5196: Fix location stripped from EXIF metadata (#5227)

* MainActivity: add ACCESS_MEDIA_LOCATION permission check to retain location info in EXIF metadata

* remove redundant permission check and optimise imports

* FilePicker: switch to ACTION_OPEN_DOCUMENT intent for opening image files

* add a comment explaining the change

* implement GET_CONTENT photo picker toggle switch

* add location loss warning pop up

* SettingsFragment: modify the comment about GET_CONTENT takeover for more clarity

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

@@ -3,12 +3,9 @@ package fr.free.nrw.commons.contributions;
 import static fr.free.nrw.commons.wikidata.WikidataConstants.PLACE_OBJECT;
 
 import android.Manifest;
-import android.Manifest.permission;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
-import android.os.Build.VERSION;
-import android.os.Build.VERSION_CODES;
 import androidx.annotation.NonNull;
 import fr.free.nrw.commons.R;
 import fr.free.nrw.commons.filepicker.DefaultCallback;
@@ -70,15 +67,6 @@ public class ContributionController {
         PermissionUtils.checkPermissionsAndPerformAction(activity,
             Manifest.permission.WRITE_EXTERNAL_STORAGE,
             () -> {
-                if (VERSION.SDK_INT >= VERSION_CODES.Q) {
-                    PermissionUtils.checkPermissionsAndPerformAction(
-                        activity,
-                        permission.ACCESS_MEDIA_LOCATION,
-                        () -> {},
-                        R.string.media_location_permission_denied,
-                        R.string.add_location_manually
-                    );
-                }
                 FilePicker.openCustomSelector(activity, 0);
             },
             R.string.storage_permission_title,
@@ -91,7 +79,8 @@ public class ContributionController {
      */
     private void initiateGalleryUpload(final Activity activity, final boolean allowMultipleUploads) {
         setPickerConfiguration(activity, allowMultipleUploads);
-        FilePicker.openGallery(activity, 0);
+        boolean isGetContentPickerPreferred = defaultKvStore.getBoolean("getContentPhotoPickerPref");
+        FilePicker.openGallery(activity, 0, isGetContentPickerPreferred);
     }
 
     /**

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

@@ -5,7 +5,6 @@ import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.pm.PackageManager;
 import android.os.Build.VERSION;
 import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
@@ -152,6 +151,20 @@ public class MainActivity  extends BaseActivity
                 }
             }
             setUpPager();
+            /**
+             * Ask the user for media location access just after login
+             * so that location in the EXIF metadata of the images shared by the user
+             * is retained on devices running Android 10 or above
+             */
+            if (VERSION.SDK_INT >= VERSION_CODES.Q) {
+                PermissionUtils.checkPermissionsAndPerformAction(
+                    this,
+                    permission.ACCESS_MEDIA_LOCATION,
+                    () -> {},
+                    R.string.media_location_permission_denied,
+                    R.string.add_location_manually
+                );
+            }
         }
     }
 

app/src/main/java/fr/free/nrw/commons/filepicker/FilePicker.java

@@ -46,10 +46,11 @@ public class FilePicker implements Constants {
         return uri;
     }
 
-    private static Intent createGalleryIntent(@NonNull Context context, int type) {
+    private static Intent createGalleryIntent(@NonNull Context context, int type,
+                                              boolean isGetContentPickerPreferred) {
         // storing picked image type to shared preferences
         storeType(context, type);
-        return plainGalleryPickerIntent()
+        return plainGalleryPickerIntent(isGetContentPickerPreferred)
                 .putExtra(Intent.EXTRA_ALLOW_MULTIPLE, configuration(context).allowsMultiplePickingInGallery());
     }
 
@@ -105,8 +106,8 @@ public class FilePicker implements Constants {
      *
      * @param type Custom type of your choice, which will be returned with the images
      */
-    public static void openGallery(Activity activity, int type) {
+    public static void openGallery(Activity activity, int type, boolean isGetContentPickerPreferred) {
-        Intent intent = createGalleryIntent(activity, type);
+        Intent intent = createGalleryIntent(activity, type, isGetContentPickerPreferred);
         activity.startActivityForResult(intent, RequestCodes.PICK_PICTURE_FROM_GALLERY);
     }
 
@@ -200,8 +201,40 @@ public class FilePicker implements Constants {
         return data == null || (data.getData() == null && data.getClipData() == null);
     }
 
