Android的KSOAP2 ServiceConnectionSE NullPointerExce

我尝试实施KSOAP2在我的Android应用程序，现在即时通讯有问题。当我使用HTTPTransportSE对象即时得到以下异常的呼叫方法：

10-04 09:24:05.997: W/System.err(6779): java.lang.NullPointerException
10-04 09:24:06.017: W/System.err(6779):     at org.ksoap2.transport.ServiceConnectionSE.getResponseProperties(ServiceConnectionSE.java:85)
10-04 09:24:06.017: W/System.err(6779):     at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:167)
10-04 09:24:06.017: W/System.err(6779):     at com.brandmakerandroid.mediapool.LoginActivity.Login(LoginActivity.java:123)
10-04 09:24:06.017: W/System.err(6779):     at java.lang.reflect.Method.invokeNative(Native Method)
10-04 09:24:06.017: W/System.err(6779):     at java.lang.reflect.Method.invoke(Method.java:511)
10-04 09:24:06.017: W/System.err(6779):     at android.view.View$1.onClick(View.java:3077)
10-04 09:24:06.017: W/System.err(6779):     at android.view.View.performClick(View.java:3549)
10-04 09:24:06.017: W/System.err(6779):     at android.view.View$PerformClick.run(View.java:14400)
10-04 09:24:06.017: W/System.err(6779):     at android.os.Handler.handleCallback(Handler.java:605)
10-04 09:24:06.017: W/System.err(6779):     at android.os.Handler.dispatchMessage(Handler.java:92)
10-04 09:24:06.017: W/System.err(6779):     at android.os.Looper.loop(Looper.java:154)
10-04 09:24:06.017: W/System.err(6779):     at android.app.ActivityThread.main(ActivityThread.java:4945)
10-04 09:24:06.017: W/System.err(6779):     at java.lang.reflect.Method.invokeNative(Native Method)
10-04 09:24:06.017: W/System.err(6779):     at java.lang.reflect.Method.invoke(Method.java:511)
10-04 09:24:06.017: W/System.err(6779):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-04 09:24:06.017: W/System.err(6779):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-04 09:24:06.017: W/System.err(6779):     at dalvik.system.NativeStart.main(Native Method)

这里是我的代码：

            SoapObject request= new SoapObject(Constants.NAMESPACE, Constants.METHOD_NAME);

            SoapObject mda = new SoapObject("","arg0");

            PropertyInfo pi = new PropertyInfo();
            pi.setName("mediaGuid");
            pi.setValue("27499");
            pi.setType(String.class);
            mda.addProperty(pi);

            PropertyInfo pi_hash = new PropertyInfo();
            pi_hash.setName("mediaHash");
            pi_hash.setValue("");
            pi_hash.setType(String.class);

            mda.addProperty(pi_hash);

            request.addSoapObject(mda);

            SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                    SoapEnvelope.VER11);
            envelope.setOutputSoapObject(request);
            envelope.addMapping(Constants.NAMESPACE, "getMediaDetails", getMediaDetails.class);

            try {
                HttpTransportSE httpTransportSE = new HttpTransportSE(Constants.DEFAULT_SERVER);
                httpTransportSE.debug = true;

                List<HeaderProperty> headerList = new ArrayList<HeaderProperty>();
                headerList.add(new HeaderProperty("Authorization", "Basic "
                        + org.kobjects.base64.Base64.encode("xxxxxxxx"
                                .getBytes())));

                httpTransportSE.call(Constants.SOAP_ACTION, envelope, headerList);

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

我希望u能帮助我..即时通讯试着修为天的错误

我解决了这个问题。有与HttpConnection的一个问题unfortunatley也不是那么容易找到它没有ksoap2来源。我检查了代码，并发现ksoap2使用从Java正常的URL和HttpConnection的。我建了一个简单的例子来连接到我的网址，发现它无法连接。

注意：首先检查简单的事情，你开始觉得复杂:)之前