I have one thing that I’ve been struggling to find out still though. How would I go about adding a row under each expanded group view that acts as a header and is the first child view in the list. I have 3 textviews that are populated on each child row so I’m looking to add a title such as Cost($), Date, Name to each child.

I was looking for an example of expandable list views with loaders and yours was simple and easy to implement.

Saved my day 🙂

int groupPos = groupMap.get(id);
mTreeAdapter.setChildrenCursor(groupPos, null);

if(rowsUpdated > 0) { getContext().getContentResolver().notifyChange(uri, null);
}

with this:

if(rowsUpdated > 0) { getContext().getContentResolver().notifyChange(BgContract.Measurements.CONTENT_URI, null);
}

I hope that will help you!

Thank you very much for this example it’s been really useful for me to understand how ExpandableListView and SimpleCursorTreeAdapter works.

I have used your example in my pet app but instead of using the contacts local provider I’m using one I have developed that provides an interface to a SQLite database. It woks as follows.

The UI thread would follow your example to show a ExpandableListView in a Fragment using two given uris (one for groups, another for childs) in the LoaderCallbacks funcions.

The same UI thread would launch at some point an AsyncTask that in the doInBackground function would query the server and call the insert function of the ContentResolver to modify the underlaying data that is being shown by ExpandableListView. Once the insert has been successful the ContentProvider calls notifyChange with the same uri that was used in the function onCreateLoader. The problem is that the SimpleCursorTreeAdapter seems to be missing the notification and it is not refreshing the data.

Reading your article I got the impression that I could expect the data shown in the UI to be refreshed automatically so I wonder if that is not the case when the notifyChange is being called from the same application (although different thread). do you know if that is the case? is there anything else I might be missing?

thanks in advanced
Javier

Hi Mark,
Thanks for the praise.
Well if you initialize it from a fragment you can call the getActivity() method in fragment.

Hope this makes sense.