Android: service 'not yet bound' but onBind() is called? -

i trying make button change interruption filter (none, priority, all) in android lollipop. when press button, log says w/notificationlistenerservice[notificationservice]: notification listener service not yet bound. , not change interruption filter. "nls started" , "nls bound" logs. why giving me warning? here code:

mainactivity.java:

public class mainactivity extends activity {     private notificationservice notifs;     private serviceconnection connection;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          notifs = new notificationservice();         connection = new serviceconnection() {             @override             public void onserviceconnected(componentname name, ibinder service) {                 log.d("notif", "nls started");                 notificationservice.servicebinder binder = (notificationservice.servicebinder)service;                 notifs = binder.getservice();             }              @override             public void onservicedisconnected(componentname name) {                 log.d("notif", "nls stopped");             }         };         intent intent = new intent(this, notificationservice.class);         startservice(intent);         bindservice(intent, connection, context.bind_auto_create);          final button b = (button) findviewbyid(r.id.b);         b.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 if (notifs.getcurrentinterruptionfilter() == notificationservice.interruption_filter_none) {                     //set                     b.setbackground(contextcompat.getdrawable(mainactivity.this, r.drawable.ic_ring_volume));                     notifs.requestinterruptionfilter(notificationservice.interruption_filter_all);                 } else if (notifs.getcurrentinterruptionfilter() == notificationlistenerservice.interruption_filter_priority) {                     //set none                     b.setbackground(contextcompat.getdrawable(mainactivity.this, r.drawable.ic_ring_off));                     notifs.requestinterruptionfilter(notificationservice.interruption_filter_none);                 } else {                     //set priority                     b.setbackground(contextcompat.getdrawable(mainactivity.this, r.drawable.ic_ring_priority));                     notifs.requestinterruptionfilter(notificationservice.interruption_filter_priority);                 }             }         });     }      @override     public void ondestroy() {         super.ondestroy();         unbindservice(connection);         connection = null;     } } 

notificationservice.java:

public class notificationservice extends notificationlistenerservice {     private final ibinder binder = new servicebinder();     private boolean isbound = false;      public notificationservice() {     }      public class servicebinder extends binder {         notificationservice getservice() {             return notificationservice.this;         }     }      @override     public ibinder onbind(intent intent) {         isbound = true;         log.d("notif", "nls bound");         return binder;     }      @override     public int onstartcommand(intent intent, int flags, int startid) {         return start_sticky;     }      @override     public void oncreate() {         super.oncreate();         log.d("notif", "started");         toast.maketext(notificationservice.this, "nls started", toast.length_short).show();     }      @override     public void ondestroy() {         super.ondestroy();     }      public boolean isbound() {         return isbound;     } } 

replace onbind() method in service this:

@override public ibinder onbind(intent intent) {     isbound = true;     string action = intent.getaction();     log.d("notif", "onbind: " + action);      if (service_interface.equals(action)) {         log.d("notif", "bound system");         return super.onbind(intent);     } else {         log.d("notif", "bound application");         return binder;     } } 

also check service declared in manifest shown in overview of documentation.

if service correctly declared in manifest, , notification access enabled in security / sound & notification, system bind service using action notificationlistenerservice.service_interface. bind request, service must return binder notificationlistenerservice, super.onbind(intent).