Simple navigation menu

lib/main.dart

@@ -1,5 +1,10 @@
+import 'dart:math';
+
 import 'package:flutter/material.dart';
 
+import 'page/actions_page.dart';
+import 'page/repos_page.dart';
+
 void main() {
   runApp(const MyApp());
 }
@@ -7,109 +12,51 @@ void main() {
 class MyApp extends StatelessWidget {
   const MyApp({Key? key}) : super(key: key);
 
-  // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
+      home: HomeScreen(),
-      theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // Try running your application with "flutter run". You'll see the
-        // application has a blue toolbar. Then, without quitting the app, try
-        // changing the primarySwatch below to Colors.green and then invoke
-        // "hot reload" (press "r" in the console where you ran "flutter run",
-        // or simply save your changes to "hot reload" in a Flutter IDE).
-        // Notice that the counter didn't reset back to zero; the application
-        // is not restarted.
-        primarySwatch: Colors.blue,
-      ),
-      home: const MyHomePage(title: 'Flutter Demo Home Page'),
     );
   }
 }
 
-class MyHomePage extends StatefulWidget {
+class HomeScreen extends StatefulWidget {
-  const MyHomePage({Key? key, required this.title}) : super(key: key);
+  const HomeScreen({
-
+    Key? key,
-  // This widget is the home page of your application. It is stateful, meaning
+  }) : super(key: key);
-  // that it has a State object (defined below) that contains fields that affect
-  // how it looks.
-
-  // This class is the configuration for the state. It holds the values (in this
-  // case the title) provided by the parent (in this case the App widget) and
-  // used by the build method of the State. Fields in a Widget subclass are
-  // always marked "final".
-
-  final String title;
 
   @override
-  State<MyHomePage> createState() => _MyHomePageState();
+  State<HomeScreen> createState() => _HomeScreenState();
 }
 
-class _MyHomePageState extends State<MyHomePage> {
+class _HomeScreenState extends State<HomeScreen> {
-  int _counter = 0;
+  int _index = 0;
 
-  void _incrementCounter() {
+  final screens = [
-    setState(() {
+    ReposPage(),
-      // This call to setState tells the Flutter framework that something has
+    ActionPage(),
-      // changed in this State, which causes it to rerun the build method below
+  ];
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
-    });
-  }
 
   @override
   Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
     return Scaffold(
-      appBar: AppBar(
+      body: screens[_index],
-        // Here we take the value from the MyHomePage object that was created by
+      bottomNavigationBar: NavigationBarTheme(
-        // the App.build method, and use it to set our appbar title.
+        data: NavigationBarThemeData(
-        title: Text(widget.title),
+            labelTextStyle: MaterialStateProperty.all(
+              const TextStyle(fontSize: 14, fontWeight: FontWeight.w500),
             ),
-      body: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        child: Column(
-          // Column is also a layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Invoke "debug painting" (press "p" in the console, choose the
-          // "Toggle Debug Paint" action from the Flutter Inspector in Android
-          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
-          // to see the wireframe for each widget.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            const Text(
-              'You have pushed the button this many times:',
-            ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headline4,
         ),
+        child: NavigationBar(
+          height: 70,
+          selectedIndex: _index,
+          onDestinationSelected: (index) => setState(() => this._index = index),
+          destinations: const [
+            NavigationDestination(icon: Icon(Icons.home_outlined), selectedIcon: Icon(Icons.home), label: 'Repos'),
+            NavigationDestination(icon: Icon(Icons.add_outlined), selectedIcon: Icon(Icons.add), label: 'Actions')
           ],
         ),
       ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: const Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
     );
   }
 }

lib/page/actions_page.dart

@@ -0,0 +1,13 @@
+import 'package:flutter/material.dart';
+
+
+class ActionPage extends StatelessWidget {
+  const ActionPage({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Text('B'),
+    );
+  }
+}

lib/page/repos_page.dart

@@ -0,0 +1,13 @@
+import 'package:flutter/material.dart';
+
+
+class ReposPage extends StatelessWidget {
+  const ReposPage({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Text('A'),
+    );
+  }
+}

test/widget_test.dart

@@ -11,20 +11,20 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:simple_git/main.dart';
 
 void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
+  testWidgets('Simple navigation test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
     await tester.pumpWidget(const MyApp());
 
     // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
+    expect(find.text('A'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
+    expect(find.text('B'), findsNothing);
 
     // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
+    await tester.tap(find.byIcon(Icons.add_outlined));
     await tester.pump();
 
     // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
+    expect(find.text('A'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
+    expect(find.text('B'), findsOneWidget);
   });
 }