Android 向量上的Ksoap响应分析错误

我有一个soap Web服务和一个用于调用服务的android应用程序。该应用程序始终正常工作，但在上次Web服务更新之后，出现了一些问题。webservice的更新只是为了删除一些未使用的服务。其他代码没有被修改。 我的android应用程序使用AsyncTask调用服务并返回结果：

public class DownloadDataTask extends AsyncTask<Void, Void, Vector<SoapObject>> {
private static String METHOD_NAME = "getData";
private static String SOAP_ACTION = "http://example.com/getData";
private static String URL = "http://arduino-data-server.appspot.com/dataserver";
private static String NAMESPACE = "http://example.com/";

@SuppressWarnings("unchecked")
@Override
protected Vector<SoapObject> doInBackground(Void... arg0) {
    try {
        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                SoapEnvelope.VER11);
        envelope.setOutputSoapObject(request);
        HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);

        androidHttpTransport.call(SOAP_ACTION, envelope);
        Vector<SoapObject> result = (Vector<SoapObject>) envelope.getResponse();

        return result;
    } catch (IOException e) {
        e.printStackTrace();
    } catch (XmlPullParserException e) {
        e.printStackTrace();
    }
    return null;
}

其中第49行是调用getResult（）方法的行

怎么了？

原因很清楚：

    Caused by: java.lang.ClassCastException: org.ksoap2.serialization.SoapObject 
cannot be cast to java.util.Vector

在此行中，不能将结果SoapObject强制转换为矢量：

Vector<SoapObject> result = (Vector<SoapObject>) envelope.getResponse();

Vector<SoapObject> result = (Vector<SoapObject>) envelope.getResponse();

SoapObject result = (SoapObject) envelope.getResponse();