Web Service Android Application : Cannot serialize 1.0 -

p.s : have looked @ similar questions haven't been able understand do. talk using marshal class, can't seem understand.

i creating android application consume jax-ws. using ksoap-2 library same.

i take inputs user in series of text fields , pass these onto webservice activity.
here in oncreate method call web service after setting soap object :

protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      // message intent     intent intent = getintent();     bundle extras = intent.getextras();     string cropname = extras.getstring(androidwsclient.crop_name);     float area = extras.getfloat(androidwsclient.area); 

similarly names of fertilizers , add them arraylist called fertilizerlist. 3 more values in similar manner.

soapobject request = new soapobject(namespace, method_name);      // add parameters soap object     // cropname     propertyinfo propinfo = new propertyinfo();     propinfo.name = "cropname";     propinfo.type = propertyinfo.string_class;     request.addproperty(propinfo, cropname);     system.out.println("!!!! success cropname !!!");     // area     propinfo = new propertyinfo();     propinfo.setname("area");     propinfo.settype(double.class);     request.addproperty(propinfo, area);     system.out.println("!!!! success area !!!");     // fertilizerlist     propinfo = new propertyinfo();     propinfo.setname("fertilizerlist");     propinfo.settype(arraylist.class);     request.addproperty(propinfo, fertilizerlist);     system.out.println("!!!! success fertilizerlist !!!");     // n value     propinfo = new propertyinfo();     propinfo.setname("nitrogen");     propinfo.settype(integer.class);     request.addproperty(propinfo, n);     system.out.println("!!!! success n !!!"); 

here create soap object , properties it.
i need pass multiple parameters web service, order in add these properties order in they'll appear parameters web service, right ?
send out request web service :

// send out request web service     soapserializationenvelope envelope = new soapserializationenvelope(soapenvelope.ver11);     system.out.println("created envelope!");     envelope.setoutputsoapobject(request);     system.out.println("reached set output object");     httptransportse androidhttptransport = new httptransportse(url);     system.out.println("reached httptransport layer");     try {         androidhttptransport.call(soap_action, envelope);         soapprimitive resultsrequestsoap = (soapprimitive) envelope.getresponse();         textview textview = new textview(this);         textview.settextsize(40);         system.out.println(resultsrequestsoap.tostring());         textview.settext(resultsrequestsoap.tostring());         // set text view activity layout         setcontentview(textview);     } catch (exception e) {         e.printstacktrace();     }  

here output logcat :

   07-11 05:37:32.782: i/system.out(1698): !!!! success cropname !!!     07-11 05:37:32.782: i/system.out(1698): !!!! success area !!!     07-11 05:37:32.792: i/system.out(1698): !!!! success fertilizerlist !!!     07-11 05:37:32.792: i/system.out(1698): !!!! success n !!!     07-11 05:37:32.872: i/system.out(1698): created envelope!     07-11 05:37:32.872: i/system.out(1698): reached set output object     07-11 05:37:32.912: i/system.out(1698): reached httptransport layer     07-11 05:37:33.012: w/system.err(1698): java.lang.runtimeexception: cannot serialize: 1.0     07-11 05:37:33.012: w/system.err(1698):     @ org.ksoap2.serialization.soapserializationenvelope.writeelement(soapserializationenvelope.java:629)     07-11 05:37:33.022: w/system.err(1698):     @ org.ksoap2.serialization.soapserializationenvelope.writeproperty(soapserializationenvelope.java:613)     07-11 05:37:33.032: w/system.err(1698):     @ org.ksoap2.serialization.soapserializationenvelope.writeobjectbody(soapserializationenvelope.java:582)     07-11 05:37:33.032: w/system.err(1698):     @ org.ksoap2.serialization.soapserializationenvelope.writeobjectbody(soapserializationenvelope.java:566)     07-11 05:37:33.062: w/system.err(1698):     @ org.ksoap2.serialization.soapserializationenvelope.writeelement(soapserializationenvelope.java:623)     07-11 05:37:33.072: w/system.err(1698):     @ org.ksoap2.serialization.soapserializationenvelope.writebody(soapserializationenvelope.java:547)     07-11 05:37:33.072: w/system.err(1698):     @ org.ksoap2.soapenvelope.write(soapenvelope.java:192)     07-11 05:37:33.092: w/system.err(1698):     @ org.ksoap2.transport.transport.createrequestdata(transport.java:74)     07-11 05:37:33.092: w/system.err(1698):     @ org.ksoap2.transport.httptransportse.call(httptransportse.java:58)     07-11 05:37:33.112: w/system.err(1698):     @ com.example.androidwsclient.webserviceactivity.oncreate(webserviceactivity.java:99)     07-11 05:37:33.112: w/system.err(1698):     @ android.app.activity.performcreate(activity.java:5104)     07-11 05:37:33.132: w/system.err(1698):     @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1080) 

implement marshal double

public class marshaldouble implements marshal  {  @override public object readinstance(xmlpullparser parser, string namespace, string name,          propertyinfo expected) throws ioexception, xmlpullparserexception {      return double.parsedouble(parser.nexttext()); }  public void register(soapserializationenvelope cm) {      cm.addmapping(cm.xsd, "double", double.class, this);  }  @override public void writeinstance(xmlserializer writer, object obj) throws ioexception {        writer.text(obj.tostring());     }            } 

then call there register method in code.

new marshaldouble().register(envelope);