How do you display a 2 digit NumberPicker in android?

Implement a custom NumberPicker.Formatter that implements your value display padding and call setFormatter.

 NumberPicker monthPicker = (NumberPicker) view.findViewById(R.id.np_month);
        monthPicker.setMinValue(1);
        monthPicker.setMaxValue(12);
        monthPicker.setFormatter(new NumberPicker.Formatter() {
            @Override
            public String format(int i) {
                return String.format("%02d", i);
            }
        });

    numberPicker.setMaxValue(10);
    numberPicker.setMinValue(0);
    numberPicker.setFormatter(new NumberPicker.Formatter() {
        @Override
        public String format(int i) {
            return String.format("%02d", i);
        }
    });

This will do the trick!