How to set two xml's for one activity?If i select one option i have to get one xml and vice versa?

If i select "New customer" in customertype spinner(spn_cust) i have to show a view containing button,Spinner,Editext,textview.If i select "Existing Customer" i have to get another view conatining Button,Editext. How is it possible?Should i hide one xml while selecting one option?Programatically how will i solve this issue??

pncustomertype.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int position, long arg3) {
            //String item = spncustomertype.getItemAtPosition(position).toString();



        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });