title: Android HttpGet android.os.NetworkOnMainThreadException
body: <p>Im having trouble running the HttpGet, I can access the site with the broswer of the emulator,
  but when I try to run my application I get these errors.</p>
  
  <pre><code>12-15 05:34:20.573    1702-1702/com.albertoortega.flordemaria E/AndroidRuntime﹕ FATAL EXCEPTION: main
      android.os.NetworkOnMainThreadException
              at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
              at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
              at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
              at libcore.io.IoBridge.connect(IoBridge.java:112)
              at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
              at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
              at java.net.Socket.connect(Socket.java:842)
              at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
              at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
              at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
              at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
              at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
              at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
              at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
              at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
              at com.albertoortega.flordemaria.Objects.JSONParser.makeHttpRequest(JSONParser.java:65)
              at com.albertoortega.flordemaria.ActivityLogin$GetLogin$1.run(ActivityLogin.java:98)
              at android.os.Handler.handleCallback(Handler.java:725)
              at android.os.Handler.dispatchMessage(Handler.java:92)
              at android.os.Looper.loop(Looper.java:137)
              at android.app.ActivityThread.main(ActivityThread.java:5041)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:511)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
              at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>Here's the actual code.</p>
  
  <pre><code>new GetLogin().execute();
  
  class GetLogin extends AsyncTask&lt;String, String, String&gt; {
  
          @Override
          protected void onPreExecute() {
              super.onPreExecute();
              pDialog = new ProgressDialog(ActivityLogin.this);
              pDialog.setMessage("Iniciando Sesion. Porfavor espera...");
              pDialog.setIndeterminate(false);
              pDialog.setCancelable(true);
              pDialog.show();
          }
  
          protected String doInBackground(String... params) {
              runOnUiThread(new Runnable() {
                  public void run() {
                      int success;
                      try {
                          List&lt;NameValuePair&gt; params = new ArrayList&lt;NameValuePair&gt;();
                          params.add(new BasicNameValuePair(TAG_USERNAME, user));
                          params.add(new BasicNameValuePair(TAG_PASSWORD, pass));
  
                          JSONObject json = jsonParser.makeHttpRequest(url_login, "GET", params);
  
                          Log.d("Login", json.toString());
  
                          success = json.getInt(TAG_SUCCESS);
                          if (success == 1) {
                              JSONArray jsonArray = json.getJSONArray(TAG_OBJECT);
                              JSONObject jsonObject = jsonArray.getJSONObject(0);
  
                              user = jsonObject.getString(TAG_USERNAME);
                              pass = jsonObject.getString(TAG_PASSWORD);
                              accs = jsonObject.getString(TAG_ACCESS);
                          }else{
                              Toast.makeText(ActivityLogin.this, json.getString(TAG_MESSAGE), Toast.LENGTH_LONG).show();
                          }
                      } catch (JSONException e) {
                          e.printStackTrace();
                      }
                  }
              });
  
              return null;
          }
  
          protected void onPostExecute(String file_url) {
              pDialog.dismiss();
          }
      }
  </code></pre>
  
  <p>And the class JSONParser</p>
  
  <pre><code>public class JSONParser {
  
      static InputStream is = null;
      static JSONObject jObj = null;
      static String json = "";
  
      // constructor
      public JSONParser() {
  
      }
  
      // function get json from url
      // by making HTTP POST or GET mehtod
      public JSONObject makeHttpRequest(String url, String method, List&lt;NameValuePair&gt; params) {
  
          // Making HTTP request
          try {
  
              // check for request method
              if(method == "POST"){
                  DefaultHttpClient httpClient = new DefaultHttpClient();
                  HttpPost httpPost = new HttpPost(url);
                  httpPost.setEntity(new UrlEncodedFormEntity(params));
  
                  HttpResponse httpResponse = httpClient.execute(httpPost);
                  HttpEntity httpEntity = httpResponse.getEntity();
                  is = httpEntity.getContent();
  
              }else if(method == "GET"){
                  DefaultHttpClient httpClient = new DefaultHttpClient();
                  String paramString = URLEncodedUtils.format(params, "utf-8");
                  url += "?" + paramString;
                  HttpGet httpGet = new HttpGet(url);
  
                  HttpResponse httpResponse = httpClient.execute(httpGet);
                  HttpEntity httpEntity = httpResponse.getEntity();
                  is = httpEntity.getContent();
              }
  
          } catch (UnsupportedEncodingException e) {
              e.printStackTrace();
          } catch (ClientProtocolException e) {
              e.printStackTrace();
          } catch (IOException e) {
              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;
  
      }
  }
  </code></pre>