android - FusedLocationProviderClient getLocationAvailability needs a delay to give a correct result -


i'm trying last location checking first if gps enabled, ask user go settings enable if it's not, , when go settings app, after enabling gps location, , check if gps available, it's not enabled, after delay (1-2 seconds) is.

why there delay in fusedlocationproviderclient.getlocationavailability() method? how can solve it? here's code:

@inject fusedlocationproviderclient fusedlocationproviderclient;  @override public void onviewcreated(view view, @nullable bundle savedinstancestate) {     super.onviewcreated(view, savedinstancestate);      checkandgetlastlocation(); }   @override public void onactivityresult(int requestcode, int resultcode, intent data) {     super.onactivityresult(requestcode, resultcode, data);     if (requestcode == gps_enable_request) {         checkandgetlastlocation();     } else {         super.onactivityresult(requestcode, resultcode, data);     } }  @suppresswarnings("missingpermission") private void checkandgetlastlocation() {     fusedlocationproviderclient.getlocationavailability().addoncompletelistener(getactivity(), availabilitylistener -> {         if (availabilitylistener.issuccessful() && availabilitylistener.getresult() != null && availabilitylistener.getresult().islocationavailable()) {             showprogress();             getlastlocation();         } else {             showgpsdisableddialog();         }     }); }  public void showgpsdisableddialog() {     hideprogress();      alertdialog.builder builder = new alertdialog.builder(getactivity());     builder.settitle(r.string.gps_disabled_title);     builder.setmessage(r.string.gps_disabled_message);     builder.setpositivebutton(r.string.enable_gps, (dialog, which) -> {         dialog.dismiss();         startactivityforresult(new intent(settings.action_location_source_settings), gps_enable_request);     }).setnegativebutton(r.string.not_enable_gps, (dialog, which) -> {         switchtomanualmode();     });     alertdialog mgpsdialog = builder.create();     mgpsdialog.setcancelable(false);     mgpsdialog.show(); }  @suppresswarnings("missingpermission") private void getlastlocation() {     locationlistlayout.setvisibility(view.visible);     addlocationbutton.setvisibility(view.visible);     addlocationlistlayout.setvisibility(view.gone);     searchlocationsbutton.setvisibility(view.gone);      fusedlocationproviderclient.getlastlocation()             .addoncompletelistener(getactivity(), locationlistener -> {                 if (locationlistener.issuccessful() && locationlistener.getresult() != null) {                     location lastlocation = locationlistener.getresult();                     locationstep1presenter.getsites(lastlocation);                 } else {                     log.d(this.gettag(), "checkandgetlastlocation:exception", locationlistener.getexception());                     hideprogress();                     shownositestoshowerror();                 }             }); }


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