Merge branch 'wipe-etag-on-language-change' into 'master'

Force repo update after changing language.

See merge request !503

app/src/main/java/org/fdroid/fdroid/data/RepoProvider.java

@@ -286,6 +286,18 @@ public class RepoProvider extends FDroidProvider {
 
             return count;
         }
+
+        /**
+         * Helper method to ensure that next time the user asks for a repository update, we will
+         * fetch the metadata and update regardless of whether the metadata has changed or not.
+         * This is useful for when we change languages, because we need to ask the user to fetch
+         * the metadata again, so that we can extract the correctly-localized metadata.
+         */
+        public static void clearEtags(Context context) {
+            ContentValues values = new ContentValues(1);
+            values.put(Cols.LAST_ETAG, (String) null);
+            context.getContentResolver().update(getContentUri(), values, null, null);
+        }
     }
 
     private static final String PROVIDER_NAME = "RepoProvider";

app/src/main/java/org/fdroid/fdroid/views/fragments/PreferencesFragment.java

@@ -22,6 +22,7 @@ import org.fdroid.fdroid.Languages;
 import org.fdroid.fdroid.Preferences;
 import org.fdroid.fdroid.R;
 import org.fdroid.fdroid.UpdateService;
+import org.fdroid.fdroid.data.RepoProvider;
 import org.fdroid.fdroid.installer.InstallHistoryService;
 import org.fdroid.fdroid.installer.PrivilegedInstaller;
 
@@ -158,6 +159,10 @@ public class PreferencesFragment extends PreferenceFragment
                 if (changing) {
                     Activity activity = getActivity();
                     Languages.setLanguage(activity, Preferences.get().getLanguage(), false);
+
+                    RepoProvider.Helper.clearEtags(getContext());
+                    UpdateService.updateNow(getContext());
+
                     Languages.forceChangeLanguage(activity);
                 }
                 break;