Friday, July 27, 2012

Re: [android-developers] ListView with custom view item refresh issue

Look at and implement these methods:

http://developer.android.com/reference/android/widget/Adapter.html#getItemViewType(int)
http://developer.android.com/reference/android/widget/Adapter.html#getViewTypeCount()

Thanks,
Justin Anderson
MagouyaWare Developer
http://sites.google.com/site/magouyaware


On Thu, Jul 26, 2012 at 4:59 AM, Sergio Panico <sergio.panico@gmail.com> wrote:
Hi all,
I need your help to understand the refresh behaviour of a ListView where I've defined a my custom view for the ListView's items.

I think It's better explain it with an example:
my adapter contains 7 items: A, B, C, D, E, F, G correctly initialized, filled and working. The associated ListView shows 5 (out of 7) items: A, B, C, D, E.
The problem is that, when I scroll down the ListView's content instead of showing me items F and G, I've got A and B items again. I understood that this is "only" a viewing issue becouse the model elements associated with the last two items, correctly belong to F and G items. :|

Following the ovveride of getView(...) method of my adapter (extending BaseAdapter):

@Override
    public View getView(int position, View convertView, ViewGroup parent) {
        MyItemView miv = (( MyItemView  ) convertView);

        if (context == null) return null;

        if (convertView == null) {
            miv = new MyItemView (........);
            .....
        } else {
            miv.refreshView(); //refresh the view content
        }

        return miv;
    }

and the refreshView() method of MyItemView (extending LinearLayout):

@Override
    public void refreshView() {
        label1.setText(......);
        label2.setText(......);
        label2.setText(......);

        invalidate();
    }

Thanks a lot to all!
Bye
Sergio

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