Enable per-app language preferences for Android < 13

app/src/main/AndroidManifest.xml

@@ -57,6 +57,15 @@
             </intent-filter>
         </receiver>
 
+        <service
+            android:name="androidx.appcompat.app.AppLocalesMetadataHolderService"
+            android:enabled="false"
+            android:exported="false">
+            <meta-data
+                android:name="autoStoreLocales"
+                android:value="true" />
+        </service>
+
         <service
             android:name=".player.PlayerService"
             android:exported="true"

app/src/main/java/org/schabi/newpipe/App.java

@@ -102,7 +102,7 @@ public class App extends Application {
         NewPipe.init(getDownloader(),
             Localization.getPreferredLocalization(this),
             Localization.getPreferredContentCountry(this));
-        Localization.initPrettyTime(Localization.resolvePrettyTime(getApplicationContext()));
+        Localization.initPrettyTime(Localization.resolvePrettyTime());
 
         BridgeStateSaverInitializer.init(this);
         StateSaver.init(this);

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -20,8 +20,6 @@
 
 package org.schabi.newpipe;
 
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -142,6 +140,7 @@ public class MainActivity extends AppCompatActivity {
                     + "savedInstanceState = [" + savedInstanceState + "]");
         }
 
+        Localization.migrateAppLanguageSettingIfNecessary(getApplicationContext());
         ThemeHelper.setDayNightMode(this);
         ThemeHelper.setTheme(this, ServiceHelper.getSelectedServiceId(this));
 
@@ -158,7 +157,6 @@ public class MainActivity extends AppCompatActivity {
             }
         }
 
-        assureCorrectAppLanguage(this);
         super.onCreate(savedInstanceState);
         sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
         sharedPrefEditor = sharedPreferences.edit();
@@ -197,7 +195,6 @@ public class MainActivity extends AppCompatActivity {
             UpdateSettingsFragment.askForConsentToUpdateChecks(this);
         }
 
-        Localization.migrateAppLanguageSettingIfNecessary(getApplicationContext());
         SettingMigrations.showUserInfoIfPresent(this);
     }
 
@@ -504,9 +501,8 @@ public class MainActivity extends AppCompatActivity {
 
     @Override
     protected void onResume() {
-        assureCorrectAppLanguage(this);
         // Change the date format to match the selected language on resume
-        Localization.initPrettyTime(Localization.resolvePrettyTime(getApplicationContext()));
+        Localization.initPrettyTime(Localization.resolvePrettyTime());
         super.onResume();
 
         // Close drawer on return, and don't show animation,

app/src/main/java/org/schabi/newpipe/RouterActivity.java

@@ -84,7 +84,6 @@ import org.schabi.newpipe.util.ChannelTabHelper;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.DeviceUtils;
 import org.schabi.newpipe.util.ExtractorHelper;
-import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.PermissionHelper;
 import org.schabi.newpipe.util.ThemeHelper;
@@ -132,7 +131,6 @@ public class RouterActivity extends AppCompatActivity {
         ThemeHelper.setDayNightMode(this);
         setTheme(ThemeHelper.isLightThemeSelected(this)
                 ? R.style.RouterActivityThemeLight : R.style.RouterActivityThemeDark);
-        Localization.assureCorrectAppLanguage(this);
 
         // Pass-through touch events to background activities
         // so that our transparent window won't lock UI in the mean time

app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt

@@ -16,14 +16,12 @@ import org.schabi.newpipe.BuildConfig
 import org.schabi.newpipe.R
 import org.schabi.newpipe.databinding.ActivityAboutBinding
 import org.schabi.newpipe.databinding.FragmentAboutBinding
-import org.schabi.newpipe.util.Localization
 import org.schabi.newpipe.util.ThemeHelper
 import org.schabi.newpipe.util.external_communication.ShareUtils
 
 class AboutActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
-        Localization.assureCorrectAppLanguage(this)
         super.onCreate(savedInstanceState)
         ThemeHelper.setTheme(this)
         title = getString(R.string.title_activity_about)

app/src/main/java/org/schabi/newpipe/about/LicenseFragment.kt

@@ -19,7 +19,6 @@ import org.schabi.newpipe.R
 import org.schabi.newpipe.databinding.FragmentLicensesBinding
 import org.schabi.newpipe.databinding.ItemSoftwareComponentBinding
 import org.schabi.newpipe.ktx.parcelableArrayList
-import org.schabi.newpipe.util.Localization
 import org.schabi.newpipe.util.external_communication.ShareUtils
 
