Fixes #2888: Use Dexter for requesting location permissions (#2925)

* Use dexter to ask for location permissions

* Addressed code review comments

app/src/main/java/fr/free/nrw/commons/contributions/ContributionsFragment.java

@@ -5,22 +5,10 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
-import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.database.DataSetObserver;
-import android.os.Build;
 import android.os.Bundle;
 import android.os.IBinder;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentManager;
-import androidx.fragment.app.FragmentTransaction;
-import androidx.loader.app.LoaderManager;
-import androidx.loader.content.CursorLoader;
-import androidx.loader.content.Loader;
-import androidx.cursoradapter.widget.CursorAdapter;
-import androidx.appcompat.app.AlertDialog;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -28,6 +16,16 @@ import android.widget.Adapter;
 import android.widget.CheckBox;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.cursoradapter.widget.CursorAdapter;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.fragment.app.FragmentTransaction;
+import androidx.loader.app.LoaderManager;
+import androidx.loader.content.CursorLoader;
+import androidx.loader.content.Loader;
+
 import java.util.ArrayList;
 
 import javax.inject.Inject;
@@ -57,6 +55,7 @@ import fr.free.nrw.commons.settings.Prefs;
 import fr.free.nrw.commons.upload.UploadService;
 import fr.free.nrw.commons.utils.ConfigUtils;
 import fr.free.nrw.commons.utils.DialogUtil;
+import fr.free.nrw.commons.utils.PermissionUtils;
 import fr.free.nrw.commons.utils.ViewUtil;
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -66,7 +65,7 @@ import timber.log.Timber;
 
 import static fr.free.nrw.commons.contributions.ContributionDao.Table.ALL_FIELDS;
 import static fr.free.nrw.commons.contributions.ContributionsContentProvider.BASE_URI;
-import static fr.free.nrw.commons.location.LocationServiceManager.LOCATION_REQUEST;
+import static fr.free.nrw.commons.contributions.MainActivity.CONTRIBUTIONS_TAB_POSITION;
 import static fr.free.nrw.commons.settings.Prefs.UPLOADS_SHOWING;
 import static fr.free.nrw.commons.utils.LengthUtils.formatDistanceBetween;
 
@@ -351,35 +350,6 @@ public class ContributionsFragment
 
     }
 
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-        Timber.d("onRequestPermissionsResult");
-        switch (requestCode) {
-            case LOCATION_REQUEST: {
-                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                    Timber.d("Location permission granted, refreshing view");
-                    // No need to display permission request button anymore
-                    locationManager.registerLocationManager();
-                } else {
-                    if (store.getBoolean("displayLocationPermissionForCardView", true)) {
-                        // Still ask for permission
-                        DialogUtil.showAlertDialog(getActivity(),
-                                getString(R.string.nearby_card_permission_title),
-                                getString(R.string.nearby_card_permission_explanation),
-                                this::displayYouWontSeeNearbyMessage,
-                                this::enableLocationPermission,
-                                checkBoxView,
-                                false);
-                    }
-                }
-            }
-            break;
-
-            default:
-                // This is needed to allow the request codes from the Fragments to be routed appropriately
-                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
-        }
-    }
     /**
      * Replace whatever is in the current contributionsFragmentContainer view with
      * mediaDetailPagerFragment, and preserve previous state in back stack.
@@ -496,7 +466,7 @@ public class ContributionsFragment
 
 
         if (store.getBoolean("displayNearbyCardView", true)) {
-            checkGPS();
+            checkPermissionsAndShowNearbyCardView();
             if (nearbyNotificationCardView.cardViewVisibilityState == NearbyNotificationCardView.CardViewVisibilityState.READY) {
                 nearbyNotificationCardView.setVisibility(View.VISIBLE);
             }
@@ -509,77 +479,39 @@ public class ContributionsFragment
         fetchCampaigns();
     }
 
