android - unBind a bound service -


i've bound service runs in separate process

public class downloadservice extends service {  private looper mlooper; private servicehandler mservicehandler;  private messenger messenger; private messenger uimessenger;  @override public void oncreate() {     super.oncreate();      handlerthread thread = new handlerthread("servicestartarguments",             process.thread_priority_foreground);     thread.start();      mlooper = thread.getlooper();     mservicehandler = new servicehandler(mlooper);      messenger = new messenger(mservicehandler); }  private class servicehandler extends handler {      public servicehandler() {      }      public servicehandler(looper looper) {         super(looper);     }      @override     public void handlemessage(message msg) {          switch (msg.what) {          case msg_download_request:              string url = msg.getdata().getstring("url");              log.d("test", url);              // download(url);              break;          default:             super.handlemessage(msg);             break;         }     } }  @override public ibinder onbind(intent intent) {      log.d("test", "onbind");      return messenger.getbinder(); }  @override public void onrebind(intent intent) {     log.d("test", "onrebind");     super.onrebind(intent); }  @override public boolean onunbind(intent intent) {      log.d("test", "onunbind");      return super.onunbind(intent); }  @override public void ondestroy() {      log.d("test", "ondestroy");      super.ondestroy(); }  }

and serviceconnection this:

serviceconnection = new serviceconnection() {              @override             public void onservicedisconnected(componentname name) {                  servicemessenger = null;                 isconnected = false;                  log.d("test", "disconn");             }              @override             public void onserviceconnected(componentname name,                     ibinder service) {                  if (servicemessenger == null) {                      servicemessenger = new messenger(service);                 }                  isconnected = true;                  log.d("test", "conn");                  send();             }         };

request bind service

intent intent = new intent(context, downloadservice.class);         context.bindservice(intent, serviceconnection,                 context.bind_auto_create);

and unbind request

        context.unbindservice(serviceconnection);

once call bindservice every thing , work , onserviceconnected method of serviceconnection invoked, when call unbind method onservicedisconnected not called! while onunbind , ondestroy methods of service invoked.

and more surprisingly, can communicate service using servicemessenger made in previous bind!

summary
1. why onservicedisconnected not invoked when call unbind method?
2- why possible communicate service destroyed due unbind call?


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