Wie Fragen Sie den Benutzer, die GPS-Funktion beim Start der Anwendung?

 GoogleApiClient googleApiClient = new GoogleApiClient.Builder(context)
            .addApi(LocationServices.API)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this).build();
    googleApiClient.connect();

    LocationRequest locationRequest = LocationRequest.create();
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    locationRequest.setInterval(5 * 1000);
    locationRequest.setFastestInterval(2 * 1000);
    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
            .addLocationRequest(locationRequest);

    //**************************
    builder.setAlwaysShow(true); //this is the key ingredient
    //**************************

    PendingResult<LocationSettingsResult> result =
            LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
    result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
        @Override
        public void onResult(@NonNull LocationSettingsResult result) {
            final Status status = result.getStatus();
//               final LocationSettingsStates state = result.getLocationSettingsStates();

            switch (status.getStatusCode()) {
                case LocationSettingsStatusCodes.SUCCESS:


                    break;
                case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                    //Location settings are not satisfied. But could be fixed by showing the user
                    //a dialog.
                    try {
                        //Show the dialog by calling startResolutionForResult(),
                        //and check the result in onActivityResult().
                        status.startResolutionForResult(
                                context, 1000);
                    } catch (IntentSender.SendIntentException e) {
                        //Ignore the error.
                    }
                    break;
                case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                    break;
            }
        }
    });

InformationsquelleAutor Dheerubhai Bansal

Wenn du etwas möchtest, wie unten dargestellt, entlang Folgen.

1. Fügen Sie die folgenden Abhängigkeiten in Ihrem app build.gradle

     implementation 'com.google.android.gms:play-services-location:16.0.0'

2. Erstellen Sie die Art von Ort Anforderung Sie wollen, wir wollen eine hohe Genauigkeit für GPS -

     LocationRequest locationRequest = LocationRequest.create();
     locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
     LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
                   .addLocationRequest(locationRequest);

3. Nun müssen wir überprüfen den aktuellen Zustand des GPS. Für diese müssen wir nutzen LocationServices.getSettingsClient(getActivity()).checkLocationSettings(builder.build()) Diese zurück Task muss asynchron verarbeitet. In RESOLUTION_REQUIRED Fall, bitten wir die Benutzer-Berechtigungen zu erteilen, das ist, wo wir zeigen, dass die Benutzer die Aufforderung zum aktivieren von GPS.

   Task<LocationSettingsResponse> result =
                   LocationServices.getSettingsClient(getActivity()).checkLocationSettings(builder.build());
   
   
   
   result.addOnCompleteListener(new OnCompleteListener<LocationSettingsResponse>() {
               @Override
               public void onComplete(@NonNull Task<LocationSettingsResponse> task) {
                   try {
                       LocationSettingsResponse response = task.getResult(ApiException.class);
                       //All location settings are satisfied. The client can initialize location
                       //requests here.
                   } catch (ApiException exception) {
                       switch (exception.getStatusCode()) {
                           case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                               //Location settings are not satisfied. But could be fixed by showing the
                               //user a dialog.
                               try {
                                   //Cast to a resolvable exception.
                                   ResolvableApiException resolvable = (ResolvableApiException) exception;
                                   //Show the dialog by calling startResolutionForResult(),
                                   //and check the result in onActivityResult().
                                   resolvable.startResolutionForResult(
                                           getActivity(),
                                           LocationRequest.PRIORITY_HIGH_ACCURACY);
                               } catch (IntentSender.SendIntentException e) {
                                   //Ignore the error.
                               } catch (ClassCastException e) {
                                   //Ignore, should be an impossible error.
                               }
                               break;
                           case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                               //Location settings are not satisfied. However, we have no way to fix the
                               //settings so we won't show the dialog.
                               break;
                       }
                   }
               }
           });

4. Nun, dass wir gebeten haben, Benutzer zu aktivieren GPS, die wir brauchen, um zu überprüfen, ob Benutzer erlaubt es oder ignoriert es. Für diese überschreiben onActivityResult. Bitte beachten Sie, dass, wenn Sie die Umsetzung der oben genannten code in ein fragment, das Ergebnis wird in der umgebenden Aktivität. So überschreiben onActivityResult in der Activity-Klasse.

   @Override
   public void onActivityResult(int requestCode, int resultCode, Intent data) {
   switch (requestCode) {
       case LocationRequest.PRIORITY_HIGH_ACCURACY:
           switch (resultCode) {
               case Activity.RESULT_OK:
                   //All required changes were successfully made
                   Log.i(TAG, "onActivityResult: GPS Enabled by user");
                   break;
               case Activity.RESULT_CANCELED:
                   //The user was asked to change settings, but chose not to
                   Log.i(TAG, "onActivityResult: User rejected GPS request");
                   break;
               default:
                   break;
           }
           break;
       } 
   }

Von Der Android-Dokumentation

InformationsquelleAutor Ananth Raj Singh