Being lucky to develop a backend and a Xamarin.Forms clients on your own? Sooner or later you will have to debug the API calls and it might become painful. Unless, you will follow the next rules:
- Configure your API URL to run on 127.0.0.1 instead of a localhost:
// .NET Core Web.Api example
public static IWebHost BuildWebHost(string args) =>
- Configure your Xamarin.Forms API consumer to have a conditional URL base:
string apiUrl = null;
if (Device.RuntimePlatform == Device.Android)
apiUrl = “http://10.0.2.2:5001/api“;
else if (Device.RuntimePlatform == Device.iOS)
apiUrl = “http://localhost:5001/api“;
throw new UnsupportedPlatformException();
The problem with Android emulator is that it maps 10.0.2.2 to 127.0.0.1, not to localhost. However, the iOS Simulator uses the host machine network.
That should be it!