Ho To in twitter4j get Twitter timeline by pages

gistfile1.txt

private class TimeLineLoader extends AsyncTask<Void, Void, List<Status>> {
    private AdapterTweets adapter;
    private SwipyRefreshLayoutDirection direction;
    private SwipyRefreshLayout mSwipyRefreshLayout;
    TimeLineLoader(final AdapterTweets adapter, SwipyRefreshLayout swipyRefreshLayout){
        this.adapter = adapter;
        this.mSwipyRefreshLayout =swipyRefreshLayout;
        this.direction = swipyRefreshLayout.getDirection();
    }
    
    @Override
    protected List<twitter4j.Status> doInBackground(Void... voids) {
        try {
            if (pages == null) {
                pages = new Paging(1, 20);
            } else {
                twitter4j.Status s = timeline.get(timeline.size()-1);
                pages = new Paging();
                switch (direction){
                    case TOP:
                        pages.setSinceId(s.getId());
                        break;
                    case BOTTOM:
                        pages.setMaxId(s.getId());
                        break;
                }
            }
            timeline = twitter.getUserTimeline("Twitter",pages);
            return timeline;
        } catch (TwitterException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(List<twitter4j.Status> result) {
        if (result != null) {
            switch (direction){
                case TOP:
                    adapter.addAll(result);
                    break;
                case BOTTOM:
                    result.remove(0);
                    //Удаляем дубль элемента.
                    // так как первый элемент предыдущей страницы Timeline
                    // начинается с последнего элемента первой страницы
                    adapter.addAll(result);
                    break;
            }
            adapter.notifyDataSetChanged();
        } else {
            showToast("Не удалось получить список");
        }
        mSwipyRefreshLayout.setRefreshing(false);
    }
}