 /**
@@ -100,7 +99,6 @@ class LicenseFragment : Fragment() {
                     val webView = WebView(context)
                     webView.loadData(webViewData, "text/html; charset=UTF-8", "base64")
 
-                    Localization.assureCorrectAppLanguage(context)
                     val builder = AlertDialog.Builder(requireContext())
                         .setTitle(softwareComponent.name)
                         .setView(webView)

app/src/main/java/org/schabi/newpipe/download/DownloadActivity.java

@@ -20,8 +20,6 @@ import org.schabi.newpipe.views.FocusOverlayView;
 import us.shandian.giga.service.DownloadManagerService;
 import us.shandian.giga.ui.fragment.MissionsFragment;
 
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-
 public class DownloadActivity extends AppCompatActivity {
 
     private static final String MISSIONS_FRAGMENT_TAG = "fragment_tag";
@@ -33,7 +31,6 @@ public class DownloadActivity extends AppCompatActivity {
         i.setClass(this, DownloadManagerService.class);
         startService(i);
 
-        assureCorrectAppLanguage(this);
         ThemeHelper.setTheme(this);
 
         super.onCreate(savedInstanceState);

app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java

@@ -2,7 +2,6 @@ package org.schabi.newpipe.download;
 
 import static org.schabi.newpipe.extractor.stream.DeliveryMethod.PROGRESSIVE_HTTP;
 import static org.schabi.newpipe.util.ListHelper.getStreamsOfSpecifiedDelivery;
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
 import android.app.Activity;
 import android.content.ComponentName;
@@ -751,7 +750,6 @@ public class DownloadDialog extends DialogFragment
     }
 
     private void showFailedDialog(@StringRes final int msg) {
-        assureCorrectAppLanguage(requireContext());
         new AlertDialog.Builder(context)
                 .setTitle(R.string.general_error)
                 .setMessage(msg)

app/src/main/java/org/schabi/newpipe/error/ErrorActivity.java

@@ -1,7 +1,5 @@
 package org.schabi.newpipe.error;
 
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
@@ -79,7 +77,6 @@ public class ErrorActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
-        assureCorrectAppLanguage(this);
         super.onCreate(savedInstanceState);
 
         ThemeHelper.setDayNightMode(this);
@@ -306,7 +303,7 @@ public class ErrorActivity extends AppCompatActivity {
     }
 
     private String getAppLanguage() {
-        return Localization.getAppLocale(getApplicationContext()).toString();
+        return Localization.getAppLocale().toString();
     }
 
     private String getOsString() {

app/src/main/java/org/schabi/newpipe/fragments/detail/DescriptionFragment.java

@@ -93,7 +93,7 @@ public class DescriptionFragment extends BaseDescriptionFragment {
 
         if (streamInfo.getLanguageInfo() != null) {
             addMetadataItem(inflater, layout, false, R.string.metadata_language,
-                    streamInfo.getLanguageInfo().getDisplayLanguage(getAppLocale(getContext())));
+                    streamInfo.getLanguageInfo().getDisplayLanguage(getAppLocale()));
         }
 
         addMetadataItem(inflater, layout, true, R.string.metadata_support,

app/src/main/java/org/schabi/newpipe/fragments/list/channel/ChannelAboutFragment.java

@@ -81,9 +81,7 @@ public class ChannelAboutFragment extends BaseDescriptionFragment {
 
         if (channelInfo.getSubscriberCount() != UNKNOWN_SUBSCRIBER_COUNT) {
             addMetadataItem(inflater, layout, false, R.string.metadata_subscribers,
-                    Localization.localizeNumber(
-                            requireContext(),
-                            channelInfo.getSubscriberCount()));
+                    Localization.localizeNumber(channelInfo.getSubscriberCount()));
         }
 
         addImagesMetadataItem(inflater, layout, R.string.metadata_avatars,

app/src/main/java/org/schabi/newpipe/local/subscription/ImportConfirmationDialog.java

@@ -1,7 +1,5 @@
 package org.schabi.newpipe.local.subscription;
 
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-
 import android.app.Dialog;
 import android.content.Intent;
 import android.os.Bundle;
@@ -35,7 +33,6 @@ public class ImportConfirmationDialog extends DialogFragment {
     @NonNull
     @Override
     public Dialog onCreateDialog(@Nullable final Bundle savedInstanceState) {
-        assureCorrectAppLanguage(getContext());
         return new AlertDialog.Builder(requireContext())
                 .setMessage(R.string.import_network_expensive_warning)
                 .setCancelable(true)

app/src/main/java/org/schabi/newpipe/player/PlayQueueActivity.java

@@ -2,7 +2,6 @@ package org.schabi.newpipe.player;
 
 import static org.schabi.newpipe.QueueItemMenuUtil.openPopupMenu;
 import static org.schabi.newpipe.player.helper.PlayerHelper.formatSpeed;
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
 import android.content.ComponentName;
 import android.content.Intent;
@@ -84,7 +83,6 @@ public final class PlayQueueActivity extends AppCompatActivity
 
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
-        assureCorrectAppLanguage(this);
         super.onCreate(savedInstanceState);
         ThemeHelper.setTheme(this, ServiceHelper.getSelectedServiceId(this));
 

app/src/main/java/org/schabi/newpipe/player/Player.java

@@ -44,7 +44,6 @@ import static org.schabi.newpipe.player.notification.NotificationConstants.ACTIO
 import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_SHUFFLE;
 import static org.schabi.newpipe.util.ListHelper.getPopupResolutionIndex;
 import static org.schabi.newpipe.util.ListHelper.getResolutionIndex;
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 
 import android.content.BroadcastReceiver;
@@ -88,8 +87,8 @@ import org.schabi.newpipe.databinding.PlayerBinding;
 import org.schabi.newpipe.error.ErrorInfo;
 import org.schabi.newpipe.error.ErrorUtil;
 import org.schabi.newpipe.error.UserAction;
-import org.schabi.newpipe.extractor.stream.AudioStream;
 import org.schabi.newpipe.extractor.Image;
+import org.schabi.newpipe.extractor.stream.AudioStream;
 import org.schabi.newpipe.extractor.stream.StreamInfo;
 import org.schabi.newpipe.extractor.stream.StreamType;
 import org.schabi.newpipe.extractor.stream.VideoStream;
@@ -120,9 +119,9 @@ import org.schabi.newpipe.player.ui.VideoPlayerUi;
 import org.schabi.newpipe.util.DependentPreferenceHelper;
 import org.schabi.newpipe.util.ListHelper;
 import org.schabi.newpipe.util.NavigationHelper;
-import org.schabi.newpipe.util.image.PicassoHelper;
 import org.schabi.newpipe.util.SerializedCache;
 import org.schabi.newpipe.util.StreamTypeUtil;
+import org.schabi.newpipe.util.image.PicassoHelper;
 
 import java.util.List;
 import java.util.Optional;
@@ -753,7 +752,6 @@ public final class Player implements PlaybackListener, Listener {
                 toggleShuffleModeEnabled();
                 break;
             case Intent.ACTION_CONFIGURATION_CHANGED:
-                assureCorrectAppLanguage(service);
                 if (DEBUG) {
                     Log.d(TAG, "ACTION_CONFIGURATION_CHANGED received");
                 }

app/src/main/java/org/schabi/newpipe/player/PlayerService.java

@@ -19,8 +19,6 @@
 
 package org.schabi.newpipe.player;
 
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-
 import android.content.Context;
 import android.content.Intent;
 import android.os.Binder;
@@ -91,7 +89,6 @@ public final class PlayerService extends MediaBrowserServiceCompat {
         if (DEBUG) {
             Log.d(TAG, "onCreate() called");
         }
-        assureCorrectAppLanguage(this);
         ThemeHelper.setTheme(this);
 
         mediaBrowserImpl = new MediaBrowserImpl(this, this::notifyChildrenChanged);

app/src/main/java/org/schabi/newpipe/player/helper/PlaybackParameterDialog.java

@@ -2,7 +2,6 @@ package org.schabi.newpipe.player.helper;
 
 import static org.schabi.newpipe.ktx.ViewUtils.animateRotation;
 import static org.schabi.newpipe.player.Player.DEBUG;
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 import static org.schabi.newpipe.util.ThemeHelper.resolveDrawable;
 
 import android.app.Dialog;
@@ -145,7 +144,6 @@ public class PlaybackParameterDialog extends DialogFragment {
     @NonNull
     @Override
     public Dialog onCreateDialog(@Nullable final Bundle savedInstanceState) {
-        assureCorrectAppLanguage(getContext());
         Bridge.restoreInstanceState(this, savedInstanceState);
 
         binding = DialogPlaybackParameterBinding.inflate(getLayoutInflater());

app/src/main/java/org/schabi/newpipe/player/mediabrowser/MediaBrowserPlaybackPreparer.kt

