Работает функционал переключения валют, остались правки по ui

lib/screens/languages.dart

@@ -2,6 +2,7 @@ import 'package:checker/base/settings_base_state.dart';
 import 'package:flutter/material.dart';
 import 'package:checker/consts.dart';
 import 'package:checker/strings.dart';
+import 'package:checker/common.dart';
 
 class LanguagesScreen extends StatefulWidget {
   @override State createState() => new _LanguagesState();
@@ -18,4 +19,19 @@ class _LanguagesState extends SettingsBaseState<LanguagesScreen> {
   String getTitle() {
     return StringsLocalization.locale();
   }
+
+  @override
+  void saveOption() {
+//    helper.sa(languages[selectedItem]);
+  }
+
+  @override
+  void getSelectedValue() {
+    helper.getLocale().then((locale) {
+      setState(() {
+        print(selectedItem);
+        selectedItem = getOptions().indexOf(getLocaleTitle(locale));
+      });
+    });
+  }
 }