ListView handles that already. The problem is that you are creating a new adapter every time you reload the data. That's not how you should use ListView and its adapter. Instead of setting a new adapter (which causes ListView to reset its state), simply update the content of the adapter already set on the ListView. And the selection/scroll position will be saved for you.
On Tue, Apr 7, 2009 at 7:36 AM, DavidG <[email protected]> wrote: > > In my app, my main class extends ListActivity and calls a fillData() > function to reload the list whenever changes are made. I'm still > getting the hang of this, so I borrowed that concept from the Android > Notepadv1-Notepadv3 tutorials. Everything works great, however > whenever I need to change the list (remove an item, re-sort it, edit > an item), the ListView refreshes and loses its scroll position. The > scroll position is reset to the top after each fillData() call. > > I saw the following thread a similar issue, but can't wrap my head > around the solution: > http://groups.google.com/group/android-developers/browse_thread/thread/0b648ce2fe622463/7d40155d450d1196?lnk=raot > > It appears to be resetting the scroll position to the top because I'm > using setListAdapter() each time in fillData(), setting it to a new > SimpleCursorAdapter. How can I get the list to "update in place", > where the scroll position is seamlessly maintained to the user? I > tried heading down the "items.changeCursor(cursor)" path, but that > didn't seam to do much for me. Any help would be appreciated. Here's > the code: > > private void fillData(boolean sortOption) { > Cursor itemCursor = mDbHelper.fetchAllItems(sortOption); > startManagingCursor(itemCursor); > > String[] from = new String[] { DbA.KEY_ITEM, DbA.DESCRIPTION, > DbA.KEY_CHECKED }; > int[] to = new int[] { R.id.itemText, R.id.itemDescription, > R.id.content }; > > SimpleCursorAdapter items = new SimpleCursorAdapter > (this,R.layout.item_row, itemCursor, from, to); > items.setViewBinder(new ItemBinder()); > setListAdapter(items); > } > > > > -- Romain Guy Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support. All such questions should be posted on public forums, where I and others can see and answer them --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