@@ -6,6 +6,7 @@ import android.os.Bundle
 import android.os.ResultReceiver
 import android.support.v4.media.session.PlaybackStateCompat
 import android.util.Log
+import androidx.core.content.ContextCompat
 import androidx.core.net.toUri
 import com.google.android.exoplayer2.Player
 import com.google.android.exoplayer2.ext.mediasession.MediaSessionConnector.PlaybackPreparer
@@ -109,14 +110,14 @@ class MediaBrowserPlaybackPreparer(
     //region Errors
     private fun onUnsupportedError() {
         setMediaSessionError.accept(
-            context.getString(R.string.content_not_supported),
+            ContextCompat.getString(context, R.string.content_not_supported),
             PlaybackStateCompat.ERROR_CODE_NOT_SUPPORTED
         )
     }
 
     private fun onPrepareError() {
         setMediaSessionError.accept(
-            context.getString(R.string.error_snackbar_message),
+            ContextCompat.getString(context, R.string.error_snackbar_message),
             PlaybackStateCompat.ERROR_CODE_APP_ERROR
         )
     }

app/src/main/java/org/schabi/newpipe/settings/BackupRestoreSettingsFragment.java

@@ -1,7 +1,6 @@
 package org.schabi.newpipe.settings;
 
 import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
 import android.app.Activity;
 import android.app.AlertDialog;
@@ -126,7 +125,6 @@ public class BackupRestoreSettingsFragment extends BasePreferenceFragment {
     }
 
     private void requestExportPathResult(final ActivityResult result) {
-        assureCorrectAppLanguage(requireContext());
         if (result.getResultCode() == Activity.RESULT_OK && result.getData() != null) {
             // will be saved only on success
             final Uri lastExportDataUri = result.getData().getData();
@@ -139,7 +137,6 @@ public class BackupRestoreSettingsFragment extends BasePreferenceFragment {
     }
 
     private void requestImportPathResult(final ActivityResult result) {
-        assureCorrectAppLanguage(requireContext());
         if (result.getResultCode() == Activity.RESULT_OK && result.getData() != null) {
             // will be saved only on success
             final Uri lastImportDataUri = result.getData().getData();

app/src/main/java/org/schabi/newpipe/settings/ContentSettingsFragment.java

@@ -10,6 +10,7 @@ import android.util.Log;
 import android.widget.Toast;
 
 import androidx.appcompat.app.AppCompatDelegate;
+import androidx.core.os.LocaleListCompat;
 import androidx.preference.Preference;
 
 import org.schabi.newpipe.DownloaderImpl;
@@ -27,26 +28,20 @@ import java.util.Locale;
 public class ContentSettingsFragment extends BasePreferenceFragment {
     private String youtubeRestrictedModeEnabledKey;
 
-    private String initialLanguage;
-
     @Override
     public void onCreatePreferences(final Bundle savedInstanceState, final String rootKey) {
         youtubeRestrictedModeEnabledKey = getString(R.string.youtube_restricted_mode_enabled);
 
         addPreferencesFromResourceRegistry();
 
