protected override async void OnAppearing()
{
base.OnAppearing();
var result = "";
var client = new HttpClient();
result = await client.GetStringAsync(Url);
var json = JsonConvert.DeserializeObject <Base>(result).Features;
BadiList = new ObservableCollection <Badi>(json);
_badiCopy = new ObservableCollection <Badi>(BadiList);
var locator = CrossGeolocator.Current;
locator.DesiredAccuracy = 50;
var position = await locator.GetPositionAsync(10000);
foreach (var item in BadiList)
{
item.Geometry.Distance = Math.Round(locationHelper.CalculateDistance(item.Geometry.Coordinates[1], item.Geometry.Coordinates[0], position.Latitude, position.Longitude, 'K'), 1) + "km entfernt";
}
}
public void TestDistance()
{
var locA = new Location {
Latitude = 52.216542, Longitude = 5.4778534
};
var locB = new Location {
Latitude = 50.91414, Longitude = 5.95549
};
var locC = new Location {
Latitude = -20.34334, Longitude = -1.3540565
};
Assert.AreEqual(LocationHelper.CalculateDistance(locA, locB), 148500, 1000);
Assert.AreEqual(LocationHelper.CalculateDistance(locA, locC), 8095500, 1000);
}