline fallbackOnNavigateUpListener: () -> Boolean = { false })` Configuration options for NavigationUI methods that interact with implementations of the app bar pattern such as android.support.v7.widget.Toolbar, android.support.design.widget.CollapsingToolbarLayout, and android.support.v7.app.ActionBar.

Extension functions summary

For android.view.MenuItem
Boolean	`MenuItem.onNavDestinationSelected(navController: NavController)` Attempt to navigate to the NavDestination associated with this MenuItem.

For androidx.appcompat.app.AppCompatActivity
Unit	`AppCompatActivity.setupActionBarWithNavController(navController: NavController, drawerLayout: DrawerLayout?)` Sets up the ActionBar returned by AppCompatActivity.getSupportActionBar for use with a NavController.
Unit	`AppCompatActivity.setupActionBarWithNavController(navController: NavController, configuration: AppBarConfiguration = AppBarConfiguration(navController.graph))` Sets up the ActionBar returned by AppCompatActivity.getSupportActionBar for use with a NavController.

For androidx.appcompat.widget.Toolbar
Unit	`Toolbar.setupWithNavController(navController: NavController, drawerLayout: DrawerLayout?)` Sets up a Toolbar for use with a NavController.
Unit	`Toolbar.setupWithNavController(navController: NavController, configuration: AppBarConfiguration = AppBarConfiguration(navController.graph))` Sets up a Toolbar for use with a NavController.

For com.google.android.material.appbar.CollapsingToolbarLayout
Unit	`CollapsingToolbarLayout.setupWithNavController(toolbar: Toolbar, navController: NavController, drawerLayout: DrawerLayout?)` Sets up a CollapsingToolbarLayout and Toolbar for use with a NavController.
Unit	`CollapsingToolbarLayout.setupWithNavController(toolbar: Toolbar, navController: NavController, configuration: AppBarConfiguration = AppBarConfiguration(navController.graph))` Sets up a CollapsingToolbarLayout and Toolbar for use with a NavController.

For com.google.android.material.bottomnavigation.BottomNavigationView
Unit	`BottomNavigationView.setupWithNavController(navController: NavController)` Sets up a BottomNavigationView for use with a NavController.

For com.google.android.material.navigation.NavigationView
Unit	`NavigationView.setupWithNavController(navController: NavController)` Sets up a NavigationView for use with a NavController.

For NavController
Boolean	`NavController.navigateUp(drawerLayout: DrawerLayout?)` Handles the Up button by delegating its behavior to the given NavController.
Boolean	`NavController.navigateUp(appBarConfiguration: AppBarConfiguration)` Handles the Up button by delegating its behavior to the given NavController.

Top-level functions

AppBarConfiguration

inline fun AppBarConfiguration(navGraph: NavGraph, drawerLayout: DrawerLayout? = null, noinline fallbackOnNavigateUpListener: () -> Boolean = { false }): AppBarConfiguration

Configuration options for NavigationUI methods that interact with implementations of the app bar pattern such as android.support.v7.widget.Toolbar, android.support.design.widget.CollapsingToolbarLayout, and android.support.v7.app.ActionBar.

Parameters
`navGraph`	The NavGraph whose start destination should be considered the only top level destination. The Up button will not be displayed when on the start destination of the graph.
`drawerLayout`	The DrawerLayout that should be toggled from the Navigation button. The the Navigation button will show a drawer symbol when it is not being shown as an Up button.
`fallbackOnNavigateUpListener`	Lambda that will be invoked if androidx.navigation.NavController.navigateUp returns `false`

AppBarConfiguration

inline fun AppBarConfiguration(topLevelMenu: Menu, drawerLayout: DrawerLayout? = null, noinline fallbackOnNavigateUpListener: () -> Boolean = { false }): AppBarConfiguration

Parameters
`topLevelMenu`	A Menu containing MenuItems corresponding with the destinations considered at the top level of your information hierarchy. The Up button will not be displayed when on these destinations.
`drawerLayout`	The DrawerLayout that should be toggled from the Navigation button. The the Navigation button will show a drawer symbol when it is not being shown as an Up button.
`fallbackOnNavigateUpListener`	Lambda that will be invoked if androidx.navigation.NavController.navigateUp returns `false`

AppBarConfiguration

inline fun AppBarConfiguration(topLevelDestinationIds: Set<Int>, drawerLayout: DrawerLayout? = null, noinline fallbackOnNavigateUpListener: () -> Boolean = { false }): AppBarConfiguration

Parameters
`topLevelDestinationIds`	The set of destinations by id considered at the top level of your information hierarchy. The Up button will not be displayed when on these destinations.
`drawerLayout`	The DrawerLayout that should be toggled from the Navigation button. The the Navigation button will show a drawer symbol when it is not being shown as an Up button.
`fallbackOnNavigateUpListener`	Lambda that will be invoked if androidx.navigation.NavController.navigateUp returns `false`

Extension functions

navigateUp

fun NavController.navigateUp(drawerLayout: DrawerLayout?): Boolean

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

This is equivalent to calling NavController.navigateUp if the DrawerLayout is null.

Return
True if the NavController was able to navigate up.

navigateUp

fun NavController.navigateUp(appBarConfiguration: AppBarConfiguration): Boolean

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

Return
True if the NavController was able to navigate up.

onNavDestinationSelected

fun MenuItem.onNavDestinationSelected(navController: NavController): Boolean

Attempt to navigate to the NavDestination associated with this MenuItem.

