I got a code from Android Hive to parse JSON data from url. Then I am trying to implement the same code on Rotten Tomatoes Upcoming Movies Api. I have implemented the same code with almost modifying all the xml files according to my needs. But the problem is when I am trying to run the code, its showing NetworkOnMainThread Exception.

This is my code..

public class Upcoming extends ListActivity
{

String url = "http://api.rottentomatoes.com/api/public/v1.0/lists/movies/upcoming.json?apikey=yvvgsv722gy2zkey3ebkda5t";

final String TAG_MOVIES = "movies";
final String TAG_ID = "id";
final String TAG_TITLE = "title";
final String TAG_YEAR = "year";
final String TAG_MPAA_RATING = "mpaa_rating";
final String TAG_RUNTIME = "runtime";
final String TAG_RELEASE_DATES = "release_dates";
final String TAG_RATINGS = "ratings";
final String TAG_CRITIC_RATING = "critics_ratings";
final String TAG_AUDIENCE_RATING = "audience_ratings";
final String TAG_SYNOPSIS = "synopsis";
final String TAG_POSTERS = "posters";

JSONArray upcomings = null;

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

    ArrayList<HashMap<String, String>> UpcomingList = new ArrayList<HashMap<String, String>>();


 // Creating JSON Parser instance
    JSONParser jParser = new JSONParser();

    // getting JSON string from URL
    JSONObject json = jParser.getJSONFromUrl(url);

    try {
        // Getting Array of Contacts
        upcomings = json.getJSONArray(TAG_MOVIES);

        // looping through All Contacts
        for(int i = 0; i < upcomings.length(); i++){
            JSONObject c = upcomings.getJSONObject(i);

            // Storing each json item in variable
            String id = c.getString(TAG_ID);
            String title = c.getString(TAG_TITLE);
            String year = c.getString(TAG_YEAR);
            String mpaa_rating = c.getString(TAG_MPAA_RATING);
            String runtime = c.getString(TAG_RUNTIME);

            JSONObject release_dates = c.getJSONObject(TAG_RELEASE_DATES);
            JSONObject ratings = c.getJSONObject(TAG_RATINGS);
            String critic_rating = c.getString(TAG_CRITIC_RATING);
            String audience_rating = c.getString(TAG_AUDIENCE_RATING);
            String synopsis = c.getString(TAG_SYNOPSIS);
            JSONObject posters = c.getJSONObject(TAG_POSTERS);


            HashMap<String, String> map = new HashMap<String, String>();

            map.put(TAG_TITLE, title);
            map.put(TAG_YEAR, year);
            map.put(TAG_CRITIC_RATING, critic_rating);
            map.put(TAG_AUDIENCE_RATING, audience_rating);

            UpcomingList.add(map);

        }
    } catch (JSONException e) {
        e.printStackTrace();
    }

    ListAdapter adapter = new SimpleAdapter(this, UpcomingList,
            R.layout.activity_upcoming,
            new String[] { TAG_TITLE, TAG_YEAR, TAG_CRITIC_RATING, TAG_AUDIENCE_RATING }, new int[] 
                    {
                    R.id.title, R.id.year, R.id.critic_rating, R.id.audience_rating });

    setListAdapter(adapter);

    // selecting single ListView item
    ListView lv = getListView();

    // Launching new screen on Selecting Single ListItem
    lv.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            // getting values from selected ListItem
            String name = ((TextView) view.findViewById(R.id.title)).getText().toString();
            String cost = ((TextView) view.findViewById(R.id.year)).getText().toString();
            String critic_rating = ((TextView) view.findViewById(R.id.critic_rating)).getText().toString();
            String audience_rating = ((TextView) view.findViewById(R.id.audience_rating)).getText().toString();

            // Starting new intent
            Intent in = new Intent(getApplicationContext(), Upcoming.class);
            in.putExtra(TAG_TITLE, name);
            in.putExtra(TAG_YEAR, cost);
            in.putExtra(TAG_CRITIC_RATING, critic_rating);
            in.putExtra(TAG_AUDIENCE_RATING, audience_rating);
            startActivity(in);
        }
    });
}


 }

Can anyone please help me with anything I am missing.? I am totally blind on it now. Thanx in advance.