I've hit a problem in changing over to a CursorAdapter. The custom items in my ListView contained a Checkbox. After reading online, I had successfully implemented maintaining the state of the Checkbox such that it worked with view recycling: I was storing the state of the Checkbox in the same object as was added to my ArrayAdapter. This way, I was able to retrieve and set this state correctly in the getView() method of my custom ArrayAdapter.
Now, when I switch over to a CursorAdapter, all of the data used to populate my view is coming from a Cursor... I've figured out how to handle view recycling over the new bindView() and newView() methods (http://stackoverflow.com/questions/3535074/getview-vs-bindview-in-a- custom-cursoradapter), but how do I handle this Checkbox state thing? Does it now necessarily have to be a part of my database (seems to be the case if all bindView() and newView() get is a Cursor...)? This means that now every time a user checks/unchecks an item in my ListView, I'm making a database update() call to save the Checkbox state. Is this the way to do it? Thanks for your patience. I'm trying to explain the problem as clearly as I can, but to be honest, I'm just trying to understand it myself, so I'm not sure if it is coming across in a coherent manner. On Feb 24, 10:40 am, Kookamonga <[email protected]> wrote: > Thanks for your answer. > > I'll change over to a CursorAdapter and see how things go. > > On Feb 24, 10:30 am, skink <[email protected]> wrote: > > > > > > > > > Kookamonga wrote: > > > I have what seems like a very basic question: how can I maintain the > > > sorted state of a ListView as new items are added to the list? > > > > I have a ListView that is populated from a database. Specifically, I > > > query my database, create an ArrayList of items, and use a custom > > > ArrayAdapter<MyType> as the adapter of the ListView. > > > > Now, I understand that I can use ORDER BY in my db query when > > > initially populating the list. But what about when new items are > > > inserted? I also understand that I can call the .sort() method on the > > > ArrayAdapter<...> passing in a Comparator... But does this mean that I > > > have to call sort every time a new object is added to my database (and > > > thus, my ListView is updated)? That doesn't seem right. > > > > The answer here (http://stackoverflow.com/questions/3496137/how-to- > > > update-a-cursoradapter-tied-to-listview-when-number-of-items-changes) > > > by JRL seems to indicate that using a CursorAdapter doesn't really > > > solve the problem either. > > > > I have searched around but not found an answer to this question. All > > > I've found is help on how to sort in the first place, for example: > > >http://groups.google.com/group/android-developers/browse_thread/threa.... > > > > What I need is something like a setSorter(...) method that's available > > > on certain Eclipse Viewers. Does something like this exist? > > > > Thanks as usual for your help! > > > what you need is a CursorAdapter, nothing more > > > pskink -- 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
