NoSuchMethodError

[GoogleCodeExporter]

What steps will reproduce the problem?
   UserService_Service service =new UserService_Service();
   UserService us =service.getUserServicePort();
   UserListResult result=us.getUserList("1");

What is the expected output? What do you see instead?

 java.lang.NoSuchMethodError: java.lang.String.isEmpty
at 
org.jinouts.ws.WSInvocationHandler.getWSOperationNameFromMethod(WSInvocationHand
ler.java:232)
 at org.jinouts.ws.WSInvocationHandler.getSoapBodyXML(WSInvocationHandler.java:142)
at org.jinouts.ws.WSInvocationHandler.invoke(WSInvocationHandler.java:69)
at $Proxy0.getUserList(Native Method)
 at www.niufen.com.WSDemoActivity$1.onClick(WSDemoActivity.java:38)
 at android.view.View.performClick(View.java:2408)
 at android.os.Handler.handleCallback(Handler.java:587)
 at android.os.Handler.dispatchMessage(Handler.java:92)
 at android.os.Looper.loop(Looper.java:123)
  at android.app.ActivityThread.main(ActivityThread.java:4627)
 at java.lang.reflect.Method.invokeNative(Native Method)
 at java.lang.reflect.Method.invoke(Method.java:521)
 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
 at dalvik.system.NativeStart.main(Native Method)

What version of the product are you using? On what operating system?
android 2.2

Please provide any additional information below.

Original issue reported on code.google.com by jvhuawei...@gmail.com on 22 Aug 2012 at 3:32