В бд добавлена таблица настроек, данные для настроек берутся из базы

lib/base_state.dart

@@ -3,8 +3,11 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:intl/intl.dart';
 
-import 'common.dart';
-import 'consts.dart';
+import 'package:checker/common.dart';
+import 'package:checker/consts.dart';
+import 'package:checker/screens/settings.dart';
+import 'package:checker/screens/faq.dart';
+import 'package:checker/strings.dart';
 import 'package:checker/db.dart';
 
 abstract class BaseState<T extends StatefulWidget> extends State<T> {
@@ -21,24 +24,23 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
   String error;
 
   /// Введенное пользователем значение.
-  String textFieldValue = '';
+  String dinCode = '';
 
   @override Widget build(BuildContext ctx) {
 
-    platform.invokeMethod('getLocale').then((locale) {
-      Intl.defaultLocale = locale;
-      if (app == null) {
-        platform.invokeMethod('getFlavor').then((flavor) {
-          setState(() {
+    if (helper == null) {
+      helper = new SqliteHelper();
+      helper.open().then((_) {
+        if (app == null) {
+          platform.invokeMethod('getFlavor').then((flavor) {
             app = flavor;
-            helper = new SqliteHelper();
-            helper.open().then((_){
+            setState(() {
               onStart();
             });
           });
-        });
-      }
-    });
+        }
+      });
+    }
 
     return getMainWidget();
   }
@@ -67,7 +69,9 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
   Widget getScreenContent();
 
   /// Возвращает заголовок для AppBar
-  String getTitle();
+  String getTitle() {
+    return null;
+  }
 
   AppBar getAppBar() {
     return new AppBar(title: new Text(getTitle(), style: new TextStyle(fontSize: 18.0)),
@@ -76,29 +80,44 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
 
   List<Widget> getMenuButtons() {
     return <Widget>[
-      new PopupMenuButton(
+      new PopupMenuButton<int>(
+          onSelected: onOptionsItemClick,
           itemBuilder: (BuildContext context) {
-            [
-              new PopupMenuItem(
-                  child: new Row(
-                      crossAxisAlignment: CrossAxisAlignment.start,
-                      children: [
-                        new Image.asset(
-                            settings_png, width: 48.0, height: 48.0),
-                        new Image.asset(help_png, width: 48.0, height: 48.0),
-                        new Image.asset(logout_png, width: 48.0, height: 48.0),
-                      ]))
+            return [new PopupMenuItem(
+                value: 0,
+                child: getMenuItem(settings_png, StringsLocalization.settings())),
+            new PopupMenuItem(
+                value: 1,
+                child: getMenuItem(help_png, StringsLocalization.help())),
+            new PopupMenuItem(
+                value: 2,
+                child: getMenuItem(logout_png, StringsLocalization.logout()))
             ];
           }
       )];
   }
 
-  Widget getFaqButton() {
-    return new IconButton(icon: new Icon(Icons.help_outline), onPressed: () => faq(context, false));
+  void onOptionsItemClick(int index) {
+    switch (index) {
+      case 0: {
+        pushRoute(context, new SettingsScreen());
+        break;
+      }
+      case 1: {
+        pushRoute(context, new FAQScreen(false));
+        break;
+      }
+      case 0: {
+        logout(context);
+      }
+    }
   }
 
-  Widget getLogoutButton() {
-    return new IconButton(icon: new Image.asset(logout_png, height: iconHeight, width: iconHeight), onPressed: () => logout(context));
+  Widget getMenuItem(String image, String text) {
+    return new Row(children: [
+      new Image.asset(image, width: 28.0, height: 28.0),
+      new Container(padding: new EdgeInsets.only(left: 8.0), child: new Text(text))
+    ]);
   }
 
   /// Возврвщает контейнер, внутри которого Text с подсказкой.
@@ -112,7 +131,7 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
 
   /// Возвращает подсказку, либо ошибку, если введенные в поле ввода данные неверны.
   String getHintString() {
-    if (textFieldValue.length == 0 && error == null) {
+    if (dinCode.length == 0 && error == null) {
       return ' ';
     } else if (error != null) {
       return error;
@@ -130,7 +149,7 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
   /// Смена состояния экрана при изменении текста в поле ввода.
   void handleUserInput(String text) {
     setState(() {
-      textFieldValue = text;
+      dinCode = text;
     });
   }