java - android ksoap2 crashes and I cannot catch it -


i following tutorial . straight-forward , crashes on emulator. cannot catch error. dont understand problem. here piece of code.

private final string namespace = "http://www.webservicex.net/"; private final string url = "http://www.webservicex.net/convertweight.asmx"; private final string soap_action = "http://www.webservicex.net/convertweight"; private final string method_name = "convertweight";  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      soapobject request = new soapobject(namespace, method_name);       string weight = "3700";     string fromunit = "grams";     string tounit = "kilograms";       propertyinfo weightprop =new propertyinfo();     weightprop.setname("weight");     weightprop.setvalue(weight);     weightprop.settype(double.class);     request.addproperty(weightprop);      propertyinfo fromprop =new propertyinfo();     fromprop.setname("fromunit");     fromprop.setvalue(fromunit);     fromprop.settype(string.class);     request.addproperty(fromprop);      propertyinfo toprop =new propertyinfo();     toprop.setname("tounit");     toprop.setvalue(tounit);     toprop.settype(string.class);     request.addproperty(toprop);      soapserializationenvelope envelope = new soapserializationenvelope(soapenvelope.ver11);     envelope.dotnet = true;     envelope.setoutputsoapobject(request);     httptransportse androidhttptransport = new httptransportse(url);      try {         androidhttptransport.call(soap_action, envelope);         soapprimitive response = (soapprimitive)envelope.getresponse();         log.i("myapp", response.tostring());          textview tv = new textview(this);         tv.settext(weight+" "+fromunit+" equal "+response.tostring()+ " "+tounit);         setcontentview(tv);      } catch (exception e) {         e.printstacktrace();     }  }

what think problem is? downloaded ksoap2 library , included in project. tried on real device , works. enabled internet access on config file.

any great. or can suggest tutorial?

after android 3.0 cannot access web in activity's main thread, need start new thread access web


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