How to create dependent choice group in j2me

Question

I wish any one could help me in solving the problem.
I want to use choiceGroup.popup. But want to make a dependent choiceGroup.popup.
eg.
category , subcategory and inner subcategory .
When i choose electronics from category then from sub category all electronic item should be seen and
when i choose one electronic item then in inner subcategory specific item of that sub category should be shown.
How to do that. what to use, in web we use Ajax but in j2me all devices may not support ajax. so need a helping hand to solve this problem.
Thank you.
Edited by: J2me_Beginner on May 22, 2009 12:05 AM

Answer 1

-- Use an ItemStateListener to detect the selection.
-- Either: deleteAll() and append(...) to replace the contents of the second ChoiceGroup
-- Or: remove(...) the second ChoiceGroup and insert(...) a different ChoiceGroup with the appropriate choices.
I really can't see where AJAX comes into all this.
db
edit Or set(...) instead of remove(...) and insert(...), but I vaguely remember that some devices have been reported to have a buggy implementation of set(...). No, I can't remember which devices but I think the problem only arose when the substituted Item was of a different size on screen, so swapping one ChoiceGroup.POPUP with another shouldn't be a problem.
Edited by: DarrylBurke