Android : Adapter doesn't update with new items

my code after add new items in Array adapter does not update with new items. for example :

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        items = new ArrayList<ReceivedItemStructure>();

        getRequestFromServer(0, 10);
        adapter = new ReceivedAdapter(G.context, items);
        setListAdapter(adapter);

        getRequestFromServer(getLastID(), 10);
        adapter.notifyDataSetChanged();

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

private String getRequestFromServer(long lastID, int count) {
        String received = "";
        try {
            ...
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        return received;
    }

public ArrayList<ReceivedItemStructure> items;
public ReceivedAdapter adapter;

private void addDataToList(String LastID, String SmsBody, String SmsNumber, String SenderName, String ContactName, String Date) {
    String mLastID      = LastID;
    String mUserID      = config_username;
    String mSmsBody     = SmsBody;
    String mSmsNumber   = SmsNumber;
    String mSenderName  = SenderName;
    String mContactName = ContactName;
    String mDate = Date;
    ReceivedItemStructure item = new ReceivedItemStructure(
            mLastID,
            mUserID,
            mSmsBody,
            mSmsNumber,
            mSenderName,
            mContactName,
            mDate
    );
    items.add(item);
    adapter.notifyDataSetChanged();
}

My Adapter class is this code:

public class ReceivedAdapter extends ArrayAdapter<ReceivedItemStructure> {

    public ReceivedAdapter(Context c, List<ReceivedItemStructure> items) {
        super(c,0,items);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ReceiveItemView itemView = (ReceiveItemView)convertView;
        if (null == itemView)
            itemView = ReceiveItemView.inflate(parent);

        itemView.setItem(getItem(position));
        return itemView;
    }

}

for add new data into items i dont have any problem but i dont khnow why my adapter could not update with new data.