ListField action listener

Hi all

Im trying to create a list with a ListField that contains a list of vectors.

Now I want to put an action listener to the to the ListField then when somebody cliks something on the list of the application of the captures that.

I tried to do by adding listfield.setChangeListener, but it does not work

Here is my code.

public class ServerSelect extends MainScreen {
    private Main main;
    private ServerList serverlist;
    private Bitmap online, offline;
    private Vector list;
    private ListField listfield;
    private ListCallback callback;

    public ServerSelect(Main main)
    {
        this.main = main;
        online = Bitmap.getBitmapResource("talking.jpg");
        offline = Bitmap.getBitmapResource("not_talking.jpg");
        list = new Vector();
        listfield = new ListField();
        callback = new ListCallback();
        listfield.setCallback(callback);
        add(listfield);
        listfield.setChangeListener(selectServer);
        initializeList();
        reloadList();
    }

    private void reloadList()
    {
        listfield.setSize(list.size());
    }

    private void initializeList()
    {
        serverlist = new ServerList();
        for(int i = 0; i < serverlist.serverCount(); i++)
        {
            Server server = serverlist.printServers(i);
            list.addElement(server);
        }
    }

    public boolean onClose()
    {
        Connection.logout();
        close();
        return true;
    }
    //What I tried
    FieldChangeListener selectServer = new FieldChangeListener() {
        public void fieldChanged(Field field, int context) {
            int index = listfield.getSelectedIndex();
            Server server = (Server) callback.get(listfield, index);
            try {
                Connection.UseServer(server.getid());
            } catch (ConnectionClosedException e) {
                Dialog.alert("Connection closed");
            } catch (IOException e) {
                Dialog.alert(e.getMessage());
            }
            main.ChangeScreen("ServerUser");
        }
    };

    private class ListCallback implements ListFieldCallback
    {

        public void drawListRow(ListField listfield, Graphics g, int index, int y, int w)
        {
            Server server = (Server) list.elementAt(index);
            String text = server.toString();
            if(server.isOnline())
            {
                g.drawBitmap(new XYRect(0, 13, 15, 15), online, 0, 0);
            }
            else
            {
                g.drawBitmap(new XYRect(0, 13, 15, 15), offline, 0, 0);
            }
            g.drawText(text, 20, y, 0, w);
        } 

        public Object get(ListField listField, int index) {
            return list.elementAt(index);
        }

        public int getPreferredWidth(ListField listField) {
            return getWidth();
        }

        public int indexOfList(ListField listField, String prefix, int start) {
            return list.indexOf(prefix, start);
        }

    }
}

I hope you can help me.

Moochers

Welcome on the support forums.

I suggest that you crush navigationclick (and maybe keychar if you want to enter, return back... to do something).

Please note that blocking operations, such as networking, must be executed on a separate thread. Do not put this code directly in the event handler.

Tags: BlackBerry Developers

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