public void StopListening()
{
if (_listener == null)
return;
_listener.PositionChanged -= OnPositionChanged;
_listener.PositionError -= OnPositionError;
_listener.OrientationChanged -= OnHeadingChanged;
for (int i = 0; i < _providers.Length; ++i)
{
_locManager.RemoveUpdates(_listener);
}
_listener = null;
// Save last known position for later
if (this._lastPosition != null)
{
Settings.Current.AddOrUpdateValue(Settings.LastKnownPositionLatitudeKey, this._lastPosition.Latitude);
Settings.Current.AddOrUpdateValue(Settings.LastKnownPositionLongitudeKey, this._lastPosition.Longitude);
Settings.Current.AddOrUpdateValue(Settings.LastKnownPositionAltitudeKey, this._lastPosition.Altitude);
}
}
public void StartListening(uint minTime, double minDistance, bool includeHeading)
{
// Get last known position from settings
_lastPosition = _lastPosition ?? new Position();
_lastPosition.Latitude = Settings.Current.GetValueOrDefault<double>(Settings.LastKnownPositionLatitudeKey);
_lastPosition.Longitude = Settings.Current.GetValueOrDefault<double>(Settings.LastKnownPositionLongitudeKey);
_lastPosition.Altitude = Settings.Current.GetValueOrDefault<double>(Settings.LastKnownPositionAltitudeKey);
if (minTime < 0)
throw new ArgumentOutOfRangeException("minTime");
if (minDistance < 0)
throw new ArgumentOutOfRangeException("minDistance");
if (IsListening)
{
return;
}
_listener = new GeolocationListener(_locManager, TimeSpan.FromMilliseconds(minTime), _providers);
_listener.PositionChanged += OnPositionChanged;
_listener.PositionError += OnPositionError;
Looper looper = Looper.MyLooper() ?? Looper.MainLooper;
for (int i = 0; i < _providers.Length; ++i)
_locManager.RequestLocationUpdates(_providers[i], minTime, (float) minDistance, _listener, looper);
// Add orientation event listener
if (includeHeading) {
_listener.OrientationChanged += OnHeadingChanged;
_orientationSensor = _sensorManager.GetDefaultSensor(SensorType.Orientation);
_accelerometerSensor = _sensorManager.GetDefaultSensor(SensorType.Accelerometer);
_sensorManager.RegisterListener(_listener, _orientationSensor, SensorDelay.Ui);
_sensorManager.RegisterListener(_listener, _accelerometerSensor, SensorDelay.Ui);
}
}