como gerar RadioButton dinâmico com um radiongroup no adapterView?

Tenho uma lista dinâmica ..

Quero mostrar essa lista na exibição do adaptador com botões de opção. em um grupo.

Eu usei

public class Type2Adapter extends BaseAdapter{
    Context context;    
    LayoutInflater inflater;
    ArrayList<QueOption> oplist;
    String list1;
    int count;
    RadioGroup radiogroup;
    String dot,more;
    public Type2Adapter(Context context,ArrayList<QueOption> arrayList){
        this.context = context;
        inflater = LayoutInflater.from(context);
        oplist = arrayList;
        count = oplist.size();
        if(count>=1){
            count = oplist.size();
        }else{
            count = 1;
        }
    }


    @Override
    public int getCount() {     
        return count;       
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder holder;      
        if(convertView == null){    

            holder = new ViewHolder();  
            convertView = inflater.inflate(R.layout.type2_option, null);            
//          holder.nameList = (RadioButton)convertView.findViewById(R.id.optionRadio);          
            holder.layout = (LinearLayout)convertView.findViewById(R.id.type2);     
            radiogroup = (RadioGroup)convertView.findViewById(R.id.optionRadioGroup);
            convertView.setTag(holder);
        }
        else{
            holder = (ViewHolder) convertView.getTag();
        }           
            holder.layout.setBackgroundResource(R.drawable.list_back_rowcolor);
//          holder.nameList.setText(oplist.get(position).getOptionName());
            RadioButton newRadioButton = new RadioButton(context);
            newRadioButton.setId(position); 
            newRadioButton.setText(oplist.get(position).getOptionName());           
            radiogroup.addView(newRadioButton); 

        return convertView;
    }

    public class ViewHolder{

        private LinearLayout layout;
        private RadioButton nameList;
    }

}

XMl:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">

  <LinearLayout
    android:id="@+id/type2"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >

        <RadioGroup 
            android:id="@+id/optionRadioGroup"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" >  


        </RadioGroup>   

  </LinearLayout>  

</LinearLayout>

o que devo fazer para resolver meu problema.