void StartLocationUpdates() { if (locationUpdatesStarted) { return; } else { locationUpdatesStarted = true; } if (indoorManager != null) { Log.Debug("app", "indoorManager already initialized, starting position updates"); indoorManager.StartPositioning(); return; } // starting with Android 8.0, the most reliable way to keep // Bluetooth scanning active when the user leaves the app is through // a foreground service, and for that to work we're required to show // a notification that informs the user about the activity // // read more about it on: // https://developer.android.com/guide/components/services.html#Foreground var channelId = "indoor_location"; if (Build.VERSION.SdkInt >= BuildVersionCodes.O) { // Android 8.0 and up require a channel for the notifications var channel = new NotificationChannel(channelId, "Bluetooth activity", NotificationImportance.Low); var notificationManager = this.GetSystemService(Context.NotificationService) as NotificationManager; notificationManager.CreateNotificationChannel(channel); } var notification = new NotificationCompat.Builder(this, channelId) .SetSmallIcon(global::Android.Resource.Drawable.IcDialogInfo) .SetContentTitle("Indoor Location") .SetContentText("Indoor Location updates are running") .Build(); var creds = new EstimoteCloudCredentials(APP_ID, APP_TOKEN); var getLocationHandler = new GetLocationHandler(); getLocationHandler.GetLocationSuccess += (location) => { Log.Debug("app", $"Successfully fetched location from Estimote Cloud: {location}"); Log.Debug("app", "Initializing indoorManager and starting position updates"); locationView.SetLocation(location); indoorManager = new IndoorLocationManagerBuilder(this, location, creds) // see the longer comment above about the foreground service and // the notification // // if you only intend to use beacons while the app is open, you // can safely remove this line .WithScannerInForegroundService(notification) .Build(); indoorManager.SetOnPositionUpdateListener(new PositionUpdateHandler(locationView)); indoorManager.StartPositioning(); }; getLocationHandler.GetLocationFailure += (error) => { Log.Error("app", $"Failed to fetch the location from Estimote Cloud: {error}"); }; Log.Debug("app", $"Fetching location '{LOCATION_ID}' from Estimote Cloud..."); new IndoorCloudManagerFactory() .Create(this, creds) .GetLocation(LOCATION_ID, getLocationHandler); }
protected override async Task StartListeningAsync() { await base.StartListeningAsync(); Notification notification = (SensusContext.Current.Notifier as AndroidNotifier).CreateNotificationBuilder(AndroidNotifier.SensusNotificationChannel.ForegroundService) .SetSmallIcon(Resource.Drawable.notification_icon_background) .SetContentTitle("Beacon Scan") .SetContentText("Scanning...") .SetOngoing(true) .Build(); if (Beacons.Count > 0) { _proximityObserver = new ProximityObserverBuilder(Application.Context, new Estimote.Android.Proximity.EstimoteCloudCredentials(EstimoteCloudAppId, EstimoteCloudAppToken)) .WithBalancedPowerMode() .WithScannerInForegroundService(notification) .OnError(new ProximityErrorHandler()) .Build(); List <IProximityZone> zones = new List <IProximityZone>(); foreach (EstimoteBeacon beacon in Beacons) { IProximityZone zone = new ProximityZoneBuilder() .ForTag(beacon.Tag) .InCustomRange(beacon.ProximityMeters) .OnEnter(new ProximityHandler(this, beacon, EstimoteBeaconProximityEvent.Entered)) .OnExit(new ProximityHandler(this, beacon, EstimoteBeaconProximityEvent.Exited)) .Build(); zones.Add(zone); } _proximityObservationHandler = _proximityObserver.StartObserving(zones); } if (Location != null) { Estimote.Android.Indoor.EstimoteCloudCredentials credentials = new Estimote.Android.Indoor.EstimoteCloudCredentials(EstimoteCloudAppId, EstimoteCloudAppToken); IIndoorCloudManager indoorCloudManager = new IndoorCloudManagerFactory().Create(Application.Context, credentials); AndroidEstimoteIndoorCloudCallback cloudCallback = new AndroidEstimoteIndoorCloudCallback(); indoorCloudManager.GetLocation(Location.Identifier, cloudCallback); Estimote.Android.Indoor.Location cloudLocation = await cloudCallback.GetValueAsync(); _indoorLocationManager = new IndoorLocationManagerBuilder(Application.Context, cloudLocation, credentials) .WithPositionUpdateInterval(IndoorLocationUpdateIntervalMS) .WithOnErrorAction(new IndoorErrorHandler()) .WithScannerInForegroundService(notification) .Build(); AndroidEstimoteIndoorPositionUpdateListener indoorPositionUpdateListener = new AndroidEstimoteIndoorPositionUpdateListener(); indoorPositionUpdateListener.UpdatedPositionAsync += async(estimoteLocation) => { EstimoteIndoorLocationDatum datum = null; if (estimoteLocation != null) { datum = new EstimoteIndoorLocationDatum(DateTimeOffset.UtcNow, estimoteLocation.GetX(), estimoteLocation.GetY(), estimoteLocation.Orientation, EstimoteIndoorLocationAccuracy.Unknown, Location.Name, Location.Identifier, cloudLocation, estimoteLocation); } await StoreDatumAsync(datum); }; _indoorLocationManager.SetOnPositionUpdateListener(indoorPositionUpdateListener); _indoorLocationManager.StartPositioning(); } }