update the listview after inserting a new record with simpleCursorAdapter - requery()

Question

I understand the requery() mechanic, but i do not understand the implementation:

protected void onCreate(Bundle savedInstanceState) {
        super.         


        

Answer 1

the requery cursor method is deprecated. but you're right you have to reload the cursor and then make sure that your new cursor is being presented to your ListView. for a quick 'n dirty solution, I suggest you make your adapter a field. and then use the following method:

private void requery() {
    Cursor values = datasource.getAllCategorie();
    adapter.changeCursor(values);
}

What it does is remake a cursor. then by calling changeCursor you swap the old cursor for the new one and the old one is closed automatically. at the very least, you save yourself from making a new adapter. The more sophicated approach with all the trim and fixes i suppose would be to implement a CursorLoader which would perform the process automatically when the database content has been changed.