-    /**
-     * Check GPS to decide displaying request permission button or not.
-     */
-    private void checkGPS() {
-        if (!locationManager.isProviderEnabled()) {
-            Timber.d("GPS is not enabled");
-            nearbyNotificationCardView.permissionType = NearbyNotificationCardView.PermissionType.ENABLE_GPS;
-            if (store.getBoolean("displayLocationPermissionForCardView", true)) {
-                DialogUtil.showAlertDialog(getActivity(),
-                        getString(R.string.nearby_card_permission_title),
-                        getString(R.string.nearby_card_permission_explanation),
-                        this::displayYouWontSeeNearbyMessage,
-                        this::enableGPS,
-                        checkBoxView,
-                        false);
-            }
-        } else {
-            Timber.d("GPS is enabled");
-            checkLocationPermission();
+    private void checkPermissionsAndShowNearbyCardView() {
+        if (PermissionUtils.hasPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION)) {
+            onLocationPermissionGranted();
+        } else if (shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_FINE_LOCATION)
+                && store.getBoolean("displayLocationPermissionForCardView", true)
+                && (((MainActivity) getActivity()).viewPager.getCurrentItem() == CONTRIBUTIONS_TAB_POSITION)) {
+            nearbyNotificationCardView.permissionType = NearbyNotificationCardView.PermissionType.ENABLE_LOCATION_PERMISSION;
+            showNearbyCardPermissionRationale();
         }
     }
 
-    private void checkLocationPermission() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-            if (locationManager.isLocationPermissionGranted(requireContext())) {
-                nearbyNotificationCardView.permissionType = NearbyNotificationCardView.PermissionType.NO_PERMISSION_NEEDED;
-                locationManager.registerLocationManager();
-            } else {
-                nearbyNotificationCardView.permissionType = NearbyNotificationCardView.PermissionType.ENABLE_LOCATION_PERMISSION;
-                // If user didn't selected Don't ask again
-                if (shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_FINE_LOCATION)
-                        && store.getBoolean("displayLocationPermissionForCardView", true)) {
-                        DialogUtil.showAlertDialog(getActivity(),
-                                getString(R.string.nearby_card_permission_title),
-                                getString(R.string.nearby_card_permission_explanation),
-                                this::displayYouWontSeeNearbyMessage,
-                                this::enableLocationPermission,
-                                checkBoxView,
-                                false);
-                }
-            }
-        } else {
-            // If device is under Marshmallow, we already checked for GPS
-            nearbyNotificationCardView.permissionType = NearbyNotificationCardView.PermissionType.NO_PERMISSION_NEEDED;
-            locationManager.registerLocationManager();
-        }
+    private void requestLocationPermission() {
+        PermissionUtils.checkPermissionsAndPerformAction(getActivity(),
+                Manifest.permission.ACCESS_FINE_LOCATION,
+                this::onLocationPermissionGranted,
+                this::displayYouWontSeeNearbyMessage,
+                -1,
+                -1);
     }
 
-    private void enableLocationPermission() {
-        if (!getActivity().isFinishing()) {
-            ((MainActivity) getActivity()).locationManager.requestPermissions(getActivity());
-        }
+    private void onLocationPermissionGranted() {
+        nearbyNotificationCardView.permissionType = NearbyNotificationCardView.PermissionType.NO_PERMISSION_NEEDED;
+        locationManager.registerLocationManager();
     }
 
-    private void enableGPS() {
-        new AlertDialog.Builder(getActivity())
-                .setMessage(R.string.gps_disabled)
-                .setCancelable(false)
-                .setPositiveButton(R.string.enable_gps,
-                        (dialog, id) -> {
-                            Intent callGPSSettingIntent = new Intent(
-                                    android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
-                            Timber.d("Loaded settings page");
-                            ((MainActivity) getActivity()).startActivityForResult(callGPSSettingIntent, 1);
-                        })
-                .setNegativeButton(R.string.menu_cancel_upload, (dialog, id) -> {
-                    dialog.cancel();
-                    displayYouWontSeeNearbyMessage();
-                })
-                .create()
-                .show();
+    private void showNearbyCardPermissionRationale() {
+        DialogUtil.showAlertDialog(getActivity(),
+                getString(R.string.nearby_card_permission_title),
+                getString(R.string.nearby_card_permission_explanation),
+                this::displayYouWontSeeNearbyMessage,
+                this::requestLocationPermission,
+                checkBoxView,
+                false);
     }
 
     private void displayYouWontSeeNearbyMessage() {
@@ -589,7 +521,6 @@ public class ContributionsFragment
 
