Android : Custom array adapter doesn't work in DialogFragment

I want to populate a list view with custom array adapter, however it looks like getView() is never called. Below is my code, this part creates the dialog:

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Use the Builder class for convenient dialog construction
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setPositiveButton("Delete", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            //do deletion
        }
    })
            .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    // User cancelled the dialog
                }
            });
    builder.setTitle("Dialog title").setView(getCustomView());
    return builder.create();
}

This part creates the view, I commented on which works, which doesn't

public View getCustomView(){
    LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view  = inflater.inflate(R.layout.dialog_delete_option, null);
    ListView listView = (ListView) view.findViewById(R.id.listDelOptions);

    /*this is default array adapter, works */
    List<String> list = new ArrayList<String>();
    list.add("del one");
    list.add("del all");
    ArrayAdapter<String> defaultAdapter = new ArrayAdapter<String>(getActivity(),
            android.R.layout.simple_list_item_single_choice, list);

    /*this is custom adapter, NOT working */
    mAdapter = new DeleteAdapter(getActivity(),0); //last int is not used since we
    //know which layout to inflate

    //NOT working
    //listView.setAdapter(mAdapter);
    //mAdapter.notifyDataSetChanged();

    //working
    listView.setAdapter(defaultAdapter);
    return view;
}

This is the custom array adapter, only getView is relevant, but post here the whole class in case.

public static class DeleteAdapter extends ArrayAdapter{
    private final int mLayoutId;
    private int mCheckPos;
    Context mContext;
    String [] mButtonDescription;

    public DeleteAdapter(Context context, int resource) {
        super(context, resource);
        mLayoutId= R.layout.delete_list_item_view;
        mContext = context;
        mCheckPos = 0;
        mButtonDescription = new String[3];
        mButtonDescription[0] = context.getString(R.string.del_only_this_event);
        mButtonDescription[1] = context.getString(R.string.del_this_and_future_events);
        mButtonDescription[2] = context.getString(R.string.del_all_events);

    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view =convertView;
        if (view==null){
            view =  View.inflate(mContext,mLayoutId, null);
        }
        RadioButton button = (RadioButton) view.findViewById(R.id.rdDelOption);
        button.setTag(new Integer(position));
        button.setOnCheckedChangeListener(checkedChangeListener);
        if (position== mCheckPos)
            button.setChecked(true);
        else
            button.setChecked(false);
        button.setText(mButtonDescription[position]);
        return  view;
    }

    CompoundButton.OnCheckedChangeListener checkedChangeListener = new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked){
                mCheckPos =  (Integer) buttonView.getTag();//tag is the position
            }
        }
    };


    public int getSelectedItem(){
        return mCheckPos;
    }

}

What's wrong with my DeleteAdapter? Thanks.