Android Location service didn't work in background -

i working on location-app should begin track statistic data based on longitude , latitude when user presses button. stuff works when comes lock screen or put app in background service not work anymore !

i have read lot background services , broadcast receivers don't know how implement google api location listener in service , implement class in mainactivity. can tell me short code example how implement such service or link explained ?

use fuse location service , save updated location every time

public class locationnotifyservice extends service implements         locationlistener,         googleapiclient.connectioncallbacks,         googleapiclient.onconnectionfailedlistener {      locationrequest mlocationrequest;     googleapiclient mgoogleapiclient;     public static location mcurrentlocation;      .............................      @override     public void oncreate() {          //show error dialog if goolgleplayservices not available         if (isgoogleplayservicesavailable()) {             mlocationrequest = new locationrequest();         mlocationrequest.setinterval(background_interval);           mlocationrequest.setfastestinterval(background_interval);         mlocationrequest.setpriority(locationrequest.priority_high_accuracy);         //mlocationrequest.setsmallestdisplacement(10.0f);  /* min dist location change, here 10 meter */             mgoogleapiclient = new googleapiclient.builder(this)                     .addapi(locationservices.api)                     .addconnectioncallbacks(this)                     .addonconnectionfailedlistener(this)                     .build();              mgoogleapiclient.connect();         }     }      @override     public int onstartcommand(intent intent, int flags, int startid) {          return super.onstartcommand(intent, flags, startid);     }      //check google play available or not     private boolean isgoogleplayservicesavailable() {         int status = googleplayservicesutil.isgoogleplayservicesavailable(getapplicationcontext());         return connectionresult.success == status;     }       @override     public void onconnected(bundle bundle) {         startlocationupdates();     }      protected void startlocationupdates() {         try {              pendingresult<status> pendingresult = locationservices.fusedlocationapi.requestlocationupdates(                     mgoogleapiclient, mlocationrequest, this);         } catch (illegalstateexception e) {}     }      @override     public void onlocationchanged(location location) {          //save location     }     ............................ } 

you can current location onlocationchanged()

for more details check http://javapapers.com/android/android-location-fused-provider/ or follow official guide https://developer.android.com/training/location/index.html