Выпадающее меню с тремя кнопками

lib/base_state.dart

@@ -1,5 +1,3 @@
-import 'dart:async';
-
 import 'package:checker/resources.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -7,10 +5,12 @@ import 'package:intl/intl.dart';
 
 import 'common.dart';
 import 'consts.dart';
-import 'strings.dart';
+import 'package:checker/db.dart';
 
 abstract class BaseState<T extends StatefulWidget> extends State<T> {
 
+  SqliteHelper helper;
+
   /// Тип сборки. Определяет, какие брать ресурсы (цвета, картинки)
   String app;
 
@@ -31,7 +31,10 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
         platform.invokeMethod('getFlavor').then((flavor) {
           setState(() {
             app = flavor;
-            onStart();
+            helper = new SqliteHelper();
+            helper.open().then((_){
+              onStart();
+            });
           });
         });
       }
@@ -57,7 +60,7 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
   }
 
   void onStart() {
-
+    print("ON START!");
   }
 
   /// Возвращает контейнер с всеми виджетами экрана.
@@ -72,7 +75,22 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
   }
 
   List<Widget> getMenuButtons() {
-    return <Widget>[getFaqButton()];
+    return <Widget>[
+      new PopupMenuButton(
+          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),
+                      ]))
+            ];
+          }
+      )];
   }
 
   Widget getFaqButton() {