[android help] Wat is the best way to refresh a android's listview

I want to refresh the listView after an insert or delete in the database.. I search and i found notifyDataSetChanged () but i don't know how to use it..

I used AsyncTask to get the data from the server and insert it into the SQLite database. The problem is, the AsyncTask class is in a another file. So how can i access the adapter or the listview from the AsyncTask class?

Someone can explain how to do this? Even by a different way..

Here is my code...

public class devicesController extends SherlockFragment {

    devicesDataSource deviceDS;
    static devicesAdapter adapter;
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){ 
        View view = inflater.inflate(R.layout.devices, container, false);

        /// Set device's datasource
        deviceDS = new devicesDataSource(getActivity());

        /// Assign the listview from the xml layout
        ListView lv1 = (ListView) view.findViewById(R.id.devicesList);

        /// Getting all devices from the SQLite database
        deviceDS.open();
        List allDevices = null;
        try {
            allDevices = deviceDS.getAll();
        } catch (ParseException e) {
            e.printStackTrace();
            Log.i("QUTAYBA", "ERROR showing data");
        }


        /// Set the results rows in a list adapter
        adapter = new devicesAdapter(getActivity(), R.layout.devices_list, allDevices);
        lv1.setAdapter(adapter);

    return view;

    }

.

stackoverflow.comm