Save language settings permanent.

lib/local_storage/key_value_storage.dart

@@ -36,6 +36,7 @@ const String rewindSecondsKey = 'rewindSecondsKey';
 const String playerHeightKey = 'playerHeightKey';
 const String speedKey = 'speedKey';
 const String skipSilenceKey = 'skipSilenceKey';
+const String localeKey = 'localeKey';
 
 class KeyValueStorage {
   final String key;

lib/settings/languages.dart

@@ -4,6 +4,7 @@ import 'package:intl/intl.dart';
 import 'package:url_launcher/url_launcher.dart';
 
 import '../generated/l10n.dart';
+import '../local_storage/key_value_storage.dart';
 import '../util/extension_helper.dart';
 
 class LanguagesSetting extends StatefulWidget {
@@ -22,6 +23,20 @@ class _LanguagesSettingState extends State<LanguagesSetting> {
     }
   }
 
+  _setLocale(Locale locale, {bool systemDefault = false}) async {
+    var localeStorage = KeyValueStorage(localeKey);
+    if (systemDefault) {
+      await localeStorage.saveStringList([]);
+    } else {
+      await localeStorage
+          .saveStringList([locale.languageCode, locale.countryCode]);
+    }
+    await S.load(locale);
+    if (mounted) {
+      setState(() {});
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final s = context.s;
@@ -44,66 +59,43 @@ class _LanguagesSettingState extends State<LanguagesSetting> {
             children: [
               ListTile(
                 title: Text(s.systemDefault),
-                onTap: () async {
-                  await S.load(Locale(Intl.systemLocale));
-                  setState(() {});
-                },
+                onTap: () =>
+                    _setLocale(Locale(Intl.systemLocale), systemDefault: true),
                 contentPadding: const EdgeInsets.only(left: 75, right: 20),
                 trailing: Radio<Locale>(
                     value: Locale(Intl.systemLocale),
                     groupValue: Locale(Intl.getCurrentLocale()),
-                    onChanged: (locale) async {
-                      await S.load(locale);
-                      setState(() {});
-                    }),
+                    onChanged: (locale) =>
+                        _setLocale(locale, systemDefault: true)),
               ),
               Divider(height: 2),
               ListTile(
                   title: Text('English'),
-                onTap: () async {
-                  await S.load(Locale('en'));
-                  setState(() {});
-                },
+                  onTap: () => _setLocale(Locale('en')),
                   contentPadding: const EdgeInsets.only(left: 75, right: 20),
                   trailing: Radio<Locale>(
                       value: Locale('en'),
                       groupValue: Locale(Intl.getCurrentLocale()),
-                    onChanged: (locale) async {
-                      await S.load(locale);
-                      setState(() {});
-                    }),
-              ),
+                      onChanged: _setLocale)),
               Divider(height: 2),
               ListTile(
                   title: Text('简体中文'),
-                onTap: () async {
-                  await S.load(Locale('zh_Hans'));
-                  setState(() {});
-                },
+                  onTap: () => _setLocale(Locale('zh_Hans')),
                   contentPadding: const EdgeInsets.only(left: 75, right: 20),
                   trailing: Radio<Locale>(
                     value: Locale('zh_Hans'),
                     groupValue: Locale(Intl.getCurrentLocale()),
-                    onChanged: (locale) async {
-                      await S.load(locale);
-                      setState(() {});
-                    }),
-              ),
+                    onChanged: _setLocale,
+                  )),
               Divider(height: 2),
               ListTile(
-                title: Text('LE françAIS'),
-                onTap: () async {
-                  await S.load(Locale('fr'));
-                  setState(() {});
-                },
+                title: Text('Français'),
+                onTap: () => _setLocale(Locale('fr')),
                 contentPadding: const EdgeInsets.only(left: 75, right: 20),
                 trailing: Radio<Locale>(
                     value: Locale('fr'),
                     groupValue: Locale(Intl.getCurrentLocale()),
-                    onChanged: (locale) async {
-                      await S.load(locale);
-                      setState(() {});
-                    }),
+                    onChanged: _setLocale),
               ),
               Divider(height: 2),
               //ListTile(

lib/state/setting_state.dart

@@ -5,6 +5,8 @@ import 'package:connectivity/connectivity.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_downloader/flutter_downloader.dart';
+import 'package:intl/intl.dart';
+import 'package:tsacdop/generated/l10n.dart';
 import 'package:workmanager/workmanager.dart';
 
 import '../local_storage/key_value_storage.dart';
@@ -100,6 +102,7 @@ class SettingState extends ChangeNotifier {
   var autoDownloadStorage = KeyValueStorage(autoDownloadNetworkKey);
   var fastForwardSecondsStorage = KeyValueStorage(fastForwardSecondsKey);
   var rewindSecondsStorage = KeyValueStorage(rewindSecondsKey);
+  var localeStorage = KeyValueStorage(localeKey);
 
   Future initData() async {
     await _getTheme();
@@ -108,6 +111,11 @@ class SettingState extends ChangeNotifier {
     await _getRealDark();
   }
 
+  Locale _locale;
+
+  /// Load locale.
+  Locale get locale => _locale;
+
   /// Spp thememode. default auto.
   ThemeMode _theme;
   ThemeMode get theme => _theme;
@@ -253,6 +261,7 @@ class SettingState extends ChangeNotifier {
   @override
   void addListener(VoidCallback listener) {
     super.addListener(listener);
+    _getLocale();
     _getAutoUpdate();
     _getDownloadUsingData();
     _getSleepTimerData();
@@ -331,6 +340,17 @@ class SettingState extends ChangeNotifier {
         await fastForwardSecondsStorage.getInt(defaultValue: 30);
   }
 
+  Future _getLocale() async {
+    var localeString = await localeStorage.getStringList();
+    if (localeString.isEmpty) {
+      _locale = Locale(Intl.systemLocale);
+    } else {
+      _locale = Locale(localeString.first, localeString[1]);
+    }
+    await S.load(_locale);
+    print(_locale.toString());
+  }
+
   Future _saveAccentSetColor() async {
     await accentStorage
         .saveString(_accentSetColor.toString().substring(10, 16));