Navigation events | Navigation SDK UX Framework | Android Docs

Navigation SDK UX Framework exposes the set of the NavigationEvents to observe transitions between navigation states.

There are Navigation Events which can be observed from UX Framework:

OnFreeDrive. The event is fired when the navigation system switches to the FreeDrive state or when it is in the FreeDrive state during the subscription.
OnNavigationStart. The event is fired when navigation starts.
OnNavigationCancel. The event is fired when navigation is canceled from any state except final destination Arrival.
OnNavigationEnd. The event is fired when navigation has ended after arriving at the final destination.
OnOffRoute. The event is fired when navigation system detects off-route.
OnWaypointArrival. The event is fired when navigation arrives at an intermediate waypoint..
OnWaypointPass. The event is fired when an intermediate waypoint is passed, and navigation continues to the next waypoint.
OnDestinationArrival. The event is fired when navigation arrives at the final destination..

The host application can observe the Navigation Event changes through the Dash.controller instance.

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        lifecycleScope.launch {
            repeatOnLifecycle(Lifecycle.State.STARTED) {
                Dash.controller.observeNavigationEvents()
                    .collect { /* NavigationEvent */ event ->
                        // Do something with the NavigationEvent
                        processNavigationEvents(event)
                    }
            }
        }
    }

    fun processNavigationEvents(event: NavigationEvent) {
        when (event) {
            is NavigationEvent.OnFreeDrive ->
                Toast.makeText(
                    this,
                    "App switched to the FreeDrive mode",
                    Toast.LENGTH_SHORT
                ).show()
            is NavigationEvent.OnNavigationStart ->
                Toast.makeText(
                    this,
                    "Navigation was started",
                    Toast.LENGTH_SHORT
                ).show()
            is NavigationEvent.OnNavigationCancel ->
                Toast.makeText(
                    this,
                    "Navigation was cancelled before the arrival to the destination point",
                    Toast.LENGTH_SHORT
                ).show()
            is NavigationEvent.OnNavigationEnd ->
                Toast.makeText(
                    this,
                    "Navigation was ended because of the arrival to the destination point",
                    Toast.LENGTH_SHORT
                ).show()
            is NavigationEvent.OnOffRoute ->
                Toast.makeText(
                    this,
                    "You are off-route",
                    Toast.LENGTH_SHORT
                ).show()
            is NavigationEvent.OnWaypointArrival ->
                Toast.makeText(
                    this,
                    "You are arrived to the intermediate waypoint",
                    Toast.LENGTH_SHORT
                ).show()
            is NavigationEvent.OnWaypointPass ->
                Toast.makeText(
                    this,
                    "Moving to the next waypoint",
                    Toast.LENGTH_SHORT
                ).show()
            is NavigationEvent.OnDestinationArrival ->
                Toast.makeText(
                    this,
                    "Arriving to the final destination",
                    Toast.LENGTH_SHORT
                ).show()
        }
    }
}

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