NavDestination

public NavDestination(@NonNull Navigator<@NonNull NavDestination> navigator)

NavDestinations should be created via Navigator.createDestination.

This constructor requires that the given Navigator has a Navigator.Name annotation.

public final void addArgument(@NonNull String argumentName, @NonNull NavArgument argument)

Sets an argument type for an argument name

public final void addDeepLink(@NonNull NavDeepLink navDeepLink)

Add a deep link to this destination. Uris that match the given NavDeepLink uri sent to NavController.handleDeepLink or NavController.navigate will trigger navigating to this destination.

In addition to a direct Uri match, the following features are supported:

Uris without a scheme are assumed as http and https. For example, www.example.com will match http://www.example.com and https://www.example.com. Placeholders in the form of {placeholder_name} matches 1 or more characters. The String value of the placeholder will be available in the arguments SavedState with a key of the same name. For example, http://www.example.com/users/{id} will match http://www.example.com/users/4. The .* wildcard can be used to match 0 or more characters.

These Uris can be declared in your navigation XML files by adding one or more <deepLink app:uri="uriPattern" /> elements as a child to your destination.

Custom actions and mimetypes are also supported by NavDeepLink and can be declared in your navigation XML files by adding <app:action="android.intent.action.SOME_ACTION" /> or <app:mimetype="type/subtype" /> as part of your deepLink declaration.

Deep link Uris, actions, and mimetypes added in navigation XML files will automatically replace instances of ${applicationId} with the applicationId of your app. Programmatically added deep links should use Context.getPackageName directly when constructing the uriPattern.

When matching deep links for calls to NavController.handleDeepLink or NavController.navigate the order of precedence is as follows: the deep link with the most matching arguments will be chosen, followed by the deep link with a matching action, followed by the best matching mimeType (e.i. when matching mimeType image/jpg: image/ * *\/jpg *\/ *).

public final void addDeepLink(@NonNull String uriPattern)

Add a deep link to this destination. Matching Uris sent to NavController.handleDeepLink or NavController.navigate will trigger navigating to this destination.

In addition to a direct Uri match, the following features are supported:

• Uris without a scheme are assumed as http and https. For example, www.example.com will match http://www.example.com and https://www.example.com.

• Placeholders in the form of {placeholder_name} matches 1 or more characters. The parsed value of the placeholder will be available in the arguments SavedState with a key of the same name. For example, http://www.example.com/users/{id} will match http://www.example.com/users/4.

• The .* wildcard can be used to match 0 or more characters.

These Uris can be declared in your navigation XML files by adding one or more <deepLink app:uri="uriPattern" /> elements as a child to your destination.

Deep links added in navigation XML files will automatically replace instances of ${applicationId} with the applicationId of your app. Programmatically added deep links should use Context.getPackageName directly when constructing the uriPattern.

public final String fillInLabel(@NonNull Context context, Bundle bundle)

Parses a dynamic label containing arguments into a String.

Supports String Resource arguments by parsing R.string values of ReferenceType arguments found in android:label into their String values.

Returns null if label is null.

Returns the original label if the label was a static string.

public final NavAction getAction(@IdRes int id)

Returns the NavAction for the given action ID. This will recursively check the getParent of this destination if the action destination is not found in this destination.

public final @NonNull Map<@NonNull String, @NonNull NavArgument> getArguments()

The arguments supported by this destination. Returns a read-only map of argument names to NavArgument objects that can be used to check the type, default value and nullability of the argument.

To add and remove arguments for this NavDestination use addArgument and removeArgument.

public static final @NonNull Sequence<@NonNull NavDestination> getHierarchy(@NonNull NavDestination receiver)

Provides a sequence of the NavDestination's hierarchy. The hierarchy starts with this destination itself and is then followed by this destination's NavDestination.parent, then that graph's parent, and up the hierarchy until you've reached the root navigation graph.

public final @IdRes int getId()

The destination's unique ID. This should be an ID resource generated by the Android resource system.

If using safe args, setting this manually will override the ID that was set based on route from KClass.

public final CharSequence getLabel()

The descriptive label of this destination.

public final @NonNull String getNavigatorName()

The name associated with this destination's Navigator.

public final NavGraph getParent()

Gets the NavGraph that contains this destination. This will be set when a destination is added to a NavGraph via NavGraph.addDestination.

public final String getRoute()

The destination's unique route. Setting this will also update the id of the destinations so custom destination ids should only be set after setting the route.

public boolean hasDeepLink(@NonNull NavUri deepLink)

Checks the given deep link NavUri, and determines whether it matches a Uri pattern added to the destination by a call to addDeepLink . It returns true if the deep link is a valid match, and false otherwise.

This should be called prior to NavController.navigate to ensure the deep link can be navigated to.

public boolean hasDeepLink(@NonNull NavDeepLinkRequest deepLinkRequest)

Checks the given NavDeepLinkRequest, and determines whether it matches a NavDeepLink added to the destination by a call to addDeepLink. It returns true if the request is a valid match, and false otherwise.

This should be called prior to NavController.navigate to ensure the deep link can be navigated to.

public static final boolean <T extends Object> hasRoute(@NonNull NavDestination receiver)

Checks if the NavDestination's route was generated from T

Returns true if equal, false otherwise.

public static final boolean <T extends Object> hasRoute(
    @NonNull NavDestination receiver,
    @NonNull KClass<@NonNull T> route
)

Checks if the NavDestination's route was generated from T

Returns true if equal, false otherwise.

@CallSuper
public void onInflate(@NonNull Context context, @NonNull AttributeSet attrs)

Called when inflating a destination from a resource.

public final void putAction(@IdRes int actionId, @NonNull NavAction action)

Sets the NavAction destination for an action ID.

public final void putAction(@IdRes int actionId, @IdRes int destId)

Creates a NavAction for the given destId and associates it with the actionId.

public final void removeAction(@IdRes int actionId)

Unsets the NavAction for an action ID.

public final void removeArgument(@NonNull String argumentName)

Unsets the argument type for an argument name.

public final void setId(int id)

The destination's unique ID. This should be an ID resource generated by the Android resource system.

If using safe args, setting this manually will override the ID that was set based on route from KClass.

public final void setLabel(CharSequence label)

The descriptive label of this destination.

public final void setParent(NavGraph parent)

Gets the NavGraph that contains this destination. This will be set when a destination is added to a NavGraph via NavGraph.addDestination.

public final void setRoute(String route)

The destination's unique route. Setting this will also update the id of the destinations so custom destination ids should only be set after setting the route.

protected static final @NonNull Class<C> <C extends Object> parseClassFromName(
    @NonNull Context context,
    @NonNull String name,
    @NonNull Class<C> expectedClassType
)

Parse the class associated with this destination from a raw name, generally extracted from the android:name attribute added to the destination's XML. This should be the class providing the visual representation of the destination that the user sees after navigating to this destination.

This method does name -> Class caching and should be strongly preferred over doing your own parsing if your Navigator supports the android:name attribute to give consistent behavior across all Navigators.