android web service connection problem

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I have a problem with my project and here is my mainavtivity java

Java

package com.example.tut2;

import java.io.IOException;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.SoapFault;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;
import android.os.AsyncTask;
import android.app.ProgressDialog;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

// web service ile bağlantı kurmak için gerekli parametreleri burada
// ayarlıyoruz.


//final static String NAMESPACE = "http://www.w3schools.com/webservices/";
	final static String NAMESPACE = "http://192.168.1.3/";

final static String METHOD_NAME = "Add";
//final static String METHOD_NAME = "CelsiusToFahrenheit";

//final static String SOAP_ACTION = "http://www.w3schools.com/webservices/CelsiusToFahrenheit";
final static String SOAP_ACTION = "http://192.168.1.3/Add";

//final static String URL = "http://www.w3schools.com/webservices/tempconvert.asmx";
final static String URL = "http://10.0.2.2:32772/Service1.asmx";

private TextView sonuc;
private EditText deger;
private Button hesapla;
private String x;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Kullanacağımız layout u burada gösteriyoruz.
this.setContentView(R.layout.activity_main);
// Layout elemanlarını gösteriyoruz.
deger = (EditText) findViewById(R.id.deger);
sonuc = (TextView) findViewById(R.id.flag);
hesapla = (Button) findViewById(R.id.hesapla);
// Edittext den alınan derecenin ,hesapla butonuna tıklandığında
// Fahrenheit değerine dönüşmesini istiyoruz.
hesapla.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {

	new asyncTaskOrnek().execute();
}
});

}
public class asyncTaskOrnek extends AsyncTask<String,String,String>{
	private ProgressDialog dialog = new ProgressDialog(MainActivity.this);
	
	@Override
    protected void onPreExecute() {
           dialog.setMessage("Yükleniyor...");
          dialog.show();
}
	protected String doInBackground(String... params) {
		
		SoapObject Request = new SoapObject(NAMESPACE, METHOD_NAME);
		PropertyInfo celsuiusPI= new PropertyInfo();
        celsuiusPI.setName("a");
        celsuiusPI.setValue(deger.getText().toString());
        celsuiusPI.setType(String.class);
        Request.addProperty(celsuiusPI);
	
		//Request.addProperty("Celsius", deger.getText().toString());
	
		SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope(
		SoapEnvelope.VER11);
		
		soapEnvelope.dotNet = true;
	
		soapEnvelope.setOutputSoapObject(Request);
		
		HttpTransportSE aht = new HttpTransportSE(URL);
		try {
		// Ve son olarak isteğimizi gönderiyoruz.
		aht.call(SOAP_ACTION, soapEnvelope);
		} catch (IOException e) {
		e.printStackTrace();
		} catch (XmlPullParserException e) {
		e.printStackTrace();
		}
		String result;
		try {
		// Cevap olarak basit bir veri tipi beklediğimiz için,
		// cevabı SoapPrimitive nesnesi olarak alıyoruz.
		result = "Fahrenheit:"
		+ (SoapPrimitive) soapEnvelope.getResponse();
		// Aldığımız cevabı sonuc textview üzerine yazıyoruz.
		x=result;
		} catch (SoapFault e) {
		e.printStackTrace();
		}
		return x;
        
        
}
	protected void onPostExecute(String a){
          sonuc.setText(a);
          dialog.dismiss();
}
	
}
}

and here is web service

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;

namespace WebService3
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://192.168.1.3/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
    // [System.Web.Script.Services.ScriptService]
    public class Service1 : System.Web.Services.WebService
    {
        [WebMethod]
        public String Add(String a)
        {
            return "68";
        }
    }
}