     private void updateClosestNearbyCardViewInfo() {
         curLatLng = locationManager.getLastLocation();
-
         compositeDisposable.add(Observable.fromCallable(() -> nearbyController
                 .loadAttractionsFromLocation(curLatLng, curLatLng, true, false)) // thanks to boolean, it will only return closest result
                 .subscribeOn(Schedulers.io())

app/src/main/java/fr/free/nrw/commons/contributions/MainActivity.java

@@ -45,7 +45,6 @@ import io.reactivex.schedulers.Schedulers;
 import timber.log.Timber;
 
 import static android.content.ContentResolver.requestSync;
-import static fr.free.nrw.commons.location.LocationServiceManager.LOCATION_REQUEST;
 
 public class MainActivity extends AuthenticatedActivity implements FragmentManager.OnBackStackChangedListener {
 
@@ -68,8 +67,8 @@ public class MainActivity extends AuthenticatedActivity implements FragmentManag
     public boolean isAuthCookieAcquired = false;
 
     public ContributionsActivityPagerAdapter contributionsActivityPagerAdapter;
-    public final int CONTRIBUTIONS_TAB_POSITION = 0;
-    public final int NEARBY_TAB_POSITION = 1;
+    public static final int CONTRIBUTIONS_TAB_POSITION = 0;
+    public static final int NEARBY_TAB_POSITION = 1;
 
     public boolean isContributionsFragmentVisible = true; // False means nearby fragment is visible
     private Menu menu;
@@ -361,12 +360,6 @@ public class MainActivity extends AuthenticatedActivity implements FragmentManag
         }
     }
 
-    private boolean deviceHasCamera() {
-        PackageManager pm = getPackageManager();
-        return pm.hasSystemFeature(PackageManager.FEATURE_CAMERA) ||
-                pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT);
-    }
-
     public class ContributionsActivityPagerAdapter extends FragmentPagerAdapter {
         FragmentManager fragmentManager;
         private boolean isContributionsListFragment = true; // to know what to put in first tab, Contributions of Media Details
@@ -450,15 +443,6 @@ public class MainActivity extends AuthenticatedActivity implements FragmentManag
             return "android:switcher:" + viewId + ":" + index;
         }
 
-        /**
-         * In first tab we can have ContributionsFragment or Media details fragment. This method
-         * is responsible to update related boolean
-         * @param isContributionsListFragment true when contribution fragment should be visible, false
-         *                                means user clicked to MediaDetails
-         */
-        private void updateContributionFragmentTabContent(boolean isContributionsListFragment) {
-            this.isContributionsListFragment = isContributionsListFragment;
-        }
     }
 
     @Override
@@ -468,27 +452,6 @@ public class MainActivity extends AuthenticatedActivity implements FragmentManag
         controller.handleActivityResult(this, requestCode, resultCode, data);
     }
 
-    @Override
-    public void onRequestPermissionsResult(int requestCode,
-                                           String[] permissions, int[] grantResults) {
-        if (requestCode == LOCATION_REQUEST) {
-            // If request is cancelled, the result arrays are empty.
-            if (grantResults.length > 0
-                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                Timber.d("Location permission given");
-                ((ContributionsFragment)contributionsActivityPagerAdapter
-                        .getItem(0)).locationManager.registerLocationManager();
-            } else {
-                // If nearby fragment is visible and location permission is not given, send user back to contrib fragment
-                if (!isContributionsFragmentVisible) {
-                    viewPager.setCurrentItem(CONTRIBUTIONS_TAB_POSITION);
-
-                    // TODO: If contrib fragment is visible and location permission is not given, display permission request button
-                }
-            }
-        }
-    }
-
     @Override
     protected void onResume() {
         super.onResume();

app/src/main/java/fr/free/nrw/commons/location/LocationServiceManager.java

@@ -1,19 +1,12 @@
 package fr.free.nrw.commons.location;
 
-import android.Manifest;
-import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.Context;
-import android.content.pm.PackageManager;
 import android.location.Location;
 import android.location.LocationListener;
 import android.location.LocationManager;
 import android.os.Bundle;
 
-import androidx.annotation.NonNull;
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -44,78 +37,6 @@ public class LocationServiceManager implements LocationListener {
         this.locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
     }
 
