No Items to display

package com.emersonleaf.blogreader;

import android.app.ListActivity;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Html;
import android.util.Log;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;


public class MainListActivity extends ListActivity {


    protected String[] mBlogPostTitles;
    public static final int NUMBER_OF_POSTS = 20;
    public static final String TAG = MainListActivity.class.getSimpleName();
    protected JSONObject mBlogData;


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

        if (isNetworkAvailable()) {
            GetBlogPostTask getBlogPostTask = new GetBlogPostTask();
            getBlogPostTask.execute();
        } else {
            Toast.makeText(this, "Network is unavailable!", Toast.LENGTH_LONG).show();
        }

        // Resources resources = getResources();
        //mBlogPostTiles = resources.getStringArray(R.array.android_names);

        //ArrayAdapter <String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, mBlogPostTiles);
        //setListAdapter(adapter);

        //Toast.makeText(this, getString(R.string.no_items),Toast.LENGTH_LONG).show();

    }

    private boolean isNetworkAvailable() {
        ConnectivityManager manager = (ConnectivityManager)
                getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();

        boolean isAvailable = false;
        if (networkInfo != null && networkInfo.isConnected()) {
            isAvailable = true;

        }
        return isAvailable;
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main_list, menu);
        return true;

    }

    public void updateList() {
        if (mBlogData == null) {
            //to do: handle error
        } else {

            try {
                JSONArray jsonPosts = mBlogData.getJSONArray("posts");
                mBlogPostTitles = new String[jsonPosts.length()];
                for (int i = 0; i < jsonPosts.length(); i++){
                    JSONObject post = jsonPosts.getJSONObject(i);
                    String title = post.getString("title");
                    title = Html.fromHtml(title).toString();
                    mBlogPostTitles[i] = title;

                }

                ArrayAdapter <String> adapter = new ArrayAdapter<String>(this,
                        android.R.layout.simple_list_item_1, mBlogPostTitles);
                setListAdapter(adapter);

            } catch (JSONException e) {
                Log.e(TAG, "Exception caught!", e);
            }
        }
    }


        private class GetBlogPostTask extends AsyncTask<Object, Void, JSONObject> {


            @Override
            protected JSONObject doInBackground(Object[] objects) {
                int responseCode = -1;
                JSONObject jsonResponse = null;
                //URL blogFeedUrl = new URL("http://blog.teamtreehouse.com/api/get_recent_summary/?count =" + NUMBER_OF_POSTS);
                try {
                    URL blogFeedUrl = new URL("http://blog.teamtreehouse.com/api/get_recent_summary/?count=" + NUMBER_OF_POSTS);
                    HttpURLConnection connection = (HttpURLConnection) blogFeedUrl.openConnection();
                    connection.connect();

                    //Creating are response code so that we can get data from the internet
                    responseCode = connection.getResponseCode();
                    if (responseCode == HttpURLConnection.HTTP_OK) {
                        InputStream inputStream = connection.getInputStream();
                        Reader reader = new InputStreamReader(inputStream);
                        int nextCharacter; // read() returns an int, we cast it to char later
                        String responseData = "";
                        while (true) { // Infinite loop, can only be stopped by a "break" statement
                            nextCharacter = reader.read(); // read() without parameters returns one character
                            if (nextCharacter == -1) // A return value of -1 means that we reached the end
                                break;
                            responseData += (char) nextCharacter; // The += operator appends the character to the end of the string
                            jsonResponse = new JSONObject(responseData);
                        }


                    } else {
                       Log.i(TAG, "Unsuccessful HTTP response Code:  " + responseCode);
                    }
                } catch (MalformedURLException e) {
                    Log.e(TAG, "Exception caught: ", e);
                } catch (IOException e) {
                    Log.e(TAG, "Exception caught: ", e);
                } catch (Exception e) {
                    Log.e(TAG, "Exception caught: ", e);
                }
                return jsonResponse;
            }

            @Override
            protected void onPostExecute(JSONObject result) {
                mBlogData = result;
                updateList();


            }
        }


    }