Front Page activity that contains my RecyclerView

FrontPage.java

public class FrontPage extends AppCompatActivity
{
    private ProgressBar loadingProgress;
    private RecyclerView rvArticles;
    private EndlessRecyclerViewScrollListener scrollListener;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_front_page);

        rvArticles = findViewById(R.id.rv_front_page_articles);
        loadingProgress = findViewById(R.id.front_page_progress);

        try
        {
            URL topStories = HackerNewsAPI.buildTopStoriesURL();
            new ArticleQueryTask().execute(topStories);
        }
        catch (Exception ex)
        {
            Log.e("onCreate Error","Something happened");
            ex.printStackTrace();
        }

        LinearLayoutManager articlesLayoutManager =
                new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        rvArticles.setLayoutManager(articlesLayoutManager);

        scrollListener = new EndlessRecyclerViewScrollListener(articlesLayoutManager)
        {
            @Override
            public void onLoadMore(int page, int totalItemsCount, RecyclerView view)
            {
                loadMoreArticles(page);
            }
        };

        rvArticles.addOnScrollListener(scrollListener);
    }

    // This is where the dynamic loading magic should occur
    private void loadMoreArticles(int offset)
    {

    }

    public class ArticleQueryTask extends AsyncTask<URL, Void, ArrayList<String>>
    {
        @Override
        protected ArrayList<String> doInBackground(URL... urls) {
            URL searchURL = urls[0];
            String articleIDJSON = null; // variable for storing article ID JSON
            ArrayList<String> result = new ArrayList<>(); // variable for storing story response JSON

            try
            {
                articleIDJSON = HackerNewsAPI.getJSON(searchURL);

                // Store the article IDs in an ArrayList to turn them into URLs for API requests
                ArrayList<String> articleIDs = HackerNewsAPI.getStoryIDsFromJSON(articleIDJSON);

                // This processes EVERY article in the returned ArrayList
//                for (String url : articleIDs)
//                {
//                    URL articleURL = HackerNewsAPI.buildStoryURL(url);
//                    String jsonResult = HackerNewsAPI.getJSON(articleURL);
//                    result.add(jsonResult);
//                }

                // This just does the top 10
                for (int i = 0; i <= 9; i++)
                {
                    URL articleURL = HackerNewsAPI.buildStoryURL(articleIDs.get(i));
                    String jsonResult = HackerNewsAPI.getJSON(articleURL);
                    result.add(jsonResult);
                }
            }
            catch (IOException ex)
            {
                Log.e("ArticleQuery Error", "JSON error in doInBackground");
            }
            return result;
        }

        @Override
        protected void onPostExecute(ArrayList<String> result)
        {
            TextView tvError = findViewById(R.id.front_page_error);
            // Make sure that the progress bar is invisible once all tasks are done
            loadingProgress.setVisibility(View.INVISIBLE);

            // Logic for if no results are returned; if no results, display an error
            if (result == null || result.size() == 0)
            {
                rvArticles.setVisibility(View.INVISIBLE);
                tvError.setVisibility(View.VISIBLE);
            }
            else
            {
                rvArticles.setVisibility(View.VISIBLE);
                tvError.setVisibility(View.INVISIBLE);
            }

            // Get the article data from the JSON, put the data for each article in
            // an article object, and then put that object in an ArrayList of Articles
            // Then, use that ArrayList as the source for our ArticleAdapter, and
            // finally set the RecyclerView to use that adapter
            ArrayList<Article> articles = HackerNewsAPI.getArticlesFromJSON(result);
            ArticleAdapter adapter = new ArticleAdapter(articles);

            rvArticles.setAdapter(adapter);
        }

        @Override
        protected void onPreExecute()
        {
            super.onPreExecute();
            // Display the progress bar during execution
            loadingProgress.setVisibility(View.VISIBLE);
        }
    }
}