Return an Array of Strings from an ASP.NET Web Service to an Android client using SOAP -
i want return array of strings android client , populate listview. using soap library (org.ksoap2.*) invoke asp.net web service.
here code web service:
1. asp web service
imports ... imports system.web.services imports system.web.services.protocols imports ... <webservice(namespace:="...")>_ <webservice(conformsto:=...)> _ <global.microsoft.visualbasic.compilerservices.designergenerated()> _ public class enquiryws inherits system.web.services.webservice ' web method <webmethod()> _ public function getlist() string() 'hardcoded list return new string() { "item1", "item2", "item3" } end function i've tested web service accessing asmx, there no runtime errors. i've tested simple string, web service returned string android. this:
' web method <webmethod()> _ public function getstring() string return "my string." end function 2. android activity
secondly, here android code invoking asp.net web service.
import org.ksoap2.soapenvelope; import org.ksoap2.serialization.soapobject; import org.ksoap2.serialization.soapprimitive; import org.ksoap2.serialization.soapserializationenvelope; import org.ksoap2.transport.httptransportse; public class mainactivity extends appcompatactivity { private arraylist<string> list; private listview listview; private arrayadapter<string> adapter; @override protected void oncreate(bundle savedinstancestate) { //... new getpersonlist().execute("asynctask string"); //... } // inner asynctask class private class getpersonlist extends asynctask<string, integer,string> { private static final string soap_action = "https://mynamespace/getlist"; private static final string method_name = "getlist"; private static final string namespace = "https://mynamespace/"; private static final string url = "https://myiissite/myasmxfile.asmx"; @override protected void onpreexecute() { super.onpreexecute(); // onpreexecute stuff } @override protected string doinbackground(string... arg) { string result = null; soapobject request = new soapobject(namespace, method_name); //create envelope soapserializationenvelope envelope = new soapserializationenvelope(soapenvelope.ver11); //required .net envelope.dotnet = true; //set output soap object envelope.setoutputsoapobject(request); //create http call object httptransportse androidhttptransport = new httptransportse(url); try { //invoke web service androidhttptransport.call(soap_action, envelope); //get response soapprimitive response = (soapprimitive) envelope.getresponse(); //assign response static variable result = response.tostring(); } catch (exception e) { result = "error " + e.getmessage(); } return result; } @override protected void onpostexecute(string result) { system.out.println("returned soap xml: " + result); myfunction(result); } } } myfunction method created additional work.
3. myfunction
here myfunction method code:
public void myfunction(string s) { // add webservice response list list.add(s); // set adapter adapter = new arrayadapter<string>(mainactivity.this, android.r.layout.simple_list_item1, list); listview.setadapter(adapter); } the argument pass myfunction soap response, add list , set adapter.
okay, web service returning array of strings, overriden onpostexecute method working 1 string, if declare onpostexecute parameter collection, not overriding anymore.
this error getting in logcat:
return soap xml: error expected: start_tag {http://schemas.xmlsoap.org/soap/envelope/}envelope (position:start_tag <html>@1:7 in java.io.inputstreamreader@4182d238) could please advise?
i have found solution. casting response soapobject , not soapprimitive, reason because soapprimitive primitive data types, soapobject supports composite data types. therefore, casting array soapobject , not soapprimitive anymore.
i have removed myfunction() method, because setting adapter in onpostexecute() method override run(). , finally, have added progressdialog, showing progressdialog in onpreexecute() method while it's processing, , invoking dismiss() in onpostexecute() method.
private class getpersonlist extends asynctask<void, void, string> { private static final string soap_action = "http://mynamespace/mymethod"; private static final string method_name = "mymethod"; private static final string namespace = "http://mynamespace/"; private static final string url = "http://myurl/myasmxfile.asmx"; progressdialog progressdialog; @override protected void onpreexecute() { super.onpreexecute(); progressdialog= progressdialog.show(mainactivity.this, "wait", "retrieving data", true ); } @override protected string doinbackground(void... params) { string finalresult = null; //create request object soapobject request = new soapobject(namespace, method_name); //create envelope add our request object soapserializationenvelope envelope = new soapserializationenvelope( soapenvelope.ver11); //required .net envelope.dotnet = true; //add request object envelope envelope.setoutputsoapobject(request); //create http call object httptransportse androidhttptransport = new httptransportse(url); try { //invoke web service androidhttptransport.call(soap_action, envelope); // response // cast soapobject , not soapprimitive soapobject response = (soapobject) envelope.getresponse(); //assign response static variable finalresult = response.tostring(); // loop through response (loop through properties) // , add them list for(int = 0; < response.getpropertycount(); i++) { list.add(response.getproperty(i).tostring()); } } catch (exception e) { system.out.println("######## error " + e.getmessage()); } return finalresult; } @override protected void onpostexecute(string str) { progressdialog.dismiss(); system.out.println("returned soap xml: " + str); runonuithread(new runnable() { @override public void run() { // set adapter adapter = new arrayadapter<string>(mainactivity.this, r.layout.list_item, r.id.product_name, list); listview.setadapter(adapter); } }); } } i have heard there way of doing using gson/json, post once have figured out.
cheerz
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