public void SetFence()
{
bool isWithinRadius = false;
foreach (var fence in fences)
{
float[] results = new float[1];
Location.DistanceBetween(fence.Latitude, fence.Longitude, currentLatitude, currentLongitude, results);
float distanceInMeters = results[0];
if (distanceInMeters < radiusInMeters)
{
isWithinRadius = true;
break;
}
}
if (!isWithinRadius)
{
var intent = new Intent(CustomActions.TODO_WITHIN_PROXIMITY);
PendingIntent pendingIntent = PendingIntent.GetService(this, 0, intent,
PendingIntentFlags.UpdateCurrent);
_locationManager.AddProximityAlert(currentLatitude, currentLongitude,
radiusInMeters, -1, pendingIntent);
}
}
public LocationNotification ScheduleLocationNotification(LocationNotification locationNotification)
{
try
{
Intent intent = new Intent(Android.App.Application.Context, typeof(NotificationSender));
intent.PutExtra("ID", locationNotification.Id);
intent.PutExtra("Title", locationNotification.Title);
intent.PutExtra("Body", locationNotification.Body);
intent.PutExtra("Type", "LocationNotification");
var latitude = locationNotification.Position.Latitude;
var longitude = locationNotification.Position.Longitude;
var radius = locationNotification.Radius;
PendingIntent broadcast = PendingIntent.GetBroadcast(Android.App.Application.Context,
locationNotification.Id,
intent,
PendingIntentFlags.UpdateCurrent);
LocationManager locationManager = (LocationManager)Android.App.Application.Context.GetSystemService(LocationService);
locationManager.AddProximityAlert(latitude, longitude, radius, -1, broadcast);
return(locationNotification);
}
catch (Exception)
{
return(null);
}
}
//Add proximity alerts:
public void addProximityAlert(double latitude, double longitude, String l)
{
Intent intent = new Intent(l);
PendingIntent proximityIntent = PendingIntent.GetBroadcast(this, 0, intent, 0);
locationManager.AddProximityAlert(latitude, longitude, 403, -1, proximityIntent);
IntentFilter filter = new IntentFilter(l);
RegisterReceiver(new ProximityIntentReceiver(this, l), filter);
}
public void AddProximityAlert(String name, double latitude, double longitude, float range)
{
Log.Info("Vegas", "Adding Location: " + name);
Intent intent = new Intent(ACTION_FILTER);
intent.PutExtra("Name", name);
PendingIntent proximityIntent = PendingIntent.GetBroadcast(this, 0, intent, PendingIntentFlags.UpdateCurrent);
locationManager.AddProximityAlert(latitude, longitude, range, 10000, proximityIntent);
}
// Get lattitude and longitude of current location
// http://developer.xamarin.com/recipes/android/os_device_resources/gps/get_current_device_location/
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.Main);
locationText = FindViewById <TextView> (Resource.Id.locationText);
radiusText = FindViewById <TextView> (Resource.Id.radiusText);
distanceText = FindViewById <TextView> (Resource.Id.distanceText);
var button = FindViewById <Button> (Resource.Id.button);
// Initialize location manager
InitializeLocationManager();
locationManager = (LocationManager)GetSystemService(LocationService);
// Pass the specified destination and radius to program by clicking button
button.Click += (sender, e) => {
// Use Geocoder to get longitude and lattitude for destination
// http://developer.xamarin.com/recipes/android/os_device_resources/geocoder/geocode_an_address/
var geo = new Geocoder(this);
var addresses = geo.GetFromLocationName(locationText.Text, 1);
Address endLocation = addresses.ToList().FirstOrDefault();
double endLat = endLocation.Latitude;
double endLon = endLocation.Longitude;
double radius = Convert.ToDouble(radiusText.Text) * 1609.34; // in meters
float radius_meters = (float)radius;
destination = new Location(locationProvider);
destination.Latitude = endLat;
destination.Longitude = endLon;
locationManager.RequestLocationUpdates(locationProvider, 0, 0, this);
Intent intent = new Intent(PROX_ALERT_INTENT);
PendingIntent proximityIntent = PendingIntent.GetBroadcast(this, 0, intent, 0);
locationManager.AddProximityAlert(endLat, endLon, radius_meters, -1, proximityIntent);
IntentFilter filter = new IntentFilter(PROX_ALERT_INTENT);
RegisterReceiver(new ProximityIntentReceiver(), filter);
/*
*
* // Calculate the distance between current address and the input address
* // http://androidapi.xamarin.com/index.aspx?link=M%3AAndroid.Locations.Location.DistanceBetween(System.Double%2CSystem.Double%2CSystem.Double%2CSystem.Double%2CSystem.Single%5B%5D)
*
* float[] list = new float[1];
*
* Location.DistanceBetween(currentLat, currentLon, endLat, endLon, list);
*
* // Show distance between current address and destination in the text field
*
* distance = list[0]/1000;
* double distance_round = Math.Round(Convert.ToDouble(distance), 3);
* distanceText.Text = distance_round.ToString();
*
* // Console.WriteLine ("distance: " + distance);
*
* // Alert if the distance is smaller than the specified radius
*
* if (distance_round <= Convert.ToDouble(radiusText.Text))
* {
* // if choose screen alert
* // alert(sender, e);
*
* // use notification
* // http://developer.xamarin.com/guides/cross-platform/application_fundamentals/notifications/android/local_notifications_in_android/
*
* // instantiate the builder and set notification elements
* Notification.Builder builder = new Notification.Builder(this)
* .SetAutoCancel(true)
* .SetContentTitle("Alert")
* .SetContentText("You are within " + radiusText.Text + " km to your destination")
* .SetDefaults(NotificationDefaults.Sound)
* .SetSmallIcon(Resource.Drawable.logo);
*
* // build the notification
* Notification notification = builder.Build();
*
* // get the notification manager
* NotificationManager notificationManager = GetSystemService (Context.NotificationService) as NotificationManager;
*
* // publish the notification
* const int notificationId = 0;
* notificationManager.Notify(notificationId, notification);
*
* } */
};
}
