static async Task <Location> PlatformLocationAsync(GeolocationRequest request, CancellationToken cancellationToken)
{
await Permissions.RequireAsync(PermissionType.LocationWhenInUse);
Locator service = null;
var gps = Platform.GetFeatureInfo <bool>("location.gps");
var wps = Platform.GetFeatureInfo <bool>("location.wps");
if (gps)
{
if (wps)
{
service = new Locator(LocationType.Hybrid);
}
else
{
service = new Locator(LocationType.Gps);
}
}
else
{
if (wps)
{
service = new Locator(LocationType.Wps);
}
else
{
service = new Locator(LocationType.Passive);
}
}
var tcs = new TaskCompletionSource <bool>();
cancellationToken = Utils.TimeoutToken(cancellationToken, request.Timeout);
cancellationToken.Register(() =>
{
service?.Stop();
tcs.TrySetResult(false);
});
double KmToMetersPerSecond(double km) => km * 0.277778;
service.LocationChanged += (s, e) =>
{
if (e.Location != null)
{
lastKnownLocation.Accuracy = e.Location.Accuracy;
lastKnownLocation.Altitude = e.Location.Altitude;
lastKnownLocation.Course = e.Location.Direction;
lastKnownLocation.Latitude = e.Location.Latitude;
lastKnownLocation.Longitude = e.Location.Longitude;
lastKnownLocation.Speed = KmToMetersPerSecond(e.Location.Speed);
lastKnownLocation.Timestamp = e.Location.Timestamp;
}
service?.Stop();
tcs.TrySetResult(true);
};
service.Start();
await tcs.Task;
return(lastKnownLocation);
}