PositionChanged event in GeoCoordinateWatcher in WP7

Question

I'm using GeoCoordinateWatcher to detect the logitude and latitude in windows phone 7

I did the following

 GeoCoordinateWatcher watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.Default);
  // Add event handlers for StatusChanged and PositionChanged events
        watcher.StatusChanged += new EventHandler<GeoPositionStatusChangedEventArgs>(watcher_StatusChanged);
        watcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged);
        watcher.MovementThreshold = 100;

        // Create A Timer for Getting the GPS Cooradinate every 10 seconds only
        System.Windows.Threading.DispatcherTimer dt = new System.Windows.Threading.DispatcherTimer();

        // Start the Location service in the First time when the  Application run
        StartLocationService();
        // 15 minutes the interval of timer
        dt.Interval = new TimeSpan(0, 0, 0, 10, 0);

        // Add the Tick Method for event Handler
        dt.Tick += new EventHandler(Start_Service);

        // Start the Timer
        dt.Start();
    }

in start_service method I'm calling watcher.start

The problem is that watcher_PositionChanged is called every 10 seconds even if the location didn't change !!! and I knew that

watcher.MovementThreshold = 100;

will watcher_PositionChanged method be called when the traveled distance is 100 or more But this didn't happen

NOTE: I'm testing my code using emulator

Igor Kulman · Accepted Answer · 2012-09-17 09:29:09Z

2

If I understand it correctly you start the geowatcher every 10 seconds again so every 10 seconds it is restarted and yields the actual coordinates.

If you want to call a method every 10 seconds only when the position has changed, you can have a currentCoordinates and lastCoordinates value. You write the currentCoordinates with each PositionChanged event and every 10 seconds test if it differs from lastCoordinates. or better, you can use Reactive Extensions to combine events.

answered Sep 17, 2012 at 9:29

Igor Kulman

16.4k10 gold badges59 silver badges120 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Developer Over a year ago

but I'm setting watcher.MovementThreshold and I change my position and the positionChanged event is not fired

Collectives™ on Stack Overflow

PositionChanged event in GeoCoordinateWatcher in WP7

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related