Importantly, it assumes the menu item id matches a valid action id or destination id to be navigated to.

By default, the back stack will be popped back to the navigation graph's start destination. Menu items that have android:menuCategory="secondary" will not pop the back stack.

Return
True if the NavController was able to navigate to the destination.

setupActionBarWithNavController

fun AppCompatActivity.setupActionBarWithNavController(navController: NavController, drawerLayout: DrawerLayout?): Unit

Sets up the ActionBar returned by AppCompatActivity.getSupportActionBar for use with a NavController.

By calling this method, the title in the action bar will automatically be updated when the destination changes (assuming there is a valid label).

The start destination of your navigation graph is considered the only top level destination. On the start destination of your navigation graph, the ActionBar will show the drawer icon if the given drawerLayout is non null. On all other destinations, the ActionBar will show the Up button.

You are responsible for calling NavController.navigateUp to handle the Navigation button. Typically this is done in AppCompatActivity.onSupportNavigateUp.

Parameters
`navController`	The NavController whose navigation actions will be reflected in the title of the action bar.
`drawerLayout`	The DrawerLayout that should be toggled from the Navigation button

setupActionBarWithNavController

fun AppCompatActivity.setupActionBarWithNavController(navController: NavController, configuration: AppBarConfiguration = AppBarConfiguration(navController.graph)): Unit

Sets up the ActionBar returned by AppCompatActivity.getSupportActionBar for use with a NavController.

By calling this method, the title in the action bar will automatically be updated when the destination changes (assuming there is a valid label).

The AppBarConfiguration you provide controls how the Navigation button is displayed.

You are responsible for calling NavController.navigateUp to handle the Navigation button. Typically this is done in AppCompatActivity.onSupportNavigateUp.

Parameters
`navController`	The NavController whose navigation actions will be reflected in the title of the action bar.
`configuration`	Additional configuration options for customizing the behavior of the ActionBar

setupWithNavController

fun Toolbar.setupWithNavController(navController: NavController, drawerLayout: DrawerLayout?): Unit

Sets up a Toolbar for use with a NavController.

By calling this method, the title in the Toolbar will automatically be updated when the destination changes (assuming there is a valid label).

The start destination of your navigation graph is considered the only top level destination. On the start destination of your navigation graph, the Toolbar will show the drawer icon if the given drawerLayout is non null. On all other destinations, the Toolbar will show the Up button.

This method will call NavController.navigateUp when the navigation icon is clicked.

Parameters
`navController`	The NavController whose navigation actions will be reflected in the title of the Toolbar.
`drawerLayout`	The DrawerLayout that should be toggled from the Navigation button

setupWithNavController

fun Toolbar.setupWithNavController(navController: NavController, configuration: AppBarConfiguration = AppBarConfiguration(navController.graph)): Unit

Sets up a Toolbar for use with a NavController.

By calling this method, the title in the Toolbar will automatically be updated when the destination changes (assuming there is a valid label).

The AppBarConfiguration you provide controls how the Navigation button is displayed and what action is triggered when the Navigation button is tapped.

This method will call NavController.navigateUp when the navigation icon is clicked.

Parameters
`navController`	The NavController whose navigation actions will be reflected in the title of the Toolbar.
`configuration`	Additional configuration options for customizing the behavior of the Toolbar

setupWithNavController

fun CollapsingToolbarLayout.setupWithNavController(toolbar: Toolbar, navController: NavController, drawerLayout: DrawerLayout?): Unit

Sets up a CollapsingToolbarLayout and Toolbar for use with a NavController.

By calling this method, the title in the Toolbar will automatically be updated when the destination changes (assuming there is a valid label).

This method will call NavController.navigateUp when the Navigation button is clicked.

Parameters
`toolbar`	The Toolbar that should be kept in sync with changes to the NavController.
`navController`	The NavController whose navigation actions will be reflected in the title of the Toolbar.
`drawerLayout`	The DrawerLayout that should be toggled from the Navigation button

setupWithNavController

fun CollapsingToolbarLayout.setupWithNavController(toolbar: Toolbar, navController: NavController, configuration: AppBarConfiguration = AppBarConfiguration(navController.graph)): Unit

Sets up a CollapsingToolbarLayout and Toolbar for use with a NavController.

By calling this method, the title in the Toolbar will automatically be updated when the destination changes (assuming there is a valid label).

The AppBarConfiguration you provide controls how the Navigation button is displayed and what action is triggered when the Navigation button is tapped.

This method will call NavController.navigateUp when the navigation icon is clicked.

Parameters
`toolbar`	The Toolbar that should be kept in sync with changes to the NavController.
`navController`	The NavController whose navigation actions will be reflected in the title of the Toolbar.
`configuration`	Additional configuration options for customizing the behavior of the Toolbar

setupWithNavController

fun BottomNavigationView.setupWithNavController(navController: NavController): Unit

Sets up a BottomNavigationView for use with a NavController. This will call android.view.MenuItem.onNavDestinationSelected when a menu item is selected.

The selected item in the NavigationView will automatically be updated when the destination changes.

setupWithNavController

fun NavigationView.setupWithNavController(navController: NavController): Unit

Sets up a NavigationView for use with a NavController. This will call android.view.MenuItem.onNavDestinationSelected when a menu item is selected.

The selected item in the NavigationView will automatically be updated when the destination changes.