service - ServieConnection Not Working At All Android -

good day.i have simplest scenario ever be!i have simple service connection taken google in app purchases example , own code

public class mainactivity extends activity { iinappbillingservice mservice; serviceconnection mserviceconn; @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      mserviceconn = new serviceconnection() {         @override         public void onservicedisconnected(componentname name) {             mservice = null;             toast.maketext(mainactivity.this,"disconnected",toast.length_long).show();         }          @override         public void onserviceconnected(componentname name,                                        ibinder service) {             mservice = iinappbillingservice.stub.asinterface(service);             toast.maketext(mainactivity.this,"connected",toast.length_long).show();         }     }; } @override public void ondestroy() {     super.ondestroy();     if (mservice != null) {         unbindservice(mserviceconn);     } } 

} first run worked , toasted.but afterwards never connect never trigger onserviceconnected , onservicedisconnected.doing researches in google did not found solution questions of familiar without responsible answers.thank beforehand , please tell me heck do?

you did not call bind service:

create intent , call bindservice

    @override         protected void oncreate(bundle savedinstancestate) {             super.oncreate(savedinstancestate);             setcontentview(r.layout.activity_main);              mserviceconn = new serviceconnection() {                 @override                 public void onservicedisconnected(componentname name) {                     mservice = null;                     toast.maketext(mainactivity.this,"disconnected",toast.length_long).show();                 }                  @override                 public void onserviceconnected(componentname name,                                                ibinder service) {                     mservice =   iinappbillingservice.stub.asinterface(service);                     toast.maketext(mainactivity.this,"connected",toast.length_long).show();                 }             };      intentfilter filter1 = new intentfilter("intentfiltername");     bindservice(filter1, mconnection, context.bind_auto_create); }