Elements of the choice field update

I have two ChoiceFields on a page. I wish that the elements of the second ChoiceField to change according to the first selection of ChoiceFields. I tried to use an earpiece but I do not know how resassign the elements of the second ChoiceField

Can someone help me?

I would recommend that you try an ObjectChoiceField, because I think that it is easier to use.  So say you ObjectChoiceField A and B.  You fill in A (using setChoices()) and B make unmodifiable (setEditable (false)).  Then you have a FieldChangeListener on A and it was simply a setChoices on the second field, based on the value selected in the a.  Actually, on reflection, I think that I tried this and found that the FieldChangeListener got called in many times, so I ended up doing the setChoices for the B field in the onUnfocus() (or you can use a FocusListener if you do not want to replace the field).  At this point you can also make the field editable B.

Give this a go, or ask if I've explained very well.

Tags: BlackBerry Developers

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