capturing softkey strokes in a xamarin forms application

We are developing xamarin forms based application for an Android target platform which can be used by sales representatives who will be travelling on the allocated route(to them) to deliver food items. We have a requirement to capture keystrokes(softkeys on the keypad) which can be used for UT/Regression testing/Debugging sales representatives field level issues.
Based on my reading what I found is that we have to use ‘behaviors’ for capturing events for a particular control.
https://developer.xamarin.com/recipes/cross-platform/xamarin-forms/choose-keyboard-for-entry/
Let me know what will be the best design/approach for this requirement.