-    /**
-     * Returns the current status of the location provider.
-     *
-     * @return true if the location provider is enabled
-     */
-    public boolean isProviderEnabled() {
-        return (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) || locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER));
-    }
-
-    /**
-     * Returns whether the location permission is granted.
-     * @return true if the location permission is granted
-     */
-    public boolean isLocationPermissionGranted(@NonNull Context context) {
-        return ContextCompat.checkSelfPermission(context,
-                Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED;
-    }
-
-    /**
-     * Requests the location permission to be granted.
-     *
-     * @param activity the activity
-     */
-    public void requestPermissions(Activity activity) {
-        if (activity.isFinishing()) {
-            return;
-        }
-        ActivityCompat.requestPermissions(activity,
-                new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
-                LOCATION_REQUEST);
-    }
-
-    /**
-     * The permission explanation dialog box is now displayed just once for a particular activity. We are subscribing
-     * to updates from multiple providers so its important to show the dialog just once. Otherwise it will be displayed
-     * once for every provider, which in our case currently is 2.
-     * @param activity
-     * @return
-     */
-    public boolean isPermissionExplanationRequired(Activity activity) {
-        if (activity.isFinishing()) {
-            return false;
-        }
-        boolean showRequestPermissionRationale = ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.ACCESS_FINE_LOCATION);
-        if (showRequestPermissionRationale && !locationExplanationDisplayed.contains(activity)) {
-            locationExplanationDisplayed.add(activity);
-            return true;
-        }
-        return false;
-    }
-
-    /**
-     * Gets the last known location in cases where there wasn't time to register a listener
-     * (e.g. when Location permission just granted)
-     * @return last known LatLng
-     */
-    @SuppressLint("MissingPermission")
-    public LatLng getLKL(@NonNull Context context) {
-        if (isLocationPermissionGranted(context)) {
-            Location lastKL = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
-            if (lastKL == null) {
-                lastKL = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
-            }
-            if (lastKL == null) {
-                return null;
-            }
-            return LatLng.from(lastKL);
-        } else {
-            return null;
-        }
-    }
-
     public LatLng getLastLocation() {
         if (lastLocation == null) {
             return null;

app/src/main/java/fr/free/nrw/commons/nearby/NearbyFragment.java

@@ -1,20 +1,11 @@
 package fr.free.nrw.commons.nearby;
 
+import android.Manifest;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
-import android.os.Build;
 import android.os.Bundle;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.constraintlayout.widget.ConstraintLayout;
-import com.google.android.material.bottomsheet.BottomSheetBehavior;
-import com.google.android.material.snackbar.Snackbar;
-
-import androidx.fragment.app.FragmentManager;
-import androidx.fragment.app.FragmentTransaction;
-import androidx.appcompat.app.AlertDialog;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -22,12 +13,19 @@ import android.widget.FrameLayout;
 import android.widget.LinearLayout;
 import android.widget.ProgressBar;
 
+import com.google.android.material.bottomsheet.BottomSheetBehavior;
+import com.google.android.material.snackbar.Snackbar;
 import com.google.gson.Gson;
 
 import java.util.List;
 
 import javax.inject.Inject;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.constraintlayout.widget.ConstraintLayout;
+import androidx.fragment.app.FragmentManager;
+import androidx.fragment.app.FragmentTransaction;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import fr.free.nrw.commons.R;
@@ -38,6 +36,7 @@ import fr.free.nrw.commons.location.LocationServiceManager;
 import fr.free.nrw.commons.location.LocationUpdateListener;
 import fr.free.nrw.commons.utils.FragmentUtils;
 import fr.free.nrw.commons.utils.NetworkUtils;
+import fr.free.nrw.commons.utils.PermissionUtils;
 import fr.free.nrw.commons.utils.ViewUtil;
 import fr.free.nrw.commons.wikidata.WikidataEditListener;
 import io.reactivex.Observable;
@@ -45,6 +44,8 @@ import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.schedulers.Schedulers;
 import timber.log.Timber;
 
+import static fr.free.nrw.commons.contributions.MainActivity.CONTRIBUTIONS_TAB_POSITION;
+import static fr.free.nrw.commons.contributions.MainActivity.NEARBY_TAB_POSITION;
 import static fr.free.nrw.commons.location.LocationServiceManager.LocationChangeType.LOCATION_SIGNIFICANTLY_CHANGED;
 import static fr.free.nrw.commons.location.LocationServiceManager.LocationChangeType.LOCATION_SLIGHTLY_CHANGED;
 import static fr.free.nrw.commons.location.LocationServiceManager.LocationChangeType.MAP_UPDATED;
@@ -193,8 +194,8 @@ public class NearbyFragment extends CommonsDaggerSupportFragment
         bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
 
