Xamarin.Forms Interface


The interface defines the behaviour that you want to expose through the DependencyService. One example usage of a DependencyService is a Text-To-Speech service. There is currently no abstraction for this feature in Xamarin.Forms, so you need to create your own. Start off by defining an interface for the behaviour:

public interface ITextToSpeech
       void Speak (string whatToSay);

Because we define our interface we can code against it from our shared code.

Note: Classes that implement the interface need to have a parameterless constructor to work with the DependencyService.