-        initialLanguage = defaultPreferences.getString(getString(R.string.app_language_key), "en");
-
+        final var appLanguagePref = requirePreference(R.string.app_language_key);
         if (Build.VERSION.SDK_INT >= 33) {
-            requirePreference(R.string.app_language_key).setVisible(false);
-            final Preference newAppLanguagePref =
+            appLanguagePref.setVisible(false);
+            final var newAppLanguagePref =
                     requirePreference(R.string.app_language_android_13_and_up_key);
             newAppLanguagePref.setSummaryProvider(preference -> {
-                final Locale customLocale = AppCompatDelegate.getApplicationLocales().get(0);
-                if (customLocale != null) {
-                    return customLocale.getDisplayName();
-                }
-                return getString(R.string.systems_language);
+                final Locale loc = AppCompatDelegate.getApplicationLocales().get(0);
+                return loc != null ? loc.getDisplayName() : getString(R.string.systems_language);
             });
             newAppLanguagePref.setOnPreferenceClickListener(preference -> {
                 final Intent intent = new Intent(Settings.ACTION_APP_LOCALE_SETTINGS)
@@ -55,10 +50,16 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
                 return true;
             });
             newAppLanguagePref.setVisible(true);
+        } else {
+            appLanguagePref.setOnPreferenceChangeListener((preference, newValue) -> {
+                final String language = (String) newValue;
+                final Locale locale = Locale.forLanguageTag(language);
+                AppCompatDelegate.setApplicationLocales(LocaleListCompat.create(locale));
+                return true;
+            });
         }
 
-        final Preference imageQualityPreference = requirePreference(R.string.image_quality_key);
-        imageQualityPreference.setOnPreferenceChangeListener(
+        requirePreference(R.string.image_quality_key).setOnPreferenceChangeListener(
                 (preference, newValue) -> {
                     ImageStrategy.setPreferredImageQuality(PreferredImageQuality
                             .fromPreferenceKey(requireContext(), (String) newValue));
@@ -92,22 +93,10 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
     public void onDestroy() {
         super.onDestroy();
 
-        final String selectedLanguage =
-                defaultPreferences.getString(getString(R.string.app_language_key), "en");
-
-        if (!selectedLanguage.equals(initialLanguage)) {
-            if (Build.VERSION.SDK_INT < 33) {
-                Toast.makeText(
-                        requireContext(),
-                        R.string.localization_changes_requires_app_restart,
-                        Toast.LENGTH_LONG
-                ).show();
-            }
         final Localization selectedLocalization = org.schabi.newpipe.util.Localization
                 .getPreferredLocalization(requireContext());
         final ContentCountry selectedContentCountry = org.schabi.newpipe.util.Localization
                 .getPreferredContentCountry(requireContext());
         NewPipe.setupLocalization(selectedLocalization, selectedContentCountry);
     }
-    }
 }

app/src/main/java/org/schabi/newpipe/settings/DownloadSettingsFragment.java

@@ -1,7 +1,5 @@
 package org.schabi.newpipe.settings;
 
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-
 import android.app.Activity;
 import android.content.ContentResolver;
 import android.content.Context;
@@ -209,8 +207,6 @@ public class DownloadSettingsFragment extends BasePreferenceFragment {
     }
 
     private void requestDownloadPathResult(final ActivityResult result, final String key) {
-        assureCorrectAppLanguage(getContext());
-
         if (result.getResultCode() != Activity.RESULT_OK) {
             return;
         }

app/src/main/java/org/schabi/newpipe/settings/SettingsActivity.java

@@ -1,7 +1,5 @@
 package org.schabi.newpipe.settings;
 
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-
 import android.content.Context;
 import android.os.Bundle;
 import android.text.TextUtils;
@@ -89,7 +87,6 @@ public class SettingsActivity extends AppCompatActivity implements
     @Override
     protected void onCreate(final Bundle savedInstanceBundle) {
         setTheme(ThemeHelper.getSettingsThemeStyle(this));
-        assureCorrectAppLanguage(this);
 
         super.onCreate(savedInstanceBundle);
         Bridge.restoreInstanceState(this, savedInstanceBundle);
@@ -228,7 +225,6 @@ public class SettingsActivity extends AppCompatActivity implements
 
         // Build search items
         final Context searchContext = getApplicationContext();
-        assureCorrectAppLanguage(searchContext);
         final PreferenceParser parser = new PreferenceParser(searchContext, config);
         final PreferenceSearcher searcher = new PreferenceSearcher(config);
 

app/src/main/java/org/schabi/newpipe/util/ListHelper.java

@@ -322,7 +322,7 @@ public final class ListHelper {
         }
 
         // Sort collected streams by name
-        return collectedStreams.values().stream().sorted(getAudioTrackNameComparator(context))
+        return collectedStreams.values().stream().sorted(getAudioTrackNameComparator())
                 .collect(Collectors.toList());
     }
 
