void doOnLocationUpdated(Location location)
{
this.TimeUpdated = DateTime.Now;
this.Location = location;
this.FailureInfo = "";
if (this.Location != null)
{
LocationServicesStatus = LocationServicesStatusEnum.Ok;
}
this.fireEvents();
}
void requestLocationAsync(bool askPermissionIfNecessary)
{
// is not authorized?
if (CoreLocation.CLLocationManager.Status == CLAuthorizationStatus.Restricted ||
CoreLocation.CLLocationManager.Status == CLAuthorizationStatus.Denied)
{
Task.Run(() =>
{
Location = null; // location is not known
LocationServicesStatus = LocationServicesStatusEnum.NotAuthorized;
FailureInfo = "Not authorized to use location services";
fireEvents();
});
return;
}
// initialize
initLocationManager();
// request permission
if (UIDevice.CurrentDevice.CheckSystemVersion(8, 0) == true &&
CoreLocation.CLLocationManager.Status == CLAuthorizationStatus.NotDetermined)
{
if (askPermissionIfNecessary == false)
{
return; // don't do anything if the caller doesn't want to ask for permission
}
locationManager.AuthorizationChanged += (s, e) =>
{
if (e.Status == CLAuthorizationStatus.NotDetermined)
{
return; // in progress
}
if (e.Status == CLAuthorizationStatus.Authorized || e.Status == CLAuthorizationStatus.AuthorizedAlways || e.Status == CLAuthorizationStatus.AuthorizedWhenInUse)
{
LocationServicesStatus = LocationServicesStatusEnum.Ok;
this.tryCheckingNow();
}
else
{
Location = null; // location is not known
LocationServicesStatus = LocationServicesStatusEnum.NotAuthorized;
FailureInfo = "Permission to use use location services not given";
fireEvents();
}
};
locationManager.RequestWhenInUseAuthorization();
return;
}
// check location
this.tryCheckingNow();
}
void tryCheckingNow()
{
if (CLLocationManager.LocationServicesEnabled == false)
{
Location = null; // location is not known
LocationServicesStatus = LocationServicesStatusEnum.NotAuthorized;
FailureInfo = "Not authorized to use location services (2)";
fireEvents();
return;
}
DateTime timeStarted = DateTime.Now;
Task.Run(async() =>
{
for (; ;)
{
await Task.Delay(100);
if (TimeUpdated != null && TimeUpdated.Value >= timeStarted)
{
// stop listening
// note: events had already been fired
locationManager.StopUpdatingLocation();
return;
}
if (TimeUpdated != null && (DateTime.Now - TimeUpdated.Value).TotalMinutes < 5 && Location != null)
{
// location already known. no need to wait.
fireEvents();
return;
}
if ((DateTime.Now - timeStarted).TotalSeconds > 5)
{
FailureInfo = "Timeout";
fireEvents();
return;
}
}
});
// start listening
locationManager.StartUpdatingLocation();
}
//
// ILocationListener
//
public void OnLocationChanged(Android.Locations.Location location)
{
this.TimeLocationUpdated = DateTime.Now;
this.Location = new Location()
{
Latitude = location.Latitude, Longitude = location.Longitude
};
this.LocationServicesStatus = LocationServicesStatusEnum.Ok;
Console.WriteLine("OnLocationChanged: " +
location.Provider.ToString() + " " +
this.Location.Latitude.ToString() + " " +
this.Location.Longitude.ToString());
this.fireEvents();
try
{
locationManager.RemoveUpdates(this);
}
catch (Exception) {
}
}
public LocationService_Android()
{
LocationServicesStatus = LocationServicesStatusEnum.Unknown;
}
public LocationService_iOS()
{
LocationServicesStatus = LocationServicesStatusEnum.Unknown;
}