New SimpleCursorAdapter whenever data changes?

I'm just starting out with Android development and have been building a simple app that uses a ListActivity, a SQLiteDatabase, and a SimpleCursorAdapter.

On the Android developer website there is an example project that demonstrates the usage of the SimpleCursorAdadpter. Looking at the implementation, whenever the underlying database is modified as a result of some user action, the ListActivity explicitly calls the following function to "refresh" the list:

开发者_运维百科private void fillData() {
    // Get all of the rows from the database and create the item list
    mNotesCursor = mDbHelper.fetchAllNotes();
    startManagingCursor(mNotesCursor);

    // Create an array to specify the fields we want to display in the list (only TITLE)
    String[] from = new String[]{NotesDbAdapter.KEY_TITLE};

    // and an array of the fields we want to bind those fields to (in this case just text1)
    int[] to = new int[]{R.id.text1};

    // Now create a simple cursor adapter and set it to display
    SimpleCursorAdapter notes = 
        new SimpleCursorAdapter(this, R.layout.notes_row, mNotesCursor, from, to);
    setListAdapter(notes);
}

It looks like a new SimpleCursorAdapter is created every time and bound to the view with setListAdapter(). Is this the best/cleanest implementation? The fact that this is on the Android website lends it a lot of credibility, however I looked at the CursorAdapter documentation and saw there is a changeCursor() method that seems to lend itself to a cleaner implementation than the one above, but I'm just not sure what that might look like.

Maybe I'm just fretting over nothing, but coming from the C/C++ world, and seeing this "new" object created each time you insert/delete a row from the database seems a bit heavy-handed.

Yes, you are right. You can see that a lot of times. For small lists that may not produce any problems when list is always created in onResume. But that's no good style. You can use cursor.changeCursor() or adapter.notifyDataSetChanged().