             @Override
-            public void onStateChanged(View bottomSheet, int newState) {
-                prepareViewsForSheetPosition(newState);
+            public void onStateChanged(View bottomSheet, int unusedNewState) {
+                prepareViewsForSheetPosition();
             }
 
             @Override
@@ -210,9 +211,8 @@ public class NearbyFragment extends CommonsDaggerSupportFragment
 
     /**
      * Sets camera position, zoom level according to sheet positions
-     * @param bottomSheetState expanded, collapsed or hidden
      */
-    public void prepareViewsForSheetPosition(int bottomSheetState) {
+    private void prepareViewsForSheetPosition() {
         // TODO
     }
 
@@ -246,7 +246,7 @@ public class NearbyFragment extends CommonsDaggerSupportFragment
      *
      * @param locationChangeType defines if location changed significantly or slightly
      */
-    public void refreshView(LocationServiceManager.LocationChangeType locationChangeType) {
+    private void refreshView(LocationServiceManager.LocationChangeType locationChangeType) {
         Timber.d("Refreshing nearby places");
         if (lockNearbyView) {
             return;
@@ -324,7 +324,7 @@ public class NearbyFragment extends CommonsDaggerSupportFragment
      * button. It populates places for custom location.
      * @param customLatLng Custom area which we will search around
      */
-    public void refreshViewForCustomLocation(LatLng customLatLng, boolean refreshForCurrentLocation) {
+    void refreshViewForCustomLocation(LatLng customLatLng, boolean refreshForCurrentLocation) {
         if (customLatLng == null) {
             // If null, return
             return;
@@ -568,130 +568,7 @@ public class NearbyFragment extends CommonsDaggerSupportFragment
      * This method first checks if the location permissions has been granted and then register the location manager for updates.
      */
     private void registerLocationUpdates() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-            if (locationManager.isLocationPermissionGranted(requireContext())) {
-                locationManager.registerLocationManager();
-            } else {
-                // Should we show an explanation?
-                if (locationManager.isPermissionExplanationRequired(getActivity())) {
-                    new AlertDialog.Builder(getActivity())
-                            .setMessage(getString(R.string.location_permission_rationale_nearby))
-                            .setPositiveButton(android.R.string.ok, (dialog, which) -> {
-                                requestLocationPermissions();
-                                dialog.dismiss();
-                            })
-                            .setNegativeButton(android.R.string.cancel, (dialog, id) -> {
-                                showLocationPermissionDeniedErrorDialog();
-                                dialog.cancel();
-                            })
-                            .create()
-                            .show();
-
-                } else {
-                    // No explanation needed, we can request the permission.
-                    requestLocationPermissions();
-                }
-            }
-        } else {
-            locationManager.registerLocationManager();
-        }
-    }
-
-    /**
-     * Requests location permission if activity is not null
-     */
-    private void requestLocationPermissions() {
-        if (!getActivity().isFinishing()) {
-            locationManager.requestPermissions(getActivity());
-        }
-    }
-
-    /**
-     * Will warn user if location is denied
-     */
-    private void showLocationPermissionDeniedErrorDialog() {
-        new AlertDialog.Builder(getActivity())
-                .setMessage(R.string.nearby_needs_permissions)
-                .setCancelable(false)
-                .setPositiveButton(R.string.give_permission, (dialog, which) -> {
-                    //will ask for the location permission again
-                    checkGps();
-                })
-                .setNegativeButton(R.string.cancel, (dialog, which) -> {
-                    //dismiss dialog and send user to contributions tab instead
-                    dialog.cancel();
-                    ((MainActivity)getActivity()).viewPager.setCurrentItem(((MainActivity)getActivity()).CONTRIBUTIONS_TAB_POSITION);
-                })
-                .create()
-                .show();
-    }
-
-    /**
-     * Checks device GPS permission first for all API levels
-     */
-    private void checkGps() {
-        Timber.d("checking GPS");
-        if (!locationManager.isProviderEnabled()) {
-            Timber.d("GPS is not enabled");
-            new AlertDialog.Builder(getActivity())
-                    .setMessage(R.string.gps_disabled)
-                    .setCancelable(false)
-                    .setPositiveButton(R.string.enable_gps,
-                            (dialog, id) -> {
-                                Intent callGPSSettingIntent = new Intent(
-                                        android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
-                                Timber.d("Loaded settings page");
-                                startActivityForResult(callGPSSettingIntent, 1);
-                            })
-                    .setNegativeButton(R.string.menu_cancel_upload, (dialog, id) -> {
-                        showLocationPermissionDeniedErrorDialog();
-                        dialog.cancel();
-                    })
-                    .create()
-                    .show();
-        } else {
-            Timber.d("GPS is enabled");
-            checkLocationPermission();
-        }
-    }
-
-    /**
-     * This method ideally should be called from inside of CheckGPS method. If device GPS is enabled
-     * then we need to control app specific permissions for >=M devices. For other devices, enabled
-     * GPS is enough for nearby, so directly call refresh view.
-     */
-    private void checkLocationPermission() {
-        Timber.d("Checking location permission");
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-            if (locationManager.isLocationPermissionGranted(requireContext())) {
-                refreshView(LOCATION_SIGNIFICANTLY_CHANGED);
-            } else {
-                // Should we show an explanation?
-                if (locationManager.isPermissionExplanationRequired(getActivity())) {
-                    // Show an explanation to the user *asynchronously* -- don't block
-                    // this thread waiting for the user's response! After the user
-                    // sees the explanation, try again to request the permission.
-                    new AlertDialog.Builder(getActivity())
-                            .setMessage(getString(R.string.location_permission_rationale_nearby))
-                            .setPositiveButton(android.R.string.ok, (dialog, which) -> {
-                                requestLocationPermissions();
-                                dialog.dismiss();
-                            })
-                            .setNegativeButton(android.R.string.cancel, (dialog, id) -> {
-                                showLocationPermissionDeniedErrorDialog();
-                                dialog.cancel();
-                            })
-                            .create()
-                            .show();
-
-                } else {
-                    // No explanation needed, we can request the permission.
-                    requestLocationPermissions();
-                }
-            }
-        } else {
-            refreshView(LOCATION_SIGNIFICANTLY_CHANGED);
-        }
+        locationManager.registerLocationManager();
     }
 