@@ -359,7 +359,7 @@ public final class ListHelper {
         }
 
         // Sort tracks alphabetically, sort track streams by quality
-        final Comparator<AudioStream> nameCmp = getAudioTrackNameComparator(context);
+        final Comparator<AudioStream> nameCmp = getAudioTrackNameComparator();
         final Comparator<AudioStream> formatCmp = getAudioFormatComparator(context);
 
         return collectedStreams.values().stream()
@@ -867,12 +867,10 @@ public final class ListHelper {
      * Get a {@link Comparator} to compare {@link AudioStream}s by their languages and track types
      * for alphabetical sorting.
      *
-     * @param context app context for localization
      * @return Comparator
      */
-    private static Comparator<AudioStream> getAudioTrackNameComparator(
-            @NonNull final Context context) {
-        final Locale appLoc = Localization.getAppLocale(context);
+    private static Comparator<AudioStream> getAudioTrackNameComparator() {
+        final Locale appLoc = Localization.getAppLocale();
 
         return Comparator.comparing(AudioStream::getAudioLocale, Comparator.nullsLast(
                         Comparator.comparing(locale -> locale.getDisplayName(appLoc))))

app/src/main/java/org/schabi/newpipe/util/Localization.java

@@ -5,14 +5,12 @@ import static org.schabi.newpipe.MainActivity.DEBUG;
 import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.icu.text.CompactDecimalFormat;
 import android.os.Build;
+import android.text.BidiFormatter;
 import android.text.TextUtils;
 import android.text.format.DateUtils;
-import android.text.BidiFormatter;
-import android.util.DisplayMetrics;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
@@ -43,7 +41,6 @@ import java.time.format.FormatStyle;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Locale;
-import java.util.Objects;
 import java.util.stream.Collectors;
 
 
@@ -120,39 +117,35 @@ public final class Localization {
         return getLocaleFromPrefs(context, R.string.content_language_key);
     }
 
-    public static Locale getAppLocale(@NonNull final Context context) {
-        if (Build.VERSION.SDK_INT >= 33) {
+    public static Locale getAppLocale() {
         final Locale customLocale = AppCompatDelegate.getApplicationLocales().get(0);
-            return Objects.requireNonNullElseGet(customLocale, Locale::getDefault);
-        }
-        return getLocaleFromPrefs(context, R.string.app_language_key);
+        return customLocale != null ? customLocale : Locale.getDefault();
     }
 
-    public static String localizeNumber(@NonNull final Context context, final long number) {
-        return localizeNumber(context, (double) number);
+    public static String localizeNumber(final long number) {
+        return localizeNumber((double) number);
     }
 
-    public static String localizeNumber(@NonNull final Context context, final double number) {
-        final NumberFormat nf = NumberFormat.getInstance(getAppLocale(context));
+    public static String localizeNumber(final double number) {
+        final NumberFormat nf = NumberFormat.getInstance(getAppLocale());
         return nf.format(number);
     }
 
-    public static String formatDate(@NonNull final Context context,
-                                    @NonNull final OffsetDateTime offsetDateTime) {
+    public static String formatDate(@NonNull final OffsetDateTime offsetDateTime) {
         return DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM)
-                .withLocale(getAppLocale(context)).format(offsetDateTime
+                .withLocale(getAppLocale()).format(offsetDateTime
                         .atZoneSameInstant(ZoneId.systemDefault()));
     }
 
     @SuppressLint("StringFormatInvalid")
     public static String localizeUploadDate(@NonNull final Context context,
                                             @NonNull final OffsetDateTime offsetDateTime) {
-        return context.getString(R.string.upload_date_text, formatDate(context, offsetDateTime));
+        return context.getString(R.string.upload_date_text, formatDate(offsetDateTime));
     }
 
     public static String localizeViewCount(@NonNull final Context context, final long viewCount) {
         return getQuantity(context, R.plurals.views, R.string.no_views, viewCount,
-                localizeNumber(context, viewCount));
+                localizeNumber(viewCount));
     }
 
     public static String localizeStreamCount(@NonNull final Context context,
@@ -166,7 +159,7 @@ public final class Localization {
                 return context.getResources().getString(R.string.more_than_100_videos);
             default:
                 return getQuantity(context, R.plurals.videos, R.string.no_videos, streamCount,
-                        localizeNumber(context, streamCount));
+                        localizeNumber(streamCount));
         }
     }
 
