signalr - Setting up Signal R in Android: Crash/Hung Issue -

i followed this tutorial set .net backend android app implement signal r. set signalr self-hosted backend.

here's backend code in console project:

namespace signalrselfhost {     class program     {         static void main(string[] args)         {             // *only* bind localhost, if want bind addresses             // use http://*:8080 bind addresses.              // see http://msdn.microsoft.com/en-us/library/system.net.httplistener.aspx              // more information.             string url = "http://localhost:8080";             using (webapp.start(url))             {                 console.writeline("server running on {0}", url);                 console.readline();             }         }     }     class startup     {         public void configuration(iappbuilder app)         {             app.usecors(corsoptions.allowall);             app.mapsignalr();         }     }     public class messagehub : hub     {         public static event action<string, string> messagereceived = delegate { };          public void sendmessage(string name, string message)         {             messagereceived(name, message);         }      }      public class customtype     {         public string name;         public int id;     } } 

my android code:

    handler handler;     textview statusfield;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main2);          handler = new handler();         statusfield = (textview) findviewbyid(r.id.statusfield);          platform.loadplatformcomponent(new androidplatformcomponent());         // change ip address , matching port of signalr server.         string host = "http://192.168.1.5:8080/";         hubconnection connection = new hubconnection( host );         hubproxy hub = connection.createhubproxy( "messagehub" );         clienttransport transport = new serversenteventstransport(connection.getlogger());          signalrfuture<void> awaitconnection = connection.start(transport);         try {             awaitconnection.get();         }         catch (interruptedexception e) {             log.d("check", e.tostring());             e.printstacktrace();         } catch (executionexception e) {             log.d("check", e.tostring());             e.printstacktrace();         }          hub.subscribe(this);          try {             hub.invoke( "sendmessage", "client", "hello world!" ).get();             hub.invoke( "sendcustomtype",                     new customtype() {{ name = "universe"; id = 42; }} ).get();         } catch (interruptedexception e) {             // handle ...         } catch (executionexception e) {             // handle ...         }      }      public void updatestatus(string status) {         final string fstatus = status;         handler.post(new runnable() {             @override             public void run() {                 statusfield.settext(fstatus);             }         });     }      public class customtype     {         public string name;         public int id;     } 

however, end screen hangs , displays nothing , app stops responding. android logger displays following error:

java.util.concurrent.executionexception: java.net.connectexception: failed connect localhost/127.0.0.1 (port 80) after 15000ms: isconnected failed: econnrefused (connection refused)

is code correct , have followed guide properly? it's straight forward guide issue comes up. can out?

edit:

this similar question, in fact describes same issue. didn't me good. if notice android code, i've made changes proposed in question. still didn't rectify issue.

stacktrace

 java.util.concurrent.executionexception: java.net.sockettimeoutexception: failed connect / 192.168.1.5(port 8080) after 15000ms  @ microsoft.aspnet.signalr.client.signalrfuture.get(signalrfuture.java: 112)  @ microsoft.aspnet.signalr.client.signalrfuture.get(signalrfuture.java: 102)  @ com.example.dinuka.signalrtest.main2activity.oncreate(main2activity.java: 40)  @ android.app.activity.performcreate(activity.java: 6289)  @ android.app.instrumentation.callactivityoncreate(instrumentation.java: 1119)  @ android.app.activitythread.performlaunchactivity(activitythread.java: 2655)  @ android.app.activitythread.handlelaunchactivity(activitythread.java: 2767)  @ android.app.activitythread.access$900(activitythread.java: 177)  @ android.app.activitythread$h.handlemessage(activitythread.java: 1449)  @ android.os.handler.dispatchmessage(handler.java: 102)  @ android.os.looper.loop(looper.java: 145)  @ android.app.activitythread.main(activitythread.java: 5951)  @ java.lang.reflect.method.invoke(native method)  @ java.lang.reflect.method.invoke(method.java: 372)  @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java: 1400)  @ com.android.internal.os.zygoteinit.main(zygoteinit.java: 1195)  caused by: java.net.sockettimeoutexception: failed connect / 192.168.1.5(port 8080) after 15000ms  @ libcore.io.iobridge.connecterrno(iobridge.java: 169)  @ libcore.io.iobridge.connect(iobridge.java: 122)  @ java.net.plainsocketimpl.connect(plainsocketimpl.java: 183)  @ java.net.plainsocketimpl.connect(plainsocketimpl.java: 456)  @ java.net.socket.connect(socket.java: 882)  @ com.android.okhttp.internal.platform.connectsocket(platform.java: 139)  @ com.android.okhttp.connection.connect(connection.java: 1194)  @ com.android.okhttp.internal.http.httpengine.connect(httpengine.java: 392)  @ com.android.okhttp.internal.http.httpengine.sendrequest(httpengine.java: 295)  @ com.android.okhttp.internal.http.httpurlconnectionimpl.execute(httpurlconnectionimpl.java: 373)  @ com.android.okhttp.internal.http.httpurlconnectionimpl.getresponse(httpurlconnectionimpl.java: 323)  @ com.android.okhttp.internal.http.httpurlconnectionimpl.getresponsecode(httpurlconnectionimpl.java: 491)  @ microsoft.aspnet.signalr.client.http.java.networkrunnable.run(networkrunnable.java: 72)  @ java.lang.thread.run(thread.java: 818) 

i had similar issue few days ago , github issue helped: https://github.com/signalr/java-client/issues/63

basically did modify websockettransport.java in signalr-client-sdk project. replace:

uri = new uri(url); 

with

uri = new uri(url.replace("http://", "ws://")); 

around line 86 in source code.

i can connect , send message , recieve raw data cannot subscribe events...

hope helps passed problem.