Redirect to per-app language settings on Android 13+

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

@@ -1,10 +1,15 @@
 package org.schabi.newpipe.settings;
 
 import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
+import android.provider.Settings;
 import android.util.Log;
 import android.widget.Toast;
 
+import androidx.appcompat.app.AppCompatDelegate;
 import androidx.preference.Preference;
 
 import org.schabi.newpipe.DownloaderImpl;
@@ -17,6 +22,7 @@ import org.schabi.newpipe.util.image.PicassoHelper;
 import org.schabi.newpipe.util.image.PreferredImageQuality;
 
 import java.io.IOException;
+import java.util.Locale;
 
 public class ContentSettingsFragment extends BasePreferenceFragment {
     private String youtubeRestrictedModeEnabledKey;
@@ -37,6 +43,26 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
                 .getPreferredContentCountry(requireContext());
         initialLanguage = defaultPreferences.getString(getString(R.string.app_language_key), "en");
 
+        if (Build.VERSION.SDK_INT >= 33) {
+            requirePreference(R.string.app_language_key).setVisible(false);
+            final Preference 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);
+            });
+            newAppLanguagePref.setOnPreferenceClickListener(preference -> {
+                final Intent intent = new Intent(Settings.ACTION_APP_LOCALE_SETTINGS)
+                        .setData(Uri.fromParts("package", requireContext().getPackageName(), null));
+                startActivity(intent);
+                return true;
+            });
+            newAppLanguagePref.setVisible(true);
+        }
+
         final Preference imageQualityPreference = requirePreference(R.string.image_quality_key);
         imageQualityPreference.setOnPreferenceChangeListener(
                 (preference, newValue) -> {

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

@@ -17,6 +17,7 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.PluralsRes;
 import androidx.annotation.StringRes;
+import androidx.appcompat.app.AppCompatDelegate;
 import androidx.core.math.MathUtils;
 import androidx.preference.PreferenceManager;
 
@@ -39,6 +40,7 @@ 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;
 
 
@@ -101,6 +103,10 @@ public final class Localization {
     }
 
     public static Locale getAppLocale(@NonNull final Context context) {
+        if (Build.VERSION.SDK_INT >= 33) {
+            final Locale customLocale = AppCompatDelegate.getApplicationLocales().get(0);
+            return Objects.requireNonNullElseGet(customLocale, Locale::getDefault);
+        }
         return getLocaleFromPrefs(context, R.string.app_language_key);
     }
 

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

@@ -353,6 +353,7 @@
     <string name="playback_skip_silence_key">playback_skip_silence_key</string>
 
     <string name="app_language_key">app_language_key</string>
+    <string name="app_language_android_13_and_up_key">app_language_android_13_and_up_key</string>
 
     <string name="feed_update_threshold_key">feed_update_threshold_key</string>
     <string name="feed_update_threshold_default_value">300</string>

app/src/main/res/xml/content_settings.xml

@@ -13,6 +13,13 @@
         app:iconSpaceReserved="false"
         app:useSimpleSummaryProvider="true" />
 
+    <Preference
+        android:key="@string/app_language_android_13_and_up_key"
+        android:title="@string/app_language_title"
+        app:isPreferenceVisible="false"
+        app:singleLineTitle="false"
+        app:iconSpaceReserved="false" />
+
     <ListPreference
         android:defaultValue="@string/default_localization_key"
         android:entries="@array/language_names"