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Per ottenere le migliori prestazioni con Fleet Engine, fornisci un flusso di aggiornamenti della posizione del veicolo. Utilizza uno dei seguenti modi per fornire questi aggiornamenti:
Utilizza l'SDK Driver: l'opzione più semplice. Consulta la documentazione di Driver SDK per Android o iOS.
Utilizza il codice personalizzato: utile se le posizioni vengono trasmesse tramite il backend o se utilizzi dispositivi diversi da Android o iOS. Questa guida illustra
questo approccio.
Se non utilizzi Driver SDK per aggiornare la posizione del veicolo, puoi effettuare una chiamata diretta a Fleet Engine con la posizione del veicolo. Per qualsiasi veicolo attivo,
Fleet Engine prevede un aggiornamento della posizione almeno una volta al minuto e al massimo
una volta ogni 5 secondi. Questi aggiornamenti richiedono solo i privilegi di Utente SDK driver di Fleet Engine.
Esempio di aggiornamento della posizione del veicolo
Java
staticfinalStringPROJECT_ID="project-id";staticfinalStringVEHICLE_ID="vid-8241890";VehicleServiceBlockingStubvehicleService=VehicleService.newBlockingStub(channel);StringvehicleName="providers/"+PROJECT_ID+"/vehicles/"+VEHICLE_ID;VehicleupdatedVehicle=Vehicle.newBuilder().setLastLocation(VehicleLocation.newBuilder().setSupplementalLocation(LatLng.newBuilder().setLatitude(37.3382).setLongitude(121.8863)).setSupplementalLocationTime(now()).setSupplementalLocationSensor(LocationSensor.CUSTOMER_SUPPLIED_LOCATION).setSupplementalLocationAccuracy(DoubleValue.of(15.0)))// Optional.build();UpdateVehicleRequestupdateVehicleRequest=UpdateVehicleRequest.newBuilder().setName(vehicleName).setVehicle(updatedVehicle).setUpdateMask(FieldMask.newBuilder().addPaths("last_location")).build();try{VehicleupdatedVehicle=vehicleService.updateVehicle(updateVehicleRequest);}catch(StatusRuntimeExceptione){Statuss=e.getStatus();switch(s.getCode()){caseNOT_FOUND:// Most implementations will call CreateVehicle in this casebreak;casePERMISSION_DENIED:break;}return;}// If no Exception, Vehicle updated successfully.
[null,null,["Ultimo aggiornamento 2025-09-05 UTC."],[[["\u003cp\u003eFleet Engine requires frequent vehicle location updates for optimal performance, achievable through the Driver SDK or custom code.\u003c/p\u003e\n"],["\u003cp\u003eThe Driver SDK is the simplest method for location updates, with dedicated documentation for Android and iOS.\u003c/p\u003e\n"],["\u003cp\u003eFor custom solutions, direct calls to Fleet Engine can be made with location data, requiring updates every 5 seconds to 1 minute.\u003c/p\u003e\n"],["\u003cp\u003eVehicles can be updated using REST or client libraries, with code examples provided for both Java and REST.\u003c/p\u003e\n"]]],[],null,["# Update a vehicle location\n\n| **Note:** **Before constructing a vehicle request** , read the requirements under [Vehicle requests](/maps/documentation/mobility/fleet-engine/essentials/vehicles#vehicle_requests) in the Introduction.\n\nFor the best performance with Fleet Engine, provide it with a stream of vehicle\nlocation updates. Use either of the following ways to provide these updates:\n\n1. **Use the Driver SDK** : simplest option. See the Driver SDK documentation for [Android](/maps/documentation/mobility/driver-sdk/on-demand/android/minimum-requirements) or [iOS](//maps/documentation/mobility/driver-sdk/on-demand/ios/minimum-requirements).\n2. **Use custom code**: useful if locations are relayed through your backend, or if you use devices other than Android or iOS. This guide covers that approach.\n\nIf not using the Driver SDK to update the vehicle's location, you can make a\ndirect call to Fleet Engine with the vehicle's location. For any active vehicle,\nFleet Engine expects a location update at least once every minute and at most\nonce every 5 seconds. These updates require only *Fleet Engine Driver SDK User*\nprivileges.\n\nUpdate vehicle location example\n-------------------------------\n\n### Java\n\n static final String PROJECT_ID = \"\u003cvar translate=\"no\"\u003eproject-id\u003c/var\u003e\";\n static final String VEHICLE_ID = \"\u003cvar translate=\"no\"\u003evid-8241890\u003c/var\u003e\";\n\n VehicleServiceBlockingStub vehicleService = VehicleService.newBlockingStub(channel);\n\n String vehicleName = \"providers/\" + PROJECT_ID + \"/vehicles/\" + VEHICLE_ID;\n Vehicle updatedVehicle = Vehicle.newBuilder()\n .setLastLocation(VehicleLocation.newBuilder()\n .setSupplementalLocation(LatLng.newBuilder()\n .setLatitude(37.3382)\n .setLongitude(121.8863))\n .setSupplementalLocationTime(now())\n .setSupplementalLocationSensor(LocationSensor.CUSTOMER_SUPPLIED_LOCATION)\n .setSupplementalLocationAccuracy(DoubleValue.of(15.0))) // Optional\n .build();\n\n UpdateVehicleRequest updateVehicleRequest = UpdateVehicleRequest.newBuilder()\n .setName(vehicleName)\n .setVehicle(updatedVehicle)\n .setUpdateMask(FieldMask.newBuilder()\n .addPaths(\"last_location\"))\n .build();\n\n try {\n Vehicle updatedVehicle =\n vehicleService.updateVehicle(updateVehicleRequest);\n } catch (StatusRuntimeException e) {\n Status s = e.getStatus();\n switch (s.getCode()) {\n case NOT_FOUND:\n // Most implementations will call CreateVehicle in this case\n break;\n case PERMISSION_DENIED:\n break;\n }\n return;\n }\n // If no Exception, Vehicle updated successfully.\n\n### REST\n\n curl -X PUT \\\n \"https://fleetengine.googleapis.com/v1/providers/\u003cvar translate=\"no\"\u003eproject-id\u003c/var\u003e/vehicles/\u003cvar translate=\"no\"\u003evid-8241890\u003c/var\u003e?updateMask=last_location\" \\\n -H \"Authorization: Bearer $JWT\" \\\n -H \"Content-Type: application/json\" \\\n --data-binary @- \u003c\u003c EOM\n {\n \"supplementalLocation\": {\"latitude\": 12.1, \"longitude\": 14.5},\n \"supplementalLocationTime\": \"$(date -u --iso-8601=seconds)\",\n \"supplementalLocationSensor\": \"CUSTOMER_SUPPLIED_LOCATION\",\n \"supplementalLocationAccuracy\": 15\n }\n EOM\n\nSee [providers.vehicles.update](/maps/documentation/mobility/fleet-engine/reference/trips/rest/v1/providers.vehicles/update) reference.\n\nWhat's next\n-----------\n\n- [Get a vehicle](/maps/documentation/mobility/fleet-engine/essentials/vehicles/on-demand-get-vehicle)"]]