Question

我有一个soap webservice和一个用于调用服务的android应用程序。应用程序始终有效，但在上次webservice更新后出现问题。 webservice的更新仅用于删除一些未使用的服务。其他代码未修改。我的android应用程序使用AsyncTask来调用服务并获取结果：

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;
}

但我得到了后续错误：

10-11 18:36:25.063: E/AndroidRuntime(9250): FATAL EXCEPTION: AsyncTask #1
10-11 18:36:25.063: E/AndroidRuntime(9250): java.lang.RuntimeException: An error occured while executing doInBackground()
10-11 18:36:25.063: E/AndroidRuntime(9250):     at android.os.AsyncTask$3.done(AsyncTask.java:299)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at java.util.concurrent.FutureTask.run(FutureTask.java:239)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at java.lang.Thread.run(Thread.java:841)
10-11 18:36:25.063: E/AndroidRuntime(9250): Caused by: java.lang.ClassCastException: org.ksoap2.serialization.SoapObject cannot be cast to java.util.Vector
10-11 18:36:25.063: E/AndroidRuntime(9250):     at com.example.soapclient.DownloadDataTask.doInBackground(DownloadDataTask.java:49)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at com.example.soapclient.DownloadDataTask.doInBackground(DownloadDataTask.java:1)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at android.os.AsyncTask$2.call(AsyncTask.java:287)
10-11 18:36:25.063: E/AndroidRuntime(9250):     at java.util.concurrent.FutureTask.run(FutureTask.java:234)
10-11 18:36:25.063: E/AndroidRuntime(9250):     ... 4 more

其中第49行是我调用getResult（）方法的行。

出了什么问题？

Answer 1

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，您无法将结果SoapObject强制转换为Vector：

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

试试这个：

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

Ksoap响应解析Vector上的错误

1 个答案: