Android parsing json returns exception-Collection of common programming errors

I am trying to parse a JSON using the JSONParser class presented below.

Based on breakpoints it seems like it’s crashing on this line of code:

HttpResponse httpResponse = httpClient.execute(httpPost);

I don’t know how to proceed with it. I will appreciate any help.

FRAGMENT

 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.agenda, container, false);
        final ListView listview = (ListView)view.findViewById(R.id.listView);
        String[] values = new String[] {"Summit 2013","Sponsors","Agenda","Survey","Website","Credits" };

        Log.v(TAG,"Created");
        String[] array = new String[10];
        array[0] = "";

        **new RetrieveFeedTask().doInBackground("");**

Async Task

class RetrieveFeedTask extends AsyncTask {

        private Exception exception;
        protected JSONObject doInBackground(String... params) {
            try {
               // URL url= new URL(urls[0]);
                JSONParser parser = new JSONParser();
                JSONObject jobject = parser.getJSONFromUrl("http://www.itenwired.com/json");
                return jobject;
            } catch (Exception e) {

                this.exception = e;
                Log.v(TAG,"Exception"+exception.getLocalizedMessage());
                return null;
            }
        }
        protected void onPostExecute(JSONObject result) {
            Log.v(TAG,"Downloaded");
            Log.v(TAG,result.toString());
        }
    }

JSON PARSER

package com.iten.itenwired2013;

/**
 * Created by jmc72 on 7/10/13.
 */
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import org.apache.http.client.HttpResponseException;

import android.util.Log;

public class JSONParser {
    private static final String TAG = "JSON PARSER";

    static InputStream is = null;
    static JSONObject jObj = null;
    static String json = "";

    // constructor
    public JSONParser() {

    }

    public JSONObject getJSONFromUrl(String url) {

        // Making HTTP request
        try {
            // defaultHttpClient
            DefaultHttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(url);
           // Log.v(TAG, httpPost.getURI().toString());
           //new HttpPost();
            httpPost.setHeader("Content-type", "application/json");
            Log.v(TAG, "01");
            HttpResponse httpResponse = httpClient.execute(httpPost);
            Log.v(TAG, "Aaa " + httpResponse.toString());
            HttpEntity httpEntity = httpResponse.getEntity();
            is = httpEntity.getContent();
            Log.v(TAG, "1");

        }
        catch (HttpResponseException e) {
            Log.v(TAG, "000");
        }
        catch (UnsupportedEncodingException e) {
            Log.v(TAG, "2");
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            Log.v(TAG, "3");
            e.printStackTrace();
        } catch (IOException e) {
            Log.v(TAG, "4");
            e.printStackTrace();
        }

        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            json = sb.toString();
        } catch (Exception e) {
            Log.e("Buffer Error", "Error converting result " + e.toString());

        }

        // try parse the string to a JSON object
        try {
            jObj = new JSONObject(json);
        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        // return JSON String
        return jObj;

    }
}

LOG CAT

07-12 14:18:19.713      322-656/system_process                 W/ActivityManager: Unbind failed: could not find connection for android.os.BinderProxy@40d233c0
07-12 14:18:20.953    1304-1304/?                              D/AndroidRuntime: >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit > AndroidRuntime START com.android.internal.os.RuntimeInit