public void OnLocationChanged(Location location)
        {
            if (location.Accuracy <= desiredAccuracy)
            {
                Finish(location);
                return;
            }

            lock (locationSync)
            {
                if (GeolocationUtils.IsBetterLocation(location, bestLocation))
                {
                    bestLocation = location;
                }
            }
        }
コード例 #2
0
        /// <summary>
        /// Gets the last known and most accurate location.
        /// This is usually cached and best to display first before querying for full position.
        /// </summary>
        /// <returns>Best and most recent location or null if none found</returns>
        public async Task <Position> GetLastKnownLocationAsync()
        {
            var hasPermission = await CheckPermissions();

            if (!hasPermission)
            {
                throw new GeolocationException(GeolocationError.Unauthorized);
            }

            Location bestLocation = null;

            foreach (var provider in Providers)
            {
                var location = Manager.GetLastKnownLocation(provider);
                if (location != null && GeolocationUtils.IsBetterLocation(location, bestLocation))
                {
                    bestLocation = location;
                }
            }

            return(bestLocation?.ToPosition());
        }
        public GeolocationSingleListener(LocationManager manager, float desiredAccuracy, int timeout, IEnumerable <string> activeProviders, Action finishedCallback)
        {
            this.desiredAccuracy  = desiredAccuracy;
            this.finishedCallback = finishedCallback;

            this.activeProviders = new HashSet <string>(activeProviders);

            foreach (var provider in activeProviders)
            {
                var location = manager.GetLastKnownLocation(provider);
                if (location != null && GeolocationUtils.IsBetterLocation(location, bestLocation))
                {
                    bestLocation = location;
                }
            }


            if (timeout != Timeout.Infinite)
            {
                timer = new Timer(TimesUp, null, timeout, 0);
            }
        }