     private void showErrorMessage(String message) {
@@ -748,8 +625,12 @@ public class NearbyFragment extends CommonsDaggerSupportFragment
     public void onResume() {
         super.onResume();
         // Resume the fragment if exist
-        resumeFragment();
+        if (((MainActivity) getActivity()).viewPager.getCurrentItem() == NEARBY_TAB_POSITION) {
+            checkPermissionsAndPerformAction(this::resumeFragment);
+        } else {
+            resumeFragment();
         }
+    }
 
     /**
      * Perform nearby operations on nearby tab selected
@@ -758,8 +639,16 @@ public class NearbyFragment extends CommonsDaggerSupportFragment
     public void onTabSelected(boolean onOrientationChanged) {
         Timber.d("On nearby tab selected");
         this.onOrientationChanged = onOrientationChanged;
-        performNearbyOperations();
+        checkPermissionsAndPerformAction(this::performNearbyOperations);
+    }
 
+    private void checkPermissionsAndPerformAction(Runnable runnable) {
+        PermissionUtils.checkPermissionsAndPerformAction(getActivity(),
+                Manifest.permission.ACCESS_FINE_LOCATION,
+                runnable,
+                () -> ((MainActivity) getActivity()).viewPager.setCurrentItem(CONTRIBUTIONS_TAB_POSITION),
+                R.string.location_permission_title,
+                R.string.location_permission_rationale_nearby);
     }
 
     /**
@@ -769,8 +658,8 @@ public class NearbyFragment extends CommonsDaggerSupportFragment
         locationManager.addLocationListener(this);
         registerLocationUpdates();
         lockNearbyView = false;
-        checkGps();
         addNetworkBroadcastReceiver();
+        refreshView(LOCATION_SIGNIFICANTLY_CHANGED);
     }
 
