Android Question Open Number Pad with code

My app has option buttons to put in the down payment (5, 10, etc.) for a mortgage calculator. Tapping one of the buttons puts in the down payment and mortgage insurance factor. It also gives focus to the edit text field where the sales price is to be entered.

This is not a big deal, but it would be nice to also open the number pad. Is there a way to do this?

Thanks...