walk with button or remote control in google cardboar

Hello everybody.

Please, help me if you can. I did a scene on UE4 on VR android Google Cardboard, but the problem it is that I can’t walk.

So, how I can assign the Google Cardboard button or remote controller like this(…AZXAEHUU&psc=0) to walk in the direction of view?

thank you very much, it would be very important for me