private void UpdateMap(string polyline)
{
if (!String.IsNullOrEmpty(polyline))
{
List <BasicGeoposition> Coordinates = PolylineDecoder.Decode(polyline);
MapPolyline MapPolyline = new MapPolyline();
MapPolyline.StrokeColor = Colors.OrangeRed;
MapPolyline.StrokeThickness = 2;
MapPolyline.Path = new Geopath(Coordinates);
this.FeedMapView.MapElements.Add(MapPolyline);
FeedMapView.Center = new Geopoint(Coordinates[0]);
}
}
public static async Task <Image> LoadActivityPreviewAsync(string polyline, Dimension dimension, MapType mapType)
{
if (dimension.Width == 0 || dimension.Height == 0)
{
throw new ArgumentException("Both width and height must be greater than zero.");
}
List <Coordinate> c = PolylineDecoder.Decode(polyline);
string markerStart = $"&markers=icon:http://tinyurl.com/np8ozqm%7C{c.First().Latitude},{c.First().Longitude}";
string markerEnd = $"&markers=icon:http://tinyurl.com/mzj8mvq%7C{c.Last().Latitude},{c.Last().Longitude}";
string url = $"http://maps.googleapis.com/maps/api/staticmap?sensor=false&maptype={mapType.ToString().ToLower()}&size={dimension.Width}x{dimension.Height}&{markerStart}&{markerEnd}&path=weight:3|color:red|enc:{polyline}";
return(await ImageLoader.LoadImage(new Uri(url)));
}
/// <summary>
/// Loads an image of a map.
/// </summary>
/// <param name="polyline">The polyline of your activity.</param>
/// <param name="dimension">The dimension of the picture which will be returned.</param>
/// <param name="mapType">Choose the map type of the image.</param>
/// <returns>An image of your activity on the specified map.</returns>
public static async Task <Image> LoadActivityPreviewAsync(String polyline, Dimension dimension, MapType mapType)
{
if (dimension.Width == 0 || dimension.Height == 0)
{
throw new ArgumentException("Both width and height must be greater than zero.");
}
List <Coordinate> c = PolylineDecoder.Decode(polyline);
String markerStart = String.Format("&markers=icon:http://tinyurl.com/np8ozqm%7C{0},{1}", c.First().Latitude, c.First().Longitude);
String markerEnd = String.Format("&markers=icon:http://tinyurl.com/mzj8mvq%7C{0},{1}", c.Last().Latitude, c.Last().Longitude);
String url = String.Format("http://maps.googleapis.com/maps/api/staticmap?sensor=false&maptype={0}&size={1}x{2}&{3}&{4}&path=weight:3|color:red|enc:{5}",
mapType.ToString().ToLower(),
dimension.Width,
dimension.Height,
markerStart,
markerEnd,
polyline);
Image image = await ImageLoader.LoadImage(new Uri(url));
return(image);
}