public void OnLocationChanged(Location location)
{
if (location.Accuracy <= desiredAccuracy)
{
Finish(location);
return;
}
lock (locationSync)
{
if (GeolocationUtils.IsBetterLocation(location, bestLocation))
{
bestLocation = location;
}
}
}
/// <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);
}
}