@@ -187,27 +180,27 @@ public final class Localization {
     public static String localizeWatchingCount(@NonNull final Context context,
                                                final long watchingCount) {
         return getQuantity(context, R.plurals.watching, R.string.no_one_watching, watchingCount,
-                localizeNumber(context, watchingCount));
+                localizeNumber(watchingCount));
     }
 
     public static String shortCount(@NonNull final Context context, final long count) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-            return CompactDecimalFormat.getInstance(getAppLocale(context),
+            return CompactDecimalFormat.getInstance(getAppLocale(),
                     CompactDecimalFormat.CompactStyle.SHORT).format(count);
         }
 
         final double value = (double) count;
         if (count >= 1000000000) {
-            return localizeNumber(context, round(value / 1000000000))
+            return localizeNumber(round(value / 1000000000))
                     + context.getString(R.string.short_billion);
         } else if (count >= 1000000) {
-            return localizeNumber(context, round(value / 1000000))
+            return localizeNumber(round(value / 1000000))
                     + context.getString(R.string.short_million);
         } else if (count >= 1000) {
-            return localizeNumber(context, round(value / 1000))
+            return localizeNumber(round(value / 1000))
                     + context.getString(R.string.short_thousand);
         } else {
-            return localizeNumber(context, value);
+            return localizeNumber(value);
         }
     }
 
@@ -377,8 +370,8 @@ public final class Localization {
         prettyTime.removeUnit(Decade.class);
     }
 
-    public static PrettyTime resolvePrettyTime(@NonNull final Context context) {
-        return new PrettyTime(getAppLocale(context));
+    public static PrettyTime resolvePrettyTime() {
+        return new PrettyTime(getAppLocale());
     }
 
     public static String relativeTime(@NonNull final OffsetDateTime offsetDateTime) {
@@ -410,14 +403,6 @@ public final class Localization {
         }
     }
 
-    public static void assureCorrectAppLanguage(final Context c) {
-        final Resources res = c.getResources();
-        final DisplayMetrics dm = res.getDisplayMetrics();
-        final Configuration conf = res.getConfiguration();
-        conf.setLocale(getAppLocale(c));
-        res.updateConfiguration(conf, dm);
-    }
-
     private static Locale getLocaleFromPrefs(@NonNull final Context context,
                                              @StringRes final int prefKey) {
         final SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
@@ -453,23 +438,25 @@ public final class Localization {
     }
 
     public static void migrateAppLanguageSettingIfNecessary(@NonNull final Context context) {
-        // Starting with pull request #12093, NewPipe on Android 13+ exclusively uses Android's
+        // Starting with pull request #12093, NewPipe exclusively uses Android's
         // public per-app language APIs to read and set the UI language for NewPipe.
-        // If running on Android 13+, the following code will migrate any existing custom
-        // app language in SharedPreferences to use the public per-app language APIs instead.
-        if (Build.VERSION.SDK_INT >= 33) {
+        // The following code will migrate any existing custom app language in SharedPreferences to
+        // use the public per-app language APIs instead.
         final SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
         final String appLanguageKey = context.getString(R.string.app_language_key);
         final String appLanguageValue = sp.getString(appLanguageKey, null);
         if (appLanguageValue != null) {
+            // The app language key is used on Android versions < Tiramisu; for more info, see
+            // ContentSettingsFragment.
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
                 sp.edit().remove(appLanguageKey).apply();
+            }
             final String appLanguageDefaultValue =
                     context.getString(R.string.default_localization_key);
             if (!appLanguageValue.equals(appLanguageDefaultValue)) {
                 try {
-                        AppCompatDelegate.setApplicationLocales(
-                                LocaleListCompat.forLanguageTags(appLanguageValue)
-                        );
+                    final var locales = LocaleListCompat.forLanguageTags(appLanguageValue);
+                    AppCompatDelegate.setApplicationLocales(locales);
                 } catch (final RuntimeException e) {
                     Log.e(TAG, "Failed to migrate previous custom app language "
                             + "setting to public per-app language APIs"
@@ -478,5 +465,4 @@ public final class Localization {
             }
         }
     }
-    }
 }