title: Convert null object to String
body: <p>I have written an android program to load values to table-row from web service. But value comes null so I need to convert it into a string. Can someone tell me the method to do it?</p>
  
  <pre><code>try{                    
  
      SoapObject request = service.getRequest();
      SoapSerializationEnvelope envelope = service.getEnvelope(request);
      SoapObject response = service.getResponse(envelope);
      Log.i("Service Master", response.toString());
      int count = response.getPropertyCount();
      for (int i = 0; i &lt; count; i++) {
          SoapObject result = (SoapObject) response.getProperty(i);
          DeleteuserDetails deleteuserDetails=new DeleteuserDetails();
          deleteuserDetails.setUserId(result.getPropertyAsString(4));
          deleteuserDetails.setUserName(result.getPropertyAsString(2));
          deleteuserDetails.setUserRole(result.getPropertyAsString(3));
          deleteuserDetails.setCreatedDate(result.getPropertyAsString(1));
          deleteuserDetails.setCreatedBy(result.getPropertyAsString(0));
          userdetail.add(deleteuserDetails);
      }
  </code></pre>
  
  <p>Now <code>deleteuserDetails.setCreatedBy(result.getPropertyAsString(0));</code> gets null value from webservice, so I need to convert it into  string <code>"null"</code>.</p>
  
  <p><strong>LogCat:</strong></p>
  
  <pre><code>12-20 18:48:52.608: W/System.err(2174): java.lang.NullPointerException
  12-20 18:48:52.608: W/System.err(2174):     at org.ksoap2.serialization.SoapObject.getPropertyAsString(SoapObject.java:165)
  12-20 18:48:52.608: W/System.err(2174):     at com.mvss.admin.Deleteuser$deteUserIdLoad.doInBackground(Deleteuser.java:81)
  12-20 18:48:52.608: W/System.err(2174):     at com.mvss.admin.Deleteuser$deteUserIdLoad.doInBackground(Deleteuser.java:1)
  12-20 18:48:52.608: W/System.err(2174):     at android.os.AsyncTask$2.call(AsyncTask.java:185)
  12-20 18:48:52.608: W/System.err(2174):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
  12-20 18:48:52.608: W/System.err(2174):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
  12-20 18:48:52.608: W/System.err(2174):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
  12-20 18:48:52.608: W/System.err(2174):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
  12-20 18:48:52.608: W/System.err(2174):     at java.lang.Thread.run(Thread.java:1096)
  </code></pre>