Mapbox
interface MapboxNavigationObserver
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Defines an object that needs to interact with or observe MapboxNavigation. Use the MapboxNavigationApp singleton to register and unregister observers with MapboxNavigationApp.registerObserver and MapboxNavigationApp.unregisterObserver.
Example of observing locations with a view model
class MyViewModel : ViewModel() {
private val locationObserver = MyLocationObserver()
val location: LiveData<Location> = locationObserver.location.asLiveData()
init {
MapboxNavigationApp.register(locationObserver)
}
override fun onCleared() {
MapboxNavigationApp.unregister(locationObserver)
}
}
class MyLocationObserver : MapboxNavigationObserver {
private val mutableLocation = MutableStateFlow<LocationMatcherResult?>(null)
val locationFlow: Flow<LocationMatcherResult?> = mutableLocation
private val locationObserver = object : LocationObserver {
override fun onNewLocationMatcherResult(locationMatcherResult: LocationMatcherResult) {
mutableLocation.value = locationMatcherResult
}
override fun onNewRawLocation(rawLocation: Location) {
// no op
}
}
override fun onAttached(mapboxNavigation: MapboxNavigation) {
mapboxNavigation.registerLocationObserver(locationObserver)
}
override fun onDetached(mapboxNavigation: MapboxNavigation) {
mapboxNavigation.unregisterLocationObserver(locationObserver)
}
}