How to Update single galleryview children?

Question

How to call notifyDataSetChanged() for only one element of gallery? Default call update evrything, which is quite resourse expencieve and unnecessary. I want solution, which works fro API 8.

What adapter base class are you using? – talkol Jul 25 '13 at 06:42 — talkol, Jul 25 '13 at 06:42

score 1 · Accepted Answer · edited May 23 '17 at 12:03

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To do that you need to find the row view that you want to refresh and make the refresh manually. Something like this:

private void updateSingleView(int i) {

    View viewToUpdate = listview.getChildAt(i - listview.getFirstVisiblePosition());
    //Do whatever update you need to do
    viewToUpdate.invalidate(); //Or postInvalidate() if you call it from a non Ui thread.
}

Found by this SO question.

edited May 23 '17 at 12:03

Community

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answered Jul 25 '13 at 06:45

AggelosK

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I have a problem. It does not work for galleryview. – Yarh Jul 25 '13 at 08:22
@user1551603 I suggest you move from `Gallery` to `ViewPager` since it is depracated from API 16 and up. You can use the android compatibility library to use the `ViewPager` in API 8 that you need. Link: http://developer.android.com/reference/android/widget/Gallery.html – AggelosK Jul 25 '13 at 08:50
i just dont want to rebuild quite big infrastacture:) – Yarh Jul 25 '13 at 08:57
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@user1551603 You are right it requires quite a lot changes in your code but this way you futureproof your app and also I do not think what you ask is possible in Gallery (at least i do not know a way of achieving this to be frank:) ). – AggelosK Jul 25 '13 at 09:15

How to Update single galleryview children?

1 Answers1