android - How to get data from service to activity -

in app have activity , service... service broadcast messages gathered data gps... activity should receive broadcast messages , update ui...

my code

public class locationpollerdemo extends activity {     private static final int period = 10000; // 30 minutes     private pendingintent pi = null;     private alarmmanager mgr = null;     private double lati;     private double longi;     private servicereceiver servicereceiver;      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.main);          mgr = (alarmmanager) getsystemservice(alarm_service);          intent = new intent(this, locationpoller.class);          i.putextra(locationpoller.extra_intent, new intent(this, servicereceiver.class));         i.putextra(locationpoller.extra_provider, locationmanager.gps_provider);          pi = pendingintent.getbroadcast(this, 0, i, 0);         mgr.setrepeating(alarmmanager.elapsed_realtime_wakeup, systemclock.elapsedrealtime(), period, pi);          debuglog.logtrace("on create demo");         toast.maketext(this, "location polling every 30 minutes begun", toast.length_long).show();         servicereceiver = new servicereceiver();         intentfilter filter = new intentfilter("me");         this.registerreceiver(servicereceiver, filter);     }      class servicereceiver extends broadcastreceiver {         @override         public void onreceive(context context, intent intent) {             file log = new file(environment.getexternalstoragedirectory(), "location2.txt");             debuglog.logtrace(environment.getexternalstoragedirectory().getabsolutepath());              try {                 bufferedwriter out = new bufferedwriter(new filewriter(log.getabsolutepath(), log.exists()));                  out.write(new date().tostring());                 out.write(" : ");                  bundle b = intent.getextras();                 location loc = (location) b.get(locationpoller.extra_location);                 string msg;                  if (loc == null) {                     loc = (location) b.get(locationpoller.extra_lastknown);                      if (loc == null) {                         msg = intent.getstringextra(locationpoller.extra_error);                     } else {                         msg = "timeout, lastknown=" + loc.tostring();                     }                 } else {                     msg = loc.tostring();                 }                  if (msg == null) {                     msg = "invalid broadcast received!";                 }                  out.write(msg);                 out.write("\n");                 out.close();             } catch (ioexception e) {                 log.e(getclass().getname(), "exception appending log file", e);                 debuglog.logexception(e);             }         }     } } 

when use code not working properly... using servicereceiver class in separate file works fine.... please tell me...!!

in service class wrote this

private static void sendmessagetoactivity(location l, string msg) {     intent intent = new intent("gpslocationupdates");     // can include data.     intent.putextra("status", msg);     bundle b = new bundle();     b.putparcelable("location", l);     intent.putextra("location", b);     localbroadcastmanager.getinstance(context).sendbroadcast(intent); } 

and @ activity side have receive broadcast message

localbroadcastmanager.getinstance(getactivity()).registerreceiver(             mmessagereceiver, new intentfilter("gpslocationupdates")); 

by way can send message activity. here mmessagereceiver class in class perform ever want....

in code did this....

private broadcastreceiver mmessagereceiver = new broadcastreceiver() {     @override     public void onreceive(context context, intent intent) {         // data included in intent         string message = intent.getstringextra("status");         bundle b = intent.getbundleextra("location");         lastknownloc = (location) b.getparcelable("location");         if (lastknownloc != null) {             tvlatitude.settext(string.valueof(lastknownloc.getlatitude()));             tvlongitude                     .settext(string.valueof(lastknownloc.getlongitude()));             tvaccuracy.settext(string.valueof(lastknownloc.getaccuracy()));             tvtimestamp.settext((new date(lastknownloc.gettime())                     .tostring()));             tvprovider.settext(lastknownloc.getprovider());         }         tvstatus.settext(message);         // toast.maketext(context, message, toast.length_short).show();     } };