Webservice在android冰淇淋三明治中不起作用（api 15）

我试图通过KSOAP（2.5.8）调用公共web服务。但它无法从冰淇淋三明治版本的服务中获取数据。它在2.2和2.3这样的低版本中工作正常。 这是我的密码

import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;

import android.util.Log;

public class WebService {

private final String NAMESPACE ="http://aaaaaa.org/";   
private final String URL ="http://5xxxxxxxxxxx.asmx?WSDL";






    public boolean checkUser(String _EmailID, String _Password) {


        boolean result = false; 

        final String SOAP_ACTION ="http://aaaaaaaa/Login";
        final String METHOD_NAME = "Login";

              SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

        PropertyInfo propertyInfoEmail = new PropertyInfo();
        propertyInfoEmail.setName("_EmailID");
        propertyInfoEmail.setValue(_EmailID);
        propertyInfoEmail.setType(String.class);
        request.addProperty(propertyInfoEmail);

        PropertyInfo propertyInfoPassword = new PropertyInfo();
        propertyInfoPassword.setName("_Password");
        propertyInfoPassword.setValue(_Password);
        propertyInfoPassword.setType(String.class);
        request.addProperty(propertyInfoPassword);

         SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
            envelope.dotNet = true; // put this only if the web service is .NET one
            envelope.setOutputSoapObject(request);
            HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);

        try {
            androidHttpTransport.call(SOAP_ACTION, envelope);
            SoapPrimitive response = (SoapPrimitive)envelope.getResponse();
            Log.i("myApp", response.toString());
            if(response.toString().equalsIgnoreCase("true")){
                result = true;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    } 

---

每次它在冰淇淋三明治中返回错误结果。它不会在错误日志中显示任何内容。我应该在这里换什么。请帮帮我。

问题是ICS不允许你在活动中做一些网络工作。这意味着您必须将对web服务的调用放在后台任务（AsyncTask）中。在该链接中，您可以看到要执行的操作：

在连接到web服务时，接受您以前提出的问题的答案和任何错误OK。连接时没有错误。