title: AsyncTask ; doInbackground() not called after calling method onPreExecute()
body: <p>I did added async library at my project and checked already, I don't know why code flow doesn't go in to asynctask</p>
  
  <p>Code</p>
  
  <pre><code>public void doMysql()
  {
      Log.v("doMysql", "accessed");
  
      new AsyncTask&lt;Void, Void, String&gt;() {
          @Override
          protected void onPreExecute() {
              super.onPreExecute();
              Log.e("AsyncTask", "onPreExecute");
          }
          @Override
          protected String doInBackground(Void... params) {
              Log.v("AsyncTask", "doInBackground");
  
              String msg = "";
  
              DefaultHttpClient httpclient = new DefaultHttpClient();
              HttpPost httppost = new HttpPost("http://172.16.100.172:52273/mysql");
  
              ArrayList&lt;NameValuePair&gt; nameValuePairs = new ArrayList&lt;NameValuePair&gt;();
  
              nameValuePairs.add(new BasicNameValuePair("myday", Integer.toString(day_picker.getYear()) + 
                      addZero(day_picker.getMonth() + 1) + 
                      addZero(day_picker.getDayOfMonth())));
              nameValuePairs.add(new BasicNameValuePair("mystar", changeStar(day_picker.getMonth() + 1, day_picker.getDayOfMonth())));
              nameValuePairs.add(new BasicNameValuePair("mybt", changeBloodType(blood_picker.getValue())));
              nameValuePairs.add(new BasicNameValuePair("mynum", "" + myPhone.getText()));
              nameValuePairs.add(new BasicNameValuePair("yournum", "" + partnerPhone.getText()));
              nameValuePairs.add(new BasicNameValuePair("myregID", regid));
              try {
                  Log.v("setEntity", "before");
                  httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                  Log.v("setEntity", "after");
  
              } catch (UnsupportedEncodingException e1) {
                  Log.v("UnsupportedEncodingException", "");
                  e1.printStackTrace();
              }
              //172.16.101.28
              try {  
                  Log.v("post", "before");
                  HttpResponse httpresponse = httpclient.execute(httppost);
                  Log.v("post", "after");
                  Log.v("HttpResponse ",httpresponse.getEntity().toString());
              } catch (ClientProtocolException e) {
                  Log.v("ClientProtocolException", "ClientProtocolException");
                  e.printStackTrace();
              } catch (IOException e) {
                  Log.v("IOException", "IOException");
  
                  e.printStackTrace();
              }
  
              return msg;
          }
          @Override
          protected void onPostExecute(String msg) {
              Log.v("AsyncTask", "onPostExecute");
  
          }
      }.execute(null, null, null);
  }
  </code></pre>
  
  <p>I have a log statement in the code 'Log.v("AsyncTask", "doInBackground");'</p>
  
  <p>But it doesn't show up in the logger 'Log.v("AsyncTask", "doInBackground");'</p>