-    private static Intent plainGalleryPickerIntent() {
+    private static Intent plainGalleryPickerIntent(boolean isGetContentPickerPreferred) {
-        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+        /**
+         * Asking for ACCESS_MEDIA_LOCATION at runtime solved the location-loss issue
+         * in the custom selector in Contributions fragment.
+         * Detailed discussion: https://github.com/commons-app/apps-android-commons/issues/5015
+         *
+         * This permission check, however, was insufficient to fix location-loss in
+         * the regular selector in Contributions fragment and Nearby fragment,
+         * especially on some devices running Android 13 that use the new Photo Picker by default.
+         *
+         * New Photo Picker: https://developer.android.com/training/data-storage/shared/photopicker
+         *
+         * The new Photo Picker introduced by Android redacts location tags from EXIF metadata.
+         * Reported on the Google Issue Tracker: https://issuetracker.google.com/issues/243294058
+         * Status: Won't fix (Intended behaviour)
+         *
+         * Switched intent from ACTION_GET_CONTENT to ACTION_OPEN_DOCUMENT
+         * (based on user's preference) as:
+         *
+         * ACTION_GET_CONTENT opens the 'best application' for choosing that kind of data
+         * The best application is the new Photo Picker that redacts the location tags
+         *
+         * ACTION_OPEN_DOCUMENT, however,  displays the various DocumentsProvider instances
+         * installed on the device, letting the user interactively navigate through them.
+         *
+         * So, this allows us to use the traditional file picker that does not redact location tags from EXIF.
+         *
+         */
+        Intent intent;
+        if (isGetContentPickerPreferred) {
+            intent = new Intent(Intent.ACTION_GET_CONTENT);
+        } else {
+            intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
+        }
         intent.setType("image/*");
         return intent;
     }

app/src/main/java/fr/free/nrw/commons/settings/SettingsFragment.java

@@ -42,6 +42,7 @@ import fr.free.nrw.commons.recentlanguages.Language;
 import fr.free.nrw.commons.recentlanguages.RecentLanguagesAdapter;
 import fr.free.nrw.commons.recentlanguages.RecentLanguagesDao;
 import fr.free.nrw.commons.upload.LanguagesAdapter;
+import fr.free.nrw.commons.utils.DialogUtil;
 import fr.free.nrw.commons.utils.PermissionUtils;
 import fr.free.nrw.commons.utils.ViewUtil;
 import java.util.HashMap;
@@ -71,6 +72,7 @@ public class SettingsFragment extends PreferenceFragmentCompat {
     private TextView recentLanguagesTextView;
     private View separator;
     private ListView languageHistoryListView;
+    private static final String GET_CONTENT_PICKER_HELP_URL = "https://commons-app.github.io/docs.html#get-content";
 
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
@@ -150,6 +152,17 @@ public class SettingsFragment extends PreferenceFragmentCompat {
             checkPermissionsAndSendLogs();
             return true;
         });
+
+        Preference getContentPickerPreference = findPreference("getContentPhotoPickerPref");
+        getContentPickerPreference.setOnPreferenceChangeListener(
+            (preference, newValue) -> {
+                boolean isGetContentPickerTurnedOn = (boolean) newValue;
+                if (isGetContentPickerTurnedOn) {
+                    showLocationLossWarning();
+                }
+                return true;
+            }
+        );
         // Disable some settings when not logged in.
         if (defaultKvStore.getBoolean("login_skipped", false)) {
             findPreference("useExternalStorage").setEnabled(false);
@@ -162,6 +175,26 @@ public class SettingsFragment extends PreferenceFragmentCompat {
         }
     }
 
+    /**
+     * On some devices, the new Photo Picker with GET_CONTENT takeover
+     * redacts location tags from EXIF metadata
+     *
+     * Show warning to the user when ACTION_GET_CONTENT intent is enabled
+     */
+    private void showLocationLossWarning() {
+        DialogUtil.showAlertDialog(
+            getActivity(),
+            null,
+            getString(R.string.location_loss_warning),
+            getString(R.string.ok),
+            getString(R.string.read_help_link),
+            () -> {},
+            () -> Utils.handleWebUrl(requireContext(), Uri.parse(GET_CONTENT_PICKER_HELP_URL)),
+            null,
+            true
+        );
+    }
+
     @Override
     protected Adapter onCreateAdapter(final PreferenceScreen preferenceScreen) {
         return new PreferenceGroupAdapter(preferenceScreen) {

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

@@ -440,6 +440,9 @@ Upload your first media by tapping on the add button.</string>
   <string name="ends_on">Ends on:</string>
   <string name="display_campaigns">Display campaigns</string>
   <string name="display_campaigns_explanation">See the ongoing campaigns</string>
+  <string name="get_content_photo_picker_title">Use GET_CONTENT photo picker</string>
+  <string name="get_content_photo_picker_explanation">Disable if your pictures get uploaded without location</string>
+  <string name="location_loss_warning">Please make sure that this new Android picker does not strip location from your pictures.</string>
 
   <string name="nearby_campaign_dismiss_message">You won\'t see the campaigns anymore. However, you can re-enable this notification in Settings if you wish.</string>
   <string name="this_function_needs_network_connection">This function requires network connection, please check your connection settings.</string>

app/src/main/res/xml/preferences.xml

@@ -70,6 +70,12 @@
           app:singleLineTitle="false"
           android:summary="@string/display_campaigns_explanation"
           android:title="@string/display_campaigns" />
+
+        <SwitchPreference
+            android:defaultValue="false"
+            android:key="getContentPhotoPickerPref"
+            android:summary="@string/get_content_photo_picker_explanation"
+            android:title="@string/get_content_photo_picker_title"/>
     </PreferenceCategory>
 
     <PreferenceCategory