Android Spinner, needs a menu for each item

First of all, I'm a beginner in android I have a spinner that needs specific menu for each item on the spinner. This is the basic spinner

<Spinner
    android:id="@+id/building_type"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:spinnerMode="dialog" />

and these are the items on the spinner

<string-array name="building_types">
    <item>W1</item>
    <item>W2</item>
    <item>S1</item>
    <item>S2</item>
    <item>S3</item>
    <item>S4</item>
    <item>S5</item>
    <item>C1</item>
    <item>C2</item>
    <item>C3</item>
    <item>PC1</item>
    <item>PC2</item>
    <item>RM1</item>
    <item>RM2</item>
    <item>URM</item>
</string-array>

and this is the class for the spinner

states = getResources().getStringArray(R.array.building_types);


    spinner = (Spinner) findViewById(R.id.building_type);

    ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_spinner_item, states);
    dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(dataAdapter);

    spinner.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> parent, View view,
                                   int position, long id) {
            //do what?
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {

        }
    });

when an user choose an item on the spinner, i want some specific radio boxes comes out. basically, it is just like

if building_types=="w1"
then show radiobox1
elseif building_types=="w2"
then show radiobox2
and so on 

all i have read on tuts is only toast some text after it got selected.

any tuts similiar to this case maybe? thanks.