Changes ChoiceFiled field events called listener

Hello

I created a choicefield. and on the celine field auditor I show dialogue according to condtion the balance is zero.

now my problem is once the dialog is displayed then after that its dialog box indicating for each choice while I try to Ministry the choice.

lets say on the 3rd choice balance equals zero, dialog box appears, click ok to the 3rd selection dialog box is shwon in the choice field.

Now when Ministry choice so I filed select and browse throgh choice, then for each choice, even if the barrier is is greater than 0 for that pampers its display of the dialog box to balance still zero.

Please can you tell me the solution to verify that old selected index

How to check the selection choice is over or cela filed under selection mode.

Here is my code.

fDestination = new ObjectChoiceField ("", spinnerArray, 0, Field.FIELD_LEFT) {}
Protected Sub layout (int width, int height) {}
Super.Layout (fContext.getScreenWidth () / 3, 45);       setExtent (fContext.getScreenWidth () / 3, 45);

}

};

fDestination.setChangeListener (new FieldChangeListener() {}

' Public Sub fieldChanged (field field, int context) {}
try {}

int dest = fDestination.getSelectedIndex () - 1;
If (dest! = - 1) {}

{if (balanceArray [DEST].equalsIgnoreCase("0"))}
Dialog.Inform (fContext.getLabel ("Balance is 0. choose another destination'));
}
}

} catch (ArrayIndexOutOfBoundsException ex) {}

} catch (NullPointerException ex) {}

}

});

Here are my screenshots.

When I select an option where balance is not zero then its works fine but

Once selected pampers that dialogue balance 0 is expected. Then, for any choice his shwing even pop-up message.

        

This question has been asked before, and I've never had a very good answer.  In the past, I used focuslisteners, and when the ChoiceField loses focus, and then you check the value.  That works well.

But I had an idea, when I saw your question.  You see the list is actually a pop-up screen.  Because this is the view in front of your domain, it actually causes the onObscured() method and then pushes the onExposed() method when the shortcut menu is deleted.  So you can ignore the changes while it is happening.  Then you get only the last change!  And it seems to work.  Here is a test code - it assumes that the Boolean variable

displayingChoices

as a global code variable:

Now, in fact, onExposed and onObscured will be called in other circumstances, so to make the test bullets this code, you should probably check that the field is in focus.  But I think it will work as it is too.

Hope this works for you.

       String [] options = new String [] { "1", "2", "3", "4" };
        final ObjectChoiceField test = new ObjectChoiceField("Test: ", options) {
            public void onExposed() {
                displayingChoices = false;
            }
            public void onObscured() {
                displayingChoices = true;
            }
        };
        test.setChangeListener(new FieldChangeListener() {
            public void fieldChanged(Field field, int context) {
                if ( displayingChoices ) {
                    return;
                }
                Dialog.inform("Selected: " +test.getChoice(test.getSelectedIndex()));
            }
        });

test is declared final just because it was easier. So this isn't production code, this is just to demonstrate the idea.  Impement this your way.

Tags: BlackBerry Developers

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