android开发中使用kSOAP2出现“double ID exception”解决办法，double ID exception出错的原因。一个和webservice使用soap进行交互的应用，获取webservice返回的数据时遇到一个错误java.lang.RuntimeException: double IDouble ID exception”，百度上找不到答案，后来Google了一下，在stackOverflow上找到了解决办法，原来是webservice返回的xml数据多了一个节点<diffgr:before>，在后台处理了一下后运行正常，现把解决办法说一下。
相关代码如下：
try {
// 1、指定 WebService 的命名空间和调用方法 ;
SoapObject rpc = new SoapObject(ConstantData.NAMESPACE,
ConstantData.GETNOTICE_METHOD_NAME);
System.out.println(“1*******************”);
// 2、设置调用方法的参数值，如果没有参数，可以省略
// 3、生成调用Webservice方法的SOAP请求信息。
// 创建SoapSerializationEnvelope对象时需要通过SoapSerializationEnvelope类的构造方法设置SOAP协议的版本号。
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
SoapEnvelope.VER11);
envelope.bodyOut = rpc;
System.out.println(“2*******************”);
// 这里如果设置为TRUE,那么在服务器端将获取不到参数值(如:将这些数据插入到数据库中的话)
envelope.dotNet = true;
System.out.println(“3*******************”);
// 在创建SoapSerializationEnvelope对象后，不要忘了设置SOAPSoapSerializationEnvelope类的bodyOut属性
envelope.setOutputSoapObject(rpc);
// 4、创建HttpTransportsSE对象
NewHttpTransportSE ht = new NewHttpTransportSE(ConstantData.STU_URL);
ht.debug = true;
System.out.println(“4*******************”);
// 5、使用call方法调用WebService方法
System.out.println(“使用call方法调用WebService方法”);
ht.call(ConstantData.GETNOTICE_SOAP_ACTION, envelope, null);
System.out.println(“5*******************”);
// 6、获得WebService方法的返回结果
SoapObject response = (SoapObject) envelope.getResponse();
SoapObject detail = (SoapObject) response.getProperty(1);
SoapObject newdataset = (SoapObject) detail
.getProperty(“NewDataSet”);
SoapObject allNotice = (SoapObject) newdataset
.getProperty(“AllNotice”);
System.out.println(“response节点个数” + response.getPropertyCount());
System.out
.println(“newdataset节点个数” + newdataset.getPropertyCount());
System.out.println(“allNotice节点个数” + allNotice.getPropertyCount());
for (int i = 0; i < newdataset.getPropertyCount(); i++) {
SoapObject soapChilds = (SoapObject) newdataset.getProperty(i);
String postID = soapChilds.getProperty(“postID”).toString();
String postTitle = soapChilds.getProperty(“postTitle”)
.toString();
String postContent=soapChilds.getProperty(“postContent”).toString();
String postDate = soapChilds.getProperty(“postDate”).toString();
String postPersonName = soapChilds
.getProperty(“postPersonName”).toString();
String postContentText = soapChilds.getProperty(
“postContentText”).toString();
noticeMap = new HashMap<String, String>(); // 存放到MAP里面
noticeMap.put(“postID”, postID);
noticeMap.put(“postTitle”, postTitle);
noticeMap.put(“postContent”, postContent);
noticeMap.put(“postDate”, postDate);
noticeMap.put(“postPersonName”, postPersonName);
noticeMap.put(“postContentText”, postContentText);
System.out.println(postID);
System.out.println(postTitle);
System.out.println(postDate);
System.out.println(postPersonName);
System.out.println(postContentText);
noticelist.add(noticeMap);
}
// System.out.println(allNotice);
} catch (IOException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
}
Exception
java.lang.RuntimeException: double ID
at org.ksoap2.serialization.SoapSerializationEnvelope.read(SoapSerializationEnvelope.java:407)
at org.ksoap2.serialization.SoapSerializationEnvelope.readUnknown(SoapSerializationEnvelope.java:273)
at org.ksoap2.serialization.SoapSerializationEnvelope.read(SoapSerializationEnvelope.java:389)
at org.ksoap2.serialization.SoapSerializationEnvelope.readUnknown(SoapSerializationEnvelope.java:273)
at org.ksoap2.serialization.SoapSerializationEnvelope.read(SoapSerializationEnvelope.java:389)
at org.ksoap2.serialization.SoapSerializationEnvelope.readUnknown(SoapSerializationEnvelope.java:273)
at org.ksoap2.serialization.SoapSerializationEnvelope.read(SoapSerializationEnvelope.java:389)
at org.ksoap2.serialization.SoapSerializationEnvelope.readUnknown(SoapSerializationEnvelope.java:273)
at org.ksoap2.serialization.SoapSerializationEnvelope.read(SoapSerializationEnvelope.java:389)
at org.ksoap2.serialization.SoapSerializationEnvelope.parseBody(SoapSerializationEnvelope.java:151)
at org.ksoap2.SoapEnvelope.parse(SoapEnvelope.java:140)
at org.ksoap2.transport.Transport.parseResponse(Transport.java:116)
at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:235)
at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:114)
at com.menthatech.soap_login_test.SampleSoapTest_LoginActivity.onClick(SampleSoapTest_LoginActivity.java:94)
at android.view.View.performClick(View.java:2408)
at android.view.View$PerformClick.run(View.java:8816)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)
“double ID exception”解决办法：
remove the <diffgr:before> tag and its inner contents.
http://stackoverflow.com/questions/6073129/how-to-remove-diffgrbefore-content-from-returned-dataset-via-webservice