java - Trying to recieve a string through a broadcast in an activity from a service, not seeing anything -

here's code below. first bit of code activity. put click listener on button in activity starts service. right now, want see can recieve strings service here code trying that. put "hello world" broadcast in oncreate of service test. can spot issue? service code below activity code.

package homebrewchatter.calcs;  import android.app.activity; import android.content.broadcastreceiver; import android.content.context; import android.content.intent; import android.content.intentfilter; import android.content.sharedpreferences; import android.os.bundle; import android.util.log; import android.view.view; import android.view.view.onclicklistener; import android.widget.textview; import android.widget.edittext; import android.widget.button;  import java.util.list;  public class hop_timer extends activity {     private textview timerout;       private broadcastreceiver onbroadcast = new broadcastreceiver() {             @override             public void onreceive(context ctxt, intent i) {                 hop_timer.this.timerout = (textview)hop_timer.this.findviewbyid(r.id.display_time);                 hop_timer.this.timerout.settext("recieved");             }     };      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.hoptimer);          button setvars = (button) findviewbyid(r.id.add_alarm_button);         setvars.setonclicklistener(new view.onclicklistener() {              public void onclick(view v) {                 //hop_timer.this.timerout = (textview)hop_timer.this.findviewbyid(r.id.display_time);                 //hop_timer.this.timerout.settext("working far");                 startservice(new intent(hop_timer.this, hop_timer_service.class));             }          });     }      public void onresume() {         super.onresume();         registerreceiver(onbroadcast, new intentfilter("mymessage"));     }     public void onpause() {         super.onpause();         unregisterreceiver(onbroadcast);     }   }  package homebrewchatter.calcs;  import android.app.service; import android.content.intent; import android.os.handler; import android.os.ibinder; import android.os.systemclock;  public class hop_timer_service extends service {     private handler mhandler = new handler();     private int length_minutes;     private boolean timer_running;     private long starttime = 0l;     public string currenttime = "";      @override     public void oncreate() {         length_minutes = 0;         timer_running = false;         getapplicationcontext().sendbroadcast(new intent("hello world"));     }      public void settime(int mins) {         length_minutes = mins;     }      public void starttimer() {         starttime = system.currenttimemillis();         mhandler.removecallbacks(mupdatetimertask);         mhandler.postdelayed(mupdatetimertask, 100);     }      private runnable mupdatetimertask = new runnable() {         public void run() {             final long start = starttime;             long millis = systemclock.uptimemillis() - start;             int seconds = (int) (millis/1000);             int minutes = seconds /60;             seconds = seconds %60;             if(seconds < 10) {                 currenttime = "" + minutes + ":0" + seconds;             } else {                 currenttime = "" + minutes + ":" + seconds;              }             getapplicationcontext().sendbroadcast(new intent(currenttime));             mhandler.postattime(this, start + (((minutes * 60) + seconds + 1) * 1000));         }     };      @override     public ibinder onbind(intent intent) {         // todo auto-generated method stub         return null;     } } 

with respect actual question, intent broadcasting not match intentfilter using in registerreceiver(). since intentfilter says looking "mymessage" intents, intent broadcast needs have "mymessage" action. right now, 1 of intents has action based on current time, unlikely received anything. other has action of "hello world".

beyond that:

• by default, broadcasts broadcast entire device. if intending broadcast entire device, please use action string namespaced app (e.g., homebrewchatter.calcs.mymessage). if not intending broadcast entire device, please use setpackage() on intent broadcast keep within application.

• since service context, not need use getapplicationcontext() in service broadcasts.

• you not appear calling starttimer().

• it infrequently idea, in production code, have service primary job sit , watch time tick by. alarmmanager more common solution here, service can in memory when adding actual value user.

• you start service, never stop it.