and here is my logcat output

01-03 05:08:27.329: W/System.err(1190): org.xmlpull.v1.XmlPullParserException: expected: START_TAG {http://schemas.xmlsoap.org/soap/envelope/}Envelope (position:START_TAG <HTML>@2:7 in java.io.InputStreamReader@b4e427a0) 
01-03 05:08:27.329: W/System.err(1190): 	at org.kxml2.io.KXmlParser.require(KXmlParser.java:2056)
01-03 05:08:27.339: W/System.err(1190): 	at org.ksoap2.SoapEnvelope.parse(SoapEnvelope.java:127)
01-03 05:08:27.339: W/System.err(1190): 	at org.ksoap2.transport.Transport.parseResponse(Transport.java:63)
01-03 05:08:27.339: W/System.err(1190): 	at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:100)
01-03 05:08:27.339: W/System.err(1190): 	at com.example.tut2.MainActivity$asyncTaskOrnek.doInBackground(MainActivity.java:96)
01-03 05:08:27.339: W/System.err(1190): 	at com.example.tut2.MainActivity$asyncTaskOrnek.doInBackground(MainActivity.java:1)
01-03 05:08:27.339: W/System.err(1190): 	at android.os.AsyncTask$2.call(AsyncTask.java:288)
01-03 05:08:27.339: W/System.err(1190): 	at java.util.concurrent.FutureTask.run(FutureTask.java:237)
01-03 05:08:27.339: W/System.err(1190): 	at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
01-03 05:08:27.339: W/System.err(1190): 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
01-03 05:08:27.339: W/System.err(1190): 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
01-03 05:08:27.339: W/System.err(1190): 	at java.lang.Thread.run(Thread.java:841)
01-03 05:08:27.529: W/dalvikvm(1190): threadid=12: thread exiting with uncaught exception (group=0xb4adeba8)
01-03 05:08:28.849: E/AndroidRuntime(1190): FATAL EXCEPTION: AsyncTask #2
01-03 05:08:28.849: E/AndroidRuntime(1190): Process: com.example.tut2, PID: 1190
01-03 05:08:28.849: E/AndroidRuntime(1190): java.lang.RuntimeException: An error occured while executing doInBackground()
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at android.os.AsyncTask$3.done(AsyncTask.java:300)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at java.util.concurrent.FutureTask.run(FutureTask.java:242)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at java.lang.Thread.run(Thread.java:841)
01-03 05:08:28.849: E/AndroidRuntime(1190): Caused by: java.lang.NullPointerException
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at org.ksoap2.serialization.SoapSerializationEnvelope.getResponse(SoapSerializationEnvelope.java:513)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at com.example.tut2.MainActivity$asyncTaskOrnek.doInBackground(MainActivity.java:107)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at com.example.tut2.MainActivity$asyncTaskOrnek.doInBackground(MainActivity.java:1)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at android.os.AsyncTask$2.call(AsyncTask.java:288)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	at java.util.concurrent.FutureTask.run(FutureTask.java:237)
01-03 05:08:28.849: E/AndroidRuntime(1190): 	... 4 more
01-03 05:08:36.509: E/WindowManager(1190): android.view.WindowLeaked: Activity com.example.tut2.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{b4dc9ec8 V.E..... R.....ID 0,0-228,72} that was originally added here
01-03 05:08:36.509: E/WindowManager(1190): 	at android.view.ViewRootImpl.<init>(ViewRootImpl.java:348)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:248)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.app.Dialog.show(Dialog.java:286)
01-03 05:08:36.509: E/WindowManager(1190): 	at com.example.tut2.MainActivity$asyncTaskOrnek.onPreExecute(MainActivity.java:73)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.os.AsyncTask.execute(AsyncTask.java:535)
01-03 05:08:36.509: E/WindowManager(1190): 	at com.example.tut2.MainActivity$1.onClick(MainActivity.java:62)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.view.View.performClick(View.java:4438)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.view.View$PerformClick.run(View.java:18422)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.os.Handler.handleCallback(Handler.java:733)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.os.Handler.dispatchMessage(Handler.java:95)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.os.Looper.loop(Looper.java:136)
01-03 05:08:36.509: E/WindowManager(1190): 	at android.app.ActivityThread.main(ActivityThread.java:5017)
01-03 05:08:36.509: E/WindowManager(1190): 	at java.lang.reflect.Method.invokeNative(Native Method)
01-03 05:08:36.509: E/WindowManager(1190): 	at java.lang.reflect.Method.invoke(Method.java:515)
01-03 05:08:36.509: E/WindowManager(1190): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
01-03 05:08:36.509: E/WindowManager(1190): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
01-03 05:08:36.509: E/WindowManager(1190): 	at dalvik.system.NativeStart.main(Native Method)

Is there anyone who can help me?

Posted 2-Jan-14 23:14pm

Hasan Çakır

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tabrej · Answer 1 · 2014-01-05T05:27:00

There are two three issues with your code.

1. In MainActivity.java in asyncTaskOrnek, doInBackground() method line#107 there is a null pointer exception.

2. In case of exception you are not closing aht object

3. Check this tutorial to learn how to use Dialog box in an Async Task http://www.techrepublic.com/blog/software-engineer/androids-indeterminate-progressdialog-tutorial/[^]