android fragment sqlite how to fetch all data

android fragment unable to display sqlite data in listview below is my code . i dont understand what i am doing wrong.

public class WindowsFragment extends ListFragment {

@SuppressWarnings("null")
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    /** Creating array adapter to set data in listview */

    ArrayList<ContactListItems> contactList = new ArrayList<ContactListItems>();
    contactList.clear();
    String query = "SELECT * FROM PHONE_CONTACTS ";
    Cursor c1 = SqlHandler.selectQuery(query);
    if (c1 != null && c1.getCount() != 0) {
        if (c1.moveToFirst()) {
            do {
                ContactListItems contactListItems = new ContactListItems();

                contactListItems.setName(c1.getString(c1
                        .getColumnIndex("name")));

            } while (c1.moveToNext());
        }
    }
    c1.close();

    ContactListAdapter contactListAdapter = new ContactListAdapter(
            getActivity(), contactList);


    ListView simple_list_item_multiple_choice = null;
    simple_list_item_multiple_choice.setAdapter(contactListAdapter);

    return super.onCreateView(inflater, container, savedInstanceState);
}

@Override
public void onStart() {
    super.onStart();

    /** Setting the multiselect choice mode for the listview */
    getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
}

and below is my list adapter`public class ContactListAdapter extends BaseAdapter {

Context context;
ArrayList<ContactListItems> contactList;

public ContactListAdapter(Context context, ArrayList<ContactListItems> list) {

    this.context = context;
    contactList = list;
}

@Override
public int getCount() {

    return contactList.size();
}

@Override
public Object getItem(int position) {

    return contactList.get(position);
}

@Override
public long getItemId(int position) {

    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup arg2) {
    ContactListItems contactListItems = contactList.get(position);

    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.contact_list_row, null);

    }

    TextView tvName = (TextView) convertView.findViewById(R.id.tv_name);
    tvName.setText(contactListItems.getName());
    TextView tvPhone = (TextView) convertView.findViewById(R.id.tv_phone);
    tvPhone.setText(contactListItems.getPhone());

    return convertView;
}

}

i am able to successfully run using activity but not working with fragment