android - could not get updated location in -

in application setting timer of 10 sec current location calling locationmanager.requestlocationupdates(); problem couldnt updated location instead gives same latitude , longitude application has started..

below code written in service.. , suggestions appreciated

public class demoservice extends service{       locationmanager locationmanager;     public timer timer;     public static int i;     private string file_name = "location.txt";     @override     public ibinder onbind(intent intent) {         // todo auto-generated method stub         return null;     }      @override     public void onstart(intent intent, int startid) {         // todo auto-generated method stub         super.onstart(intent, startid);          locationmanager = (locationmanager) this.getsystemservice(context.location_service);          toast.maketext(getapplicationcontext(), "onstart()....", toast.length_short).show();         timer = new timer();         timer.schedule(new maintask(), 0, 10*1000);      }      @override     public void oncreate() {         // todo auto-generated method stub         super.oncreate();          toast.maketext(getapplicationcontext(), "oncreate()....", toast.length_short).show();     }      @override     public void ondestroy() {         // todo auto-generated method stub         super.ondestroy();         toast.maketext(getapplicationcontext(), "ondestroy()....", toast.length_short).show();         timer.cancel();     }       private class maintask extends timertask         {              public void run()              {                 toasthandler.sendemptymessage(0);             }         }                private final handler toasthandler = new handler()         {             @override             public void handlemessage(message msg)             {                 toast.maketext(getapplicationcontext(), "test "+(i), toast.length_short).show();                 locationmanager.requestlocationupdates(locationmanager.network_provider, 0, 0, new mylocationlisterner());             }         };               public class mylocationlisterner implements locationlistener{               @override             public void onlocationchanged(location location) {                 // todo auto-generated method stub                 i++;                 toast.maketext(demoservice.this, "\nlat : "+location.getlatitude()+"\nlog : "+location.getlongitude(), toast.length_short).show();                 savetofile(location);                 locationmanager.removeupdates(this);              }              @override             public void onstatuschanged(string provider, int status, bundle extras) {                 // todo auto-generated method stub                  toast.maketext(demoservice.this,"got onlocationchanged..",toast.length_short).show();                 system.out.println("got onstatuschanged");              }              @override             public void onproviderenabled(string provider) {                 // todo auto-generated method stub                 toast.maketext(demoservice.this,"got onlocationchanged..",toast.length_short).show();                 system.out.println("got onproviderenabled");             }              @override             public void onproviderdisabled(string provider) {                 // todo auto-generated method stub                 toast.maketext(demoservice.this,"got onlocationchanged..",toast.length_short).show();                 system.out.println("got onproviderdisabled");             } 

i achieved resultant effect cwac location poller efficiently got current location of alarm manager less consumption of battery