ListView/ListAdapter paging

Question

I'm trying to implement paging in a custom ListAdapter. Right now I'm just making the request for the next page when the last item in the ListView becomes visible, by checking in getView() if position is >= the size of ListAdapter.getCount().

It works fine, but I'm wondering if there's a better way (or a different way) that will only make the request once the last item in the list is actually visible to the user. Anyone know of a way?

Answer 1

Try removing the check altogether. In my experience, getView() is only called when the entry is about to come on screen.

Answer 2

I'm doing it almost the same way:

public static final int SCROLLING_OFFSET = 5;
// ...
private final ArrayList<T> items = new ArrayList<T>();
// ...
if (SCROLLING_OFFSET == items.size() - position) {
    if (hasNextPage()) {
        addNextPage();
    }
}

private boolean hasNextPage() {
    // basically calculates whether the last 2 pages contained the same # of items
}

private void addNextPage() {
    // show spinner
    // fetch next page in a background thread
    // add to items
    notifyDataSetChanged();
}