Question

Since java does not support multiple inheritance I have a problem getting this to work.

This is what I want to do :

public class CallForwardActivity extends ListActivity /* This is there I want to extend AsyncTask */ implements OnSharedPreferenceChangeListener
{

... // creating and initializing stuff

@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);

    userInfo = this.getSharedPreferences(USERINFO_FILE, 0);
    userInfo.registerOnSharedPreferenceChangeListener(this);
    userControl = new UserController(context);
    ListView lv = getListView();
    lv.setTextFilterEnabled(true);
    //setListAdapter(new ArrayAdapter<String>(this, R.layout.callforward_items, R.id.callforward_item_text, callforwardLabels));

    list = new ArrayList<HashMap<String,String>>();

    callForwardList = new SimpleAdapter( 
            this, 
            list,
            R.layout.callforward_items,
            new String[] { "line1","line2" },
            new int[] { R.id.callforward_item_text, R.id.callforward_number } );



    populateList();
    setListAdapter( callForwardList );

    lv.setOnItemClickListener(new OnItemClickListener() {

    public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
    {
        CustomDialog(); // this will make the asynchronous task call if the user presses "OK" within the dialog box.
    }

  });

}

How do I go about making the call asynchronous without extending AsyncTask ?

Answer 1

Just create another class that extends AsyncTask and use it in your ListActivity. You can make it inner if you like. Hope this helps.