FilterQueryProvider, filter and ListView

Question

I have a database as follows:

------------------------------
BOOK NAME | BOOK FORMAT | COUNT |
------------------------------
Android   | HTML       | 1
WPF          


        

Answer 1

I think you've messed up things a bit. Actually SimpleCursorAdapter already implements Filterable, so there's no need to reimplement it. Instead in your ListActivity use smth like this:

private void filterList(CharSequence constraint) {
    final YourListCursorAdapter adapter = 
        (YourListCursorAdapter) getListAdapter();
    final Cursor oldCursor = adapter.getCursor();
    adapter.setFilterQueryProvider(filterQueryProvider);
    adapter.getFilter().filter(constraint, new FilterListener() {
        public void onFilterComplete(int count) {
            // assuming your activity manages the Cursor 
            // (which is a recommended way)
            stopManagingCursor(oldCursor);
            final Cursor newCursor = adapter.getCursor();
            startManagingCursor(newCursor);
            // safely close the oldCursor
            if (oldCursor != null && !oldCursor.isClosed()) {
                oldCursor.close();
            }
        }
    });
}

private FilterQueryProvider filterQueryProvider = new FilterQueryProvider() {
    public Cursor runQuery(CharSequence constraint) {
        // assuming you have your custom DBHelper instance 
        // ready to execute the DB request
        return dbHelper.getListCursor(constraint);
    }
};