Question

i have written a class which implements ListFieldCallBack like,

import java.util.Vector;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.component.ListField;
import net.rim.device.api.ui.component.ListFieldCallback;


    class ListCallBack implements ListFieldCallback
    {
        private Vector listelements = new Vector();

        public void drawListRow(ListField listField, Graphics graphics, int index, int y, int width) 
        {
            String text = (String)listelements.elementAt(index);
            graphics.drawText(text,0,y,0,width);
        }

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

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

        public int getPreferredWidth(ListField listField) 
        {
            return Graphics.getScreenWidth();
        }

        public void insert(String toInsert, int index)
        {
            listelements.addElement(toInsert);
        }   
        public void erase()
        {
            listelements.removeAllElements();
        }   
    }   

And in my constructor having the main class is coded as

helloWorld()
{
    mylist = new ListField();
    ListCallBack myCallBack = new ListCallBack();
    mylist.setCallback(myCallBack);
    for(int i = 0; i<array.length;i++)//array is a string array
    {
        list_category.insert(i);
        myCallBack.insert(array[i], i);
    }
    this.add(list_category);
}

this works properly..

like, i am getting output like,

Aby
Eric
Allay
vine

But i want to add another string to the next of that array in the each row displayed in list.. How could i do this?

Like, for example, i want my screen output like,

Aby     :  Smart
Eric    :  0000
Allay   :  9789
vine    :  Like

how could i do this?

Answer 1

You should change the ListFieldCallback.drawListRow(ListField listField, Graphics graphics, int index, int y, int width) to draw that.

Use net.rim.device.api.ui.Graphics API to draw whatever you want.