Datalogic.Device.Input.AdvancedKeyboard method missing

I have a Scorpio x4 and I use xamarin-sdk.
I would to use a namespace .com.datalogic.device.input for read keyboard.
In documentation i see class AdvancedKeyboard.
I try to istance it but it hasn’t a costructor.

And I don’t find methods (I have lastest version of sdk)


AddActionEventListener(AdvancedKeyboard.IActionEventListener, Int32)AddActionEventListener(AdvancedKeyboard.IActionEventListener, Int32, Boolean)

Have a sample for namespace namespace .com.datalogic.device.input?

Marco Pedrazzi