AsyncTask call webservice data reported null pointer

 package Telephone.test; 
import java.io.IOException; 
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 

import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 
import org.ksoap2.SoapEnvelope; 
import org.ksoap2.serialization.SoapObject; 
import org.ksoap2.serialization.SoapSerializationEnvelope; 
import org.ksoap2.transport.HttpTransportSE; 
import org.xmlpull.v1.XmlPullParserException; 
import android.app.Activity; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.ListView; 
import android.widget.SimpleAdapter; 
import android.widget.Toast; 
public class TelephoneActivity extends Activity {
/ ** Called when the activity is first created. * / 
private EditText usernameEditText; 
private Button queryButton; 
private ListView newslist; 

public void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState); 
setContentView (R.layout.main); 

usernameEditText = (EditText) findViewById (R.id.phone_sec); 
final ListView newslist = (ListView) findViewById (R.id.listview); 
queryButton = (Button) findViewById (R.id.query_btn); 
queryButton.setOnClickListener (new OnClickListener () {
public void onClick (View v) {
String username = usernameEditText.getText () toString () trim ();.. 
PageTask task = new PageTask (); 
task.execute (username); 
} 
}); 

newslist.setOnItemClickListener (new OnItemClickListener () {

@ SuppressWarnings ("unchecked") 
public void onItemClick (AdapterView  parent, View view, int position, long id) {
ListView listView = (ListView) parent; 
HashMap  map = (HashMap ) listView.getItemAtPosition (position); 
String userid = map.get ("tasktitle"); 

. Toast.makeText (TelephoneActivity.this, userid + "", Toast.LENGTH_LONG) show (); 
} 
}); 
} 

class PageTask extends AsyncTask  >> {


@ Override 
protected List > doInBackground (String. .. params) {

List > newslist2 = new ArrayList > (); 

/ / Namespace 
String nameSpace = "http://tempuri.org/"; 
/ / Method name 
 callString methodName = "GetTaskUserName"; 
/ / EndPoint 
String endPoint = "http://192.168.0.100:8081/WebService.asmx"; 
/ / SOAP Action 
String soapAction = "http://tempuri.org/GetTaskUserName"; 
/ / Specify WebService namespace and method name to call 
SoapObject rpc = new SoapObject (nameSpace, methodName); 
/ / Set the required incoming call WebService interface requires two parameters mobileCode, userId 
rpc.addProperty ("username", params [0]); 
/ / Generate method call WebService SOAP request message, and specify the version of SOAP 
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope (SoapEnvelope.VER12); 
envelope.bodyOut = rpc; 
/ / Set whether the call is dotNet development WebService 
envelope.dotNet = true; 
envelope.setOutputSoapObject (rpc); 
HttpTransportSE transport = new HttpTransportSE (endPoint); 
transport.debug = true; 
try {
transport.call (soapAction, envelope); 
} Catch (IOException e) {
/ / TODO Auto-generated catch block 
e.printStackTrace (); 
} Catch (XmlPullParserException e) {
/ / TODO Auto-generated catch block 
e.printStackTrace (); 
} 
/ / Get the returned data 
SoapObject object = (SoapObject) envelope.bodyIn; 
String result = object.getProperty (0) toString ();. 
JSONObject demoJson = null; 
try {
demoJson = new JSONObject (result); 
} Catch (JSONException e) {
/ / TODO Auto-generated catch block 
e.printStackTrace (); 
} 
JSONArray numberList = null; 
try {
numberList = demoJson.getJSONArray ("T1"); 
} Catch (JSONException e) {
/ / TODO Auto-generated catch block 
e.printStackTrace (); 
} 
for (int i = 0; i {
HashMap  hashMap = new HashMap  (); 
try {
hashMap.put ("tasktitle", numberList.getJSONObject (i) getString ("TaskTitle").); 
} Catch (JSONException e) {
/ / TODO Auto-generated catch block 
e.printStackTrace (); 
} 
newslist2.add (hashMap); 
} 
return newslist2; 
} 

@ Override 
protected void onPostExecute (List > result) {
SimpleAdapter newslistAdapter = new SimpleAdapter (TelephoneActivity.this, result, R.layout.item, new String [] {"tasktitle"}, new int [] {R.id.task_title}); 
newslist.setAdapter (newslistAdapter); 
super.onPostExecute (result); 
} 
} 



} 

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Reply:
No one knows yet
Reply:
http://192.168.0.100:8081/ can visit?
Reply:
After connecting, see how much return response codes