Map does not open to user's location in Android -

whenever run android code , map opens on real device (not on emulator), not pointing anywhere , shows map of world zoomed out instead of user's location. have tried various various combinations right , nothing has helped me.

below code tried getting user's , still behavior remains same. tried changing gps_service network_provider , still no help. might solution here?

the device using testing here 1 plus 3.

manifest.xml:

<uses-permission android:name="android.permission.access_fine_location" /> <uses-permission android:name="android.permission.internet" /> 

mapsactivity:

    public class mapsactivity extends fragmentactivity implements onmapreadycallback {      private googlemap mmap;     locationmanager locationmanager;     locationlistener locationlistener;      @override     public void onrequestpermissionsresult(int requestcode, @nonnull string[] permissions, @nonnull int[] grantresults) {         super.onrequestpermissionsresult(requestcode, permissions, grantresults);          if(requestcode == 1) {              if (grantresults.length > 0 && grantresults[0] == packagemanager.permission_granted) {                  if (contextcompat.checkselfpermission(this, manifest.permission.access_fine_location) == packagemanager.permission_granted) {                      locationmanager.requestlocationupdates(locationmanager.network_provider, 0, 0, locationlistener);                  }              }          }      }      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_maps);         // obtain supportmapfragment , notified when map ready used.         supportmapfragment mapfragment = (supportmapfragment) getsupportfragmentmanager()                 .findfragmentbyid(r.id.map);         mapfragment.getmapasync(this);      }       /**      * manipulates map once available.      * callback triggered when map ready used.      * can add markers or lines, add listeners or move camera. in case,      * add marker near sydney, australia.      * if google play services not installed on device, user prompted install      * inside supportmapfragment. method triggered once user has      * installed google play services , returned app.      */     @override     public void onmapready(googlemap googlemap) {         mmap = googlemap;          // mmap.setmaptype(googlemap.map_type_hybrid);          locationmanager = (locationmanager) this.getsystemservice(context.location_service);          locationlistener = new locationlistener() {             @override             public void onlocationchanged(location location) {                  // add marker on user's location , move camera.                 latlng yourlocation = new latlng(location.getlatitude(), location.getlongitude());                  mmap.clear();                 mmap.addmarker(new markeroptions().position(yourlocation).title("your location"));                 mmap.movecamera(cameraupdatefactory.newlatlng(yourlocation));                  // address of user location.                 geocoder geocoder = new geocoder(getapplicationcontext(), locale.getdefault());                  try {                      // 1 - represents 1 location required.                     list<address> listaddresses = geocoder.getfromlocation(location.getlatitude(), location.getlongitude(), 1);                      if(listaddresses != null && listaddresses.size() > 0) {                          log.i("placeinfo", listaddresses.get(0).tostring());                          string address = "";                          if(listaddresses.get(0).getsubthoroughfare() != null) {                              address += listaddresses.get(0).getsubthoroughfare() + " ";                          }                          if(listaddresses.get(0).getthoroughfare() != null) {                              address += listaddresses.get(0).getthoroughfare() + ", ";                          }                          if(listaddresses.get(0).getlocality() != null) {                              address += listaddresses.get(0).getlocality() + ", ";                          }                          if(listaddresses.get(0).getpostalcode() != null) {                              address += listaddresses.get(0).getpostalcode() + ", ";                          }                          if(listaddresses.get(0).getcountryname() != null) {                              address += listaddresses.get(0).getcountryname();                          }                          toast.maketext(mapsactivity.this, address, toast.length_long).show();                         log.i("address", address);                     }                  } catch (ioexception e) {                      e.printstacktrace();                  }              }              @override             public void onstatuschanged(string s, int i, bundle bundle) {              }              @override             public void onproviderenabled(string s) {              }              @override             public void onproviderdisabled(string s) {              }         };          if(build.version.sdk_int < 23) {              locationmanager.requestlocationupdates(locationmanager.network_provider, 0, 0, locationlistener);          }         else {              if (contextcompat.checkselfpermission(this, manifest.permission.access_fine_location) != packagemanager.permission_granted) {                  activitycompat.requestpermissions(this, new string[]{manifest.permission.access_fine_location}, 1);              } else {                  locationmanager.requestlocationupdates(locationmanager.network_provider, 0, 0, locationlistener);                  // users's current location.                 location lastknownlocation = locationmanager.getlastknownlocation(locationmanager.network_provider);                  latlng yourlocation = new latlng(lastknownlocation.getlatitude(), lastknownlocation.getlongitude());                 mmap.clear();                  mmap.addmarker(new markeroptions().position(yourlocation).title("your location"));                 mmap.movecamera(cameraupdatefactory.newlatlng(yourlocation));              }         }     } }