implemented using_tabs example

using_tabs/lib/main.dart

@@ -0,0 +1,69 @@
+import 'package:flutter/material.dart';
+
+import './FirstTab.dart' as first_tab;
+import './SecondTab.dart' as second_tab;
+import './ThirdTab.dart' as third_tab;
+
+void main() {
+  runApp(new MaterialApp(
+      // Title
+      title: "Using Tabs",
+      // Home
+      home: new MyHome()));
+}
+
+class MyHome extends StatefulWidget {
+  @override
+  MyHomeState createState() => new MyHomeState();
+}
+
+class MyHomeState extends State<MyHome> with SingleTickerProviderStateMixin {
+  TabController controller;
+
+  @override
+  void initState() {
+    super.initState();
+
+    controller = new TabController(length: 3, vsync: this);
+  }
+
+  @override
+  void dispose() {
+    controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return new Scaffold(
+        // Appbar
+        appBar: new AppBar(
+          // Title
+          title: new Text("Using Tabs"),
+          backgroundColor: Colors.blue,
+          bottom: new TabBar(
+            tabs: <Tab>[
+              new Tab(
+                icon: new Icon(Icons.favorite),
+              ),
+              new Tab(
+                icon: new Icon(Icons.adb),
+              ),
+              new Tab(
+                icon: new Icon(Icons.airport_shuttle),
+              ),
+            ],
+            controller: controller,
+          ),
+        ),
+        // Body
+        body: new TabBarView(
+          children: <Widget>[
+            new first_tab.First(),
+            new second_tab.Second(),
+            new third_tab.Third()
+          ],
+          controller: controller,
+        ));
+  }
+}