     @Override

app/src/main/java/fr/free/nrw/commons/utils/PermissionUtils.java

@@ -5,17 +5,17 @@ import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.provider.Settings;
-import androidx.annotation.StringRes;
-import androidx.core.content.ContextCompat;
 
 import androidx.annotation.StringRes;
 import androidx.core.content.ContextCompat;
+
 import com.karumi.dexter.Dexter;
 import com.karumi.dexter.PermissionToken;
 import com.karumi.dexter.listener.PermissionDeniedResponse;
 import com.karumi.dexter.listener.PermissionGrantedResponse;
 import com.karumi.dexter.listener.PermissionRequest;
 import com.karumi.dexter.listener.single.BasePermissionListener;
+
 import fr.free.nrw.commons.CommonsApplication;
 import fr.free.nrw.commons.R;
 
@@ -27,7 +27,7 @@ public class PermissionUtils {
      It open the app settings from where the user can manually give us the required permission.
      * @param activity
      */
-    public static void askUserToManuallyEnablePermissionFromSettings(Activity activity) {
+    private static void askUserToManuallyEnablePermissionFromSettings(Activity activity) {
         Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
         Uri uri = Uri.fromParts("package", activity.getPackageName(), null);
         intent.setData(uri);
@@ -50,6 +50,9 @@ public class PermissionUtils {
      * Checks for a particular permission and runs the runnable to perform an action when the permission is granted
      * Also, it shows a rationale if needed
      *
+     * rationaleTitle and rationaleMessage can be invalid @StringRes. If the value is -1 then no permission rationale
+     * will be displayed and permission would be requested
+     *
      * Sample usage:
      *
      * PermissionUtils.checkPermissionsAndPerformAction(activity,
@@ -58,12 +61,20 @@ public class PermissionUtils {
      *                 R.string.storage_permission_title,
      *                 R.string.write_storage_permission_rationale);
      *
+     * If you don't want the permission rationale to be shown then use:
+     *
+     * PermissionUtils.checkPermissionsAndPerformAction(activity,
+     *                 Manifest.permission.WRITE_EXTERNAL_STORAGE,
+     *                 () -> initiateCameraUpload(activity),
+     *                 - 1, -1);
+     *
+     *
      *
      * @param activity activity requesting permissions
      * @param permission the permission being requests
      * @param onPermissionGranted the runnable to be executed when the permission is granted
-     * @param rationaleTitle rationale title to be displayed when permission was denied
-     * @param rationaleMessage rationale message to be displayed when permission was denied
+     * @param rationaleTitle rationale title to be displayed when permission was denied. It can be an invalid @StringRes
+     * @param rationaleMessage rationale message to be displayed when permission was denied. It can be an invalid @StringRes
      */
     public static void checkPermissionsAndPerformAction(Activity activity, String permission,
         Runnable onPermissionGranted, @StringRes int rationaleTitle,
@@ -93,7 +104,6 @@ public class PermissionUtils {
      * @param rationaleTitle rationale title to be displayed when permission was denied
      * @param rationaleMessage rationale message to be displayed when permission was denied
      */
-
     public static void checkPermissionsAndPerformAction(Activity activity, String permission,
         Runnable onPermissionGranted, Runnable onPermissionDenied, @StringRes int rationaleTitle,
         @StringRes int rationaleMessage) {
@@ -120,6 +130,10 @@ public class PermissionUtils {
                 @Override
                 public void onPermissionRationaleShouldBeShown(PermissionRequest permission,
                     PermissionToken token) {
+                    if (rationaleTitle == -1 && rationaleMessage == -1) {
+                        token.continuePermissionRequest();
+                        return;
+                    }
                     DialogUtil.showAlertDialog(activity, activity.getString(rationaleTitle),
                         activity.getString(rationaleMessage),
                         activity.getString(android.R.string.ok),
@@ -129,4 +143,5 @@ public class PermissionUtils {
             })
             .check();
     }
+
 }

app/src/main/res/values/strings.xml

@@ -166,6 +166,7 @@
   <string name="storage_permission_title">Requesting Storage Permission</string>
   <string name="read_storage_permission_rationale">Required permission: Read external storage. App cannot access your gallery without this.</string>
   <string name="write_storage_permission_rationale">Required permission: Write external storage. App cannot access your camera/gallery without this.</string>
+  <string name="location_permission_title">Requesting Location Permission</string>
   <string name="location_permission_rationale">Optional permission: Get current location for category suggestions</string>
   <string name="ok">OK</string>
   <string name="title_activity_nearby">Nearby Places</string>