Added language setting (mostly working) - #165

assets/translations/de.json

@@ -208,6 +208,7 @@
     "categoryDeleteWarning": "All Apps in deleted categories will be set to uncategorized.",
     "addCategory": "Add Category",
     "label": "Label",
+    "language": "Language",
     "tooManyRequestsTryAgainInMinutes": {
         "one": "Zu viele Anfragen (Rate begrenzt) - versuchen Sie es in {} Minute erneut",
         "other": "Zu viele Anfragen (Rate begrenzt) - versuchen Sie es in {} Minuten erneut"

assets/translations/en.json

@@ -208,6 +208,7 @@
     "categoryDeleteWarning": "All Apps in deleted categories will be set to uncategorized.",
     "addCategory": "Add Category",
     "label": "Label",
+    "language": "Language",
     "tooManyRequestsTryAgainInMinutes": {
         "one": "Too many requests (rate limited) - try again in {} minute",
         "other": "Too many requests (rate limited) - try again in {} minutes"

assets/translations/hu.json

@@ -208,6 +208,7 @@
     "categoryDeleteWarning": "All Apps in deleted categories will be set to uncategorized.",
     "addCategory": "Add Category",
     "label": "Label",
+    "language": "Language",
     "tooManyRequestsTryAgainInMinutes": {
         "one": "Túl sok kérés (korlátozott arány) – próbálja újra {} perc múlva",
         "other": "Túl sok kérés (korlátozott arány) – próbálja újra {} perc múlva"

assets/translations/it.json

@@ -208,6 +208,7 @@
     "categoryDeleteWarning": "All Apps in deleted categories will be set to uncategorized.",
     "addCategory": "Add Category",
     "label": "Label",
+    "language": "Language",
     "tooManyRequestsTryAgainInMinutes": {
         "one": "Troppe richieste (traffico limitato) - riprova tra {} minuto",
         "other": "Troppe richieste (traffico limitato) - riprova tra {} minuti"

assets/translations/ja.json

@@ -208,6 +208,7 @@
     "categoryDeleteWarning": "All Apps in deleted categories will be set to uncategorized.",
     "addCategory": "カテゴリを追加",
     "label": "ラベル",
+    "language": "Language",
     "tooManyRequestsTryAgainInMinutes": {
         "one": "リクエストが多すぎます（レート制限）- {}分後に再試行してください",
         "other": "リクエストが多すぎます（レート制限）- {}分後に再試行してください"

assets/translations/zh.json

@@ -208,6 +208,7 @@
     "categoryDeleteWarning": "All Apps in deleted categories will be set to uncategorized.",
     "addCategory": "Add Category",
     "label": "Label",
+    "language": "Language",
     "tooManyRequestsTryAgainInMinutes": {
         "one": "请求过多 (API 限制) - 在 {} 分钟后重试",
         "other": "请求过多 (API 限制) - 在 {} 分钟后重试"

lib/pages/settings.dart

@@ -6,6 +6,7 @@ import 'package:obtainium/components/custom_app_bar.dart';
 import 'package:obtainium/components/generated_form.dart';
 import 'package:obtainium/components/generated_form_modal.dart';
 import 'package:obtainium/custom_errors.dart';
+import 'package:obtainium/main.dart';
 import 'package:obtainium/providers/apps_provider.dart';
 import 'package:obtainium/providers/logs_provider.dart';
 import 'package:obtainium/providers/settings_provider.dart';
@@ -129,6 +130,25 @@ class _SettingsPageState extends State<SettingsPage> {
           }
         });
 
+    var localeDropdown = DropdownButtonFormField(
+        decoration: InputDecoration(labelText: tr('language')),
+        value: settingsProvider.forcedLocale,
+        items: [
+          DropdownMenuItem(
+            value: null,
+            child: Text(tr('followSystem')),
+          ),
+          ...supportedLocales.map((e) => DropdownMenuItem(
+                value: e.toLanguageTag(),
+                child: Text(e.toLanguageTag().toUpperCase()),
+              ))
+        ],
+        onChanged: (value) {
+          settingsProvider.forcedLocale = value;
+          context.setLocale(Locale(settingsProvider.forcedLocale ??
+              context.fallbackLocale!.languageCode));
+        });
+
     var intervalDropdown = DropdownButtonFormField(
         decoration: InputDecoration(labelText: tr('bgUpdateCheckInterval')),
         value: settingsProvider.updateInterval,
@@ -210,6 +230,8 @@ class _SettingsPageState extends State<SettingsPage> {
                               ],
                             ),
                             height16,
+                            localeDropdown,
+                            height16,
                             Row(
                               mainAxisAlignment: MainAxisAlignment.spaceBetween,
                               children: [

lib/providers/settings_provider.dart

@@ -7,6 +7,7 @@ import 'package:flutter/material.dart';
 import 'package:fluttertoast/fluttertoast.dart';
 import 'package:obtainium/app_sources/github.dart';
 import 'package:obtainium/components/generated_form.dart';
+import 'package:obtainium/main.dart';
 import 'package:permission_handler/permission_handler.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
@@ -164,4 +165,24 @@ class SettingsProvider with ChangeNotifier {
         ...categories.entries.map((e) => MapEntry(e.key, e.key)).toList()
       ],
       defaultValue: initCategory);
+
+  String? get forcedLocale {
+    var fl = prefs?.getString('forcedLocale');
+    return supportedLocales
+            .where((element) => element.toLanguageTag() == fl)
+            .isNotEmpty
+        ? fl
+        : null;
+  }
+
+  set forcedLocale(String? fl) {
+    if (fl == null) {
+      prefs?.remove('forcedLocale');
+    } else if (supportedLocales
+        .where((element) => element.toLanguageTag() == fl)
+        .isNotEmpty) {
+      prefs?.setString('forcedLocale', fl);
+    }
+    notifyListeners();
+  }
 }