Route progress

SDKs covered:

Navigation SDK

Navigation UI SDK

Tracking a user's progress along a route is key to providing helpful and prompt navigation instructions. The RouteProgress class contains all the user's progress information along the route, including legs and steps. This object is provided inside ProgressChangeListener, allowing you to get distance measurements, the percentage of route complete, current step index, and much more.

Listening to progress change

Like tracking user location changes, the ProgressChangeListener is invoked every time the user's location changes and provides an updated RouteProgress object. The Navigation UI SDK uses this listener by default, but if you are not using the Navigation UI SDK, it is strongly encouraged that you also use this listener. The ProgressChangeListener can typically be used to refresh most of your application's user interface when a change occurs. For example, if you are displaying the user's current progress until the user needs to do the next maneuver. Every time this listener's invoked, you can update your view with the new information from RouteProgress.

Besides receiving information about the route progress, the callback also provides you with the user's current location, which can provide their current speed, bearing, etc. If you have the snap-to-route enabled, the location object will be updated to give the snapped coordinates.

Java

Kotlin

navigation.addProgressChangeListener(new ProgressChangeListener() {
@Override
public void onProgressChange(Location location, RouteProgress routeProgress) {
 
}
});

Information about progress

There are three classes that contain information on route progress at different levels of granularity: route, leg, and step.

Route: The blue line is a route. A route stretches between the origin and destination.

Leg: The larger circles with a pink stroke represent waypoints, or stops, along the route. A leg is the part of the route between two waypoints.

Step: The smaller circles with a green stroke represent maneuvers. A step is the part of the leg between two maneuvers.

RouteProgress

This class contains all progress information at any given time during a navigation session. This progress includes information for the current route, leg and step the user is traversing along. With every new valid location update, a new route progress will be generated using the latest information.

RouteProgress APIs	Description
directionsRoute	The route acquired from the directions API and being used for navigation.
distanceTraveled	The total distance the user has traveled along the route.
legIndex	The route's current leg index that the user's on.
currentLeg	The route's current leg as a `routeLeg` object.
distanceRemaining	Provides the distance remaining in meters till the user reaches the end of the route.
durationRemaining	The estimated duration remaining till the user arrives at their destination.
fractionTraveled	A `float` value between 0 and 1 giving the total percentage the user has completed in the navigation session, based on distance.
currentLegProgress	returns the `LegProgress` object with information specific to the current route leg. You can also access step information through this object.
remainingWaypoints	Number of waypoints remaining on the current route.
currentStepPoints	List of `Point`s representing the current step geometry.
upcomingStepPoints	List of `Point`s representing the upcoming step geometry.
voiceInstruction	The current `VoiceInstruction` for the given segment along the route.
currentState	`RouteStateProgress` is the current state of route initialization and location tracking along the route.

RouteLegProgress

This is a progress object specific to the current leg the user is on. If there is only one leg in the directions route, much of this information will be the same as the parent RouteProgress.

RouteLegProgress APIs	Description
currentStepProgress	returns the `stepProgress` object with information specific to the current route step.
stepIndex	The route's current step index the user's on.
distanceTraveled	Total distance the user has traveled along the current leg.
durationRemaining	The estimated duration remaining till the user reaches the last maneuver in current route leg.
fractionTraveled	A `float` value between 0 and 1 giving the total percentage the user has traveled along the current route leg, based on distance.
distanceRemaining	The total distance the user has traveled along the current leg.
previousStep	Get the previous step the user traversed along, if the user is still on the first step, this will return null.
currentStep	Returns the current step the user is traversing along. Should be used to provide voice / banner instructions.
upComingStep	Get the next/upcoming step after the current step. If the user is on the last step on the last leg, this will return null since a next step doesn't exist.
currentLegAnnotation	Provides the current annotation data that the `Location` updates are traveling along. Note: the `DirectionsRoute` must be requested with `ANNOTATION_DISTANCE` to enable this within the RouteProgress - this by default in `NavigationRoute`.

RouteStepProgress

This is a progress object specific to the current step the user is on.

RouteStepProgress APIs	Description
distanceTraveled	Total distance the user has traveled along the current step.
durationRemaining	The estimated duration remaining till the user reaches the next step maneuver.
fractionTraveled	A `float` value between 0 and 1 giving the total percentage the user has traveled along the current step.
distanceRemaining	The total distance the user has traveled along the current step.
currentIntersection	An intersection is considered a current intersection once passed through and will stay so until a different intersection is passed through.
upcomingIntersection	The intersection being traveled towards on the route. Will be null if the upcoming step is null (last step of the leg).

Using NavigationView in your XML gives you the ability to listen to different updates or events that may occur during navigation. Both the ProgressChangeListener (see above) and MilestoneEventListener (see the Maneuver instructions guide) from our core SDK are able to be added, as well as RouteListener.

Note

This listeners is only available if you are adding NavigationView to your Activity or Fragment layout XML via NavigationViewOptions. You are not able to add them to NavigationLauncherOptions.

RouteListener

Callback	Description
`allowRerouteFrom(Point offRoutePoint)`	Will trigger in an off-route scenario: Given the `Point` the user has gone off-route, this listener can return true or false. Returning true will allow the SDK to proceed with the re-route process and fetch a new route with this given off-route `Point`. Returning false will stop the re-route process and the user will continue without a new route in the direction they are traveling.
`onOffRoute(Point offRoutePoint)`	Will trigger only if `RouteListener#allowRerouteFrom(Point)` returns true. This serves as the official off-route event and will continue the process to fetch a new route with the given off-route `Point`.
`onRerouteAlong(DirectionsRoute directionsRoute)`	Will trigger when a new `DirectionsRoute` has been retrieved post off-route. This is the new route the user will be following until another off route event is triggered.
`onFailedReroute(String errorMessage)`	Will trigger if the request for a new `DirectionsRoute` fails. Provides the error message from the directions API used to retrieve the `DirectionsRoute`.