ถามเรื่อง Android ดึงราคาน้ำมัน Web Service จาก pttplc จากกระทู้ก่อนหน้านี้

package com.example.pttoil;

import java.io.StringReader;
import java.util.ArrayList;

import org.kobjects.util.Strings;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParser;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.util.Xml;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Adapter;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

public class MainActivity extends Activity {
	private ListView ListXML;
	private ArrayAdapter<String> AdapterXML;
	private ArrayList<String> ListitemXML = new ArrayList<String>();
	
	private Button GetWebServiceXML;
	
	private SoapPrimitive Results = null;
	
	private static String URL = "http://www.pttplc.com/webservice/pttinfo.asmx";
	private static String NAMESPACE = "http://www.pttplc.com/ptt_webservice/";
	private static String METHOD_NAME = "CurrentOilPrice";
	private static String SOAP_ACTION = "http://www.pttplc.com/ptt_webservice/CurrentOilPrice";
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        GetWebServiceXML = (Button) findViewById(R.id.getWebServiceXML);
        ListXML= (ListView) findViewById(R.id.listXML);
        
        GetWebServiceXML.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				GetResponseXML();
			}
		});
        
    }
    
    public void GetResponseXML() {
    	Thread s = new Thread() {
    		
    		@Override
    		public void run() {

    			try {
    				
    				SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
    				request.addProperty("Language", "TH");
    				
    				SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
    				envelope.dotNet = true;
    				envelope.setOutputSoapObject(request);
    				
    				HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
					androidHttpTransport.call(SOAP_ACTION, envelope);
					SoapPrimitive resultRequestSOAP = (SoapPrimitive)envelope.getResponse();
					Results = resultRequestSOAP;
					
				} catch (Exception e) {
					Log.e("Error", "="+e.getMessage());
					// TODO: handle exception
					Results= null;
				} finally {
					if(Results == null) {
						Log.e("WebServiceExample", "Soap object Error");
				
					} else {
						pareser();
					
					}
				}
    			
    		}
    	};
    	s.start();
    }
    
    public void pareser() {
    	
    	ListitemXML.add(Results.toString());
    	Listing();

    }
    
    public void Listing() {
    	Runnable run = new Runnable() {
			
			@Override
			public void run() {
				// TODO Auto-generated method stub
				AdapterXML = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1,
						ListitemXML);
				AdapterXML.notifyDataSetChanged();
				ListXML.setAdapter(AdapterXML);
			}
		};
		this.runOnUiThread(run);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}