Xamarin Android - Get the result of a Scan Honeywell

Question

I am deploying an app for a android scanner Honeywell. I guess that the internal scanner act like a keyboard because if I do the following, it works :

AppCompatEditText input = FindViewById<AppCompatEditText>(Resource.Id.input);
           AppCompatTextView output = FindViewById<AppCompatTextView>(Resource.Id.output);

            input.TextChanged += (object sender, Android.Text.TextChangedEventArgs e) => {
                output.Text = e.Text.ToString();
            };

( The Barcode is displayed in the TextView )

However, I'd like not to use a input EditText but track any scan performed without having to give focus to a field.

I have tried the following :

public override bool OnKeyUp(Keycode keyCode, KeyEvent e)
{

    Console.WriteLine(e.ToString()); // Or whatever property of object e

    return base.OnKeyUp(keyCode, e);
}

Unfortunately it looks like KeyEvent or Keycode class will not give the data but the code of the press key. Therefore I have a result like "190" ( Code of the key ) or "RIGHT_BUTTON" ( name of the key )..

Anybody who could give me a lead ???

Thanks a lot !

Pierre.