Get the vehicle ready

Set up listeners

After initializing the Driver SDK and creating a GMTDDeliveryDriverAPI instance, you can set up event listeners to monitor the success or failure of vehicle updates sent to Fleet Engine and your backend. These listeners can trigger actions within your driver app, such as notifying the driver if communication with your backend fails.

Listen for vehicle update events

When the driver enables location updates in the driver app, the Driver SDK sends regular vehicle updates to Fleet Engine and the customer backend through the GMTDDeliveryVehicleReporter class. You can have the app respond to update events by setting up the GMTDVehicleReporterListener protocol.

With GMTDVehicleReporterListener, you can handle the following events:

• vehicleReporter:didSucceedVehicleUpdate

  Informs the Driver app that the backend services successfully received the vehicle location and state update.

• vehicleReporter:didFailVehicleUpdate:withError

  Informs the listener that a vehicle update failed. As long as the driver has location updates enabled, the GMTDDeliveryVehicleReporter class continues to send the latest data to Fleet Engine.

The following example shows how to set up GMTDVehicleReporterListener to handle these events:

Swift

import GoogleRidesharingDriver

private let providerID = "INSERT_YOUR_PROVIDER_ID"

class SampleViewController: UIViewController, GMTDVehicleReporterListener {
  private let mapView: GMSMapView

  override func viewDidLoad() {
    // Assumes you have implemented the sample code up to this step.
    deliveryDriverAPI.vehicleReporter.add(self)
  }

  func vehicleReporter(_ vehicleReporter: GMTDDeliveryVehicleReporter, didSucceed vehicleUpdate: GMTDVehicleUpdate) {
    // Handle update succeeded.
  }

  func vehicleReporter(_ vehicleReporter: GMTDDeliveryVehicleReporter, didFail vehicleUpdate: GMTDVehicleUpdate, withError error: Error) {
    // Handle update failed.
  }
}

Objective-C

SampleViewController.h
@interface SampleViewController : UIViewController<GMTDVehicleReporterListener>
@end

SampleViewController.m
#import "SampleViewController.h"
#import "SampleAccessTokenProvider.h"
#import <GoogleRidesharingDriver/GoogleRidesharingDriver.h>

static NSString *const PROVIDER_ID = @"INSERT_YOUR_PROVIDER_ID";

@implementation SampleViewController {
 GMSMapView *_mapView;
}

- (void)viewDidLoad {
  // ASSUMES YOU IMPLEMENTED HAVE THE SAMPLE CODE UP TO THIS STEP.
  [delivervehicleReporter addListener:self];
}

- (void)vehicleReporter:(GMTDDeliveryVehicleReporter *)vehicleReporter didSucceedVehicleUpdate:(GMTDVehicleUpdate *)vehicleUpdate {
  // Handle update succeeded.
}

- (void)vehicleReporter:(GMTDDeliveryVehicleReporter *)vehicleReporter didFailVehicleUpdate:(GMTDVehicleUpdate *)vehicleUpdate withError:(NSError *)error {
  // Handle update failed.
}

@end

Enable location updates

To enable location updates, in the driver app on GMTDDeliveryVehicleReporter, set locationTrackingEnabled to YES. Then the GMTDDeliveryVehicleReporter class automatically sends location updates to Fleet Engine. Additionally, when the GMSNavigator is in navigation mode, which is when a destination is set through setDestinations, the GMTDDeliveryVehicleReporter class automatically sends route and ETA updates.

The Driver SDK sets the route to match the driver's current navigation path. To ensure accurate location updates, set the waypoint in -setDestinations:callback: to match the destination in Fleet Engine.

The following example shows how to enable location updates:

Swift

import GoogleRidesharingDriver

private let providerID = "INSERT_YOUR_PROVIDER_ID"

class SampleViewController: UIViewController, GMTDVehicleReporterListener {
  private let mapView: GMSMapView

  override func viewDidLoad() {
    // Assumes you have implemented the sample code up to this step.
    deliveryDriverAPI.vehicleReporter.locationTrackingEnabled = true
  }
}

Objective-C

SampleViewController.m
#import "SampleViewController.h"
#import "SampleAccessTokenProvider.h"
#import <GoogleRidesharingDriver/GoogleRidesharingDriver.h>

static NSString *const PROVIDER_ID = @"INSERT_YOUR_PROVIDER_ID";

@implementation SampleViewController {
 GMSMapView *_mapView;
}

- (void)viewDidLoad {
  // ASSUMES YOU HAVE IMPLEMENTED THE SAMPLE CODE UP TO THIS STEP.
  deliveryDriverAPI.vehicleReporter.locationTrackingEnabled = YES;
}

@end

Note: If the device has not moved since the last location update, the GMSRoadSnappedLocationProvider class does not send location updates continuously. For example, if a driver is waiting idle in the car. If you want to send a new location update, and have set GMTDDeliveryVehicleReporter as a listener after calling startUpdatingLocation on GMSRoadSnappedLocationProvider, you need to stop and start GMSRoadSnappedLocationProvider.

(Optional) Set the update interval

By default, when you set locationTrackingEnabled to YES, the Driver SDK sends location updates to Fleet Engine at a 10-second interval. You can change the update interval with locationUpdateInterval to a minimum update interval of 5 seconds or a maximum of 60 seconds. More frequent updates may result in slower requests and errors.