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POandroid.os.NetworkOnMainThreadException for webservice (ksoap)
 

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    <p>I am new to android programming and trying to use webservice in this sample program:</p> <p>I use Android 4.1 and my IDE is Eclipse Juno. I think the programming part is ok, but may be there is a problem about connecting. </p> <pre><code>package com.example.webserviceexample; import java.io.IOException; 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.app.Activity; import android.os.Bundle; import android.view.Menu; 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 { final static String NAMESPACE = "http://tempuri.org/"; final static String METHOD_NAME = "CelsiusToFahrenheit"; final static String SOAP_ACTION = "http://tempuri.org/CelsiusToFahrenheit"; final static String URL = "http://www.w3schools.com/webservices/tempconvert.asmx"; TextView sonuc; EditText deger; Button hesapla; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); deger = (EditText) findViewById(R.id.deger); sonuc = (TextView) findViewById(R.id.flag); hesapla = (Button) findViewById(R.id.hesapla); hesapla.setOnClickListener(new OnClickListener() { public void onClick(View v) { //request info SoapObject Request = new SoapObject(NAMESPACE, METHOD_NAME); Request.addProperty("Celcius",deger.getText().toString()); //envelope SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope(SoapEnvelope.VER11); soapEnvelope.dotNet = true; //.NET = true, php = false //putting request to the envelope soapEnvelope.setOutputSoapObject(Request); //transferring data HttpTransportSE aht = new HttpTransportSE(URL); //prepare //start try { aht.call(SOAP_ACTION, soapEnvelope); } catch (IOException e) { e.printStackTrace(); } catch (XmlPullParserException e) { e.printStackTrace(); } //waiting and getting response. String result; try { // we are creating SoapPrimitive Object as waiting for simple variable. result = "Fahrenheit:" + soapEnvelope.getResponse(); //writing the result to the textView sonuc.setText(result); } catch (SoapFault e) { e.printStackTrace(); } } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_main, menu); return true; } } </code></pre> <p>However, I get this error:</p> <pre><code>08-15 11:45:26.294: E/AndroidRuntime(641): FATAL EXCEPTION: main 08-15 11:45:26.294: E/AndroidRuntime(641): android.os.NetworkOnMainThreadException 08-15 11:45:26.294: E/AndroidRuntime(641): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117) 08-15 11:45:26.294: E/AndroidRuntime(641): at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 08-15 11:45:26.294: E/AndroidRuntime(641): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 08-15 11:45:26.294: E/AndroidRuntime(641): at java.net.InetAddress.getAllByName(InetAddress.java:214) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnection.&lt;init&gt;(HttpConnection.java:70) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnection.&lt;init&gt;(HttpConnection.java:50) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpEngine.connect(HttpEngine.java:310) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239) 08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80) 08-15 11:45:26.294: E/AndroidRuntime(641): at org.ksoap2.transport.ServiceConnectionSE.connect(ServiceConnectionSE.java:76) 08-15 11:45:26.294: E/AndroidRuntime(641): at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:146) 08-15 11:45:26.294: E/AndroidRuntime(641): at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:95) 08-15 11:45:26.294: E/AndroidRuntime(641): at com.example.webserviceexample.MainActivity$1.onClick(MainActivity.java:61) 08-15 11:45:26.294: E/AndroidRuntime(641): at android.view.View.performClick(View.java:4084) 08-15 11:45:26.294: E/AndroidRuntime(641): at android.view.View$PerformClick.run(View.java:16966) 08-15 11:45:26.294: E/AndroidRuntime(641): at android.os.Handler.handleCallback(Handler.java:615) 08-15 11:45:26.294: E/AndroidRuntime(641): at android.os.Handler.dispatchMessage(Handler.java:92) 08-15 11:45:26.294: E/AndroidRuntime(641): at android.os.Looper.loop(Looper.java:137) 08-15 11:45:26.294: E/AndroidRuntime(641): at android.app.ActivityThread.main(ActivityThread.java:4745) 08-15 11:45:26.294: E/AndroidRuntime(641): at java.lang.reflect.Method.invokeNative(Native Method) 08-15 11:45:26.294: E/AndroidRuntime(641): at java.lang.reflect.Method.invoke(Method.java:511) 08-15 11:45:26.294: E/AndroidRuntime(641): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 08-15 11:45:26.294: E/AndroidRuntime(641): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 08-15 11:45:26.294: E/AndroidRuntime(641): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>So what can be the problem?</p>
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    1. COYou can refer this question. [android-os-networkonmainthreadexception-for-webservice-ksoap][1] [1]: http://stackoverflow.com/questions/8322057/android-os-networkonmainthreadexception-exception-while-trying-to-call-a-webserv
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