feat: add bottom navigation shell with study/manage/stats/account tabs
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pluv committed
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+247
-125
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@@ -0,0 +1,63 @@
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import 'package:flutter/material.dart';
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import 'pages/account_page.dart';
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import 'pages/manage_page.dart';
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import 'pages/stats_page.dart';
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import 'pages/study_page.dart';
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/// 应用外壳：底部四个主入口。
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///
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/// 用 [IndexedStack] 而不是直接切换 widget，是为了在切页时保留各页面的
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/// 状态（滚动位置、输入内容、进行中的学习会话）。
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class AppShell extends StatefulWidget {
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const AppShell({super.key});
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@override
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State<AppShell> createState() => _AppShellState();
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}
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class _AppShellState extends State<AppShell> {
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int _selectedIndex = 0;
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static const List<Widget> _pages = <Widget>[
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StudyPage(),
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ManagePage(),
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StatsPage(),
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AccountPage(),
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];
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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body: IndexedStack(index: _selectedIndex, children: _pages),
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bottomNavigationBar: NavigationBar(
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selectedIndex: _selectedIndex,
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onDestinationSelected: (int index) {
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setState(() => _selectedIndex = index);
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},
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destinations: const <NavigationDestination>[
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NavigationDestination(
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icon: Icon(Icons.school_outlined),
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selectedIcon: Icon(Icons.school),
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label: '学习',
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),
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NavigationDestination(
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icon: Icon(Icons.library_books_outlined),
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selectedIcon: Icon(Icons.library_books),
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label: '管理',
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),
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NavigationDestination(
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icon: Icon(Icons.insights_outlined),
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selectedIcon: Icon(Icons.insights),
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label: '统计',
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),
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NavigationDestination(
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icon: Icon(Icons.person_outline),
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selectedIcon: Icon(Icons.person),
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label: '账户',
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),
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],
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),
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);
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}
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}
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+20
-106
@@ -1,121 +1,35 @@
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import 'package:flutter/material.dart';
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import 'app_shell.dart';
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/// Dart 层的应用名。各平台原生的应用名（窗口标题、桌面图标）由各自的配置
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/// 文件提供：android 的 `app_name` 字符串资源、ios 的 `CFBundleDisplayName`、
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/// linux/windows 的 `APPLICATION_TITLE`，文本与这里保持一致。
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const String appName = 'KiriMemo';
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void main() {
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runApp(const MyApp());
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runApp(const KiriMemoApp());
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}
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class MyApp extends StatelessWidget {
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const MyApp({super.key});
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class KiriMemoApp extends StatelessWidget {
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const KiriMemoApp({super.key});
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// This widget is the root of your application.
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'Flutter Demo',
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theme: ThemeData(
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// This is the theme of your application.
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//
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// TRY THIS: Try running your application with "flutter run". You'll see
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// the application has a purple toolbar. Then, without quitting the app,
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// try changing the seedColor in the colorScheme below to Colors.green
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// and then invoke "hot reload" (save your changes or press the "hot
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// reload" button in a Flutter-supported IDE, or press "r" if you used
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// the command line to start the app).
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//
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// Notice that the counter didn't reset back to zero; the application
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// state is not lost during the reload. To reset the state, use hot
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// restart instead.
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//
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// This works for code too, not just values: Most code changes can be
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// tested with just a hot reload.
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colorScheme: .fromSeed(seedColor: Colors.deepPurple),
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),
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home: const MyHomePage(title: 'Flutter Demo Home Page'),
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title: appName,
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debugShowCheckedModeBanner: false,
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theme: _theme(Brightness.light),
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darkTheme: _theme(Brightness.dark),
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home: const AppShell(),
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);
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}
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}
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class MyHomePage extends StatefulWidget {
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const MyHomePage({super.key, required this.title});
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// This widget is the home page of your application. It is stateful, meaning
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// that it has a State object (defined below) that contains fields that affect
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// how it looks.
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// This class is the configuration for the state. It holds the values (in this
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// case the title) provided by the parent (in this case the App widget) and
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// used by the build method of the State. Fields in a Widget subclass are
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// always marked "final".
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final String title;
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@override
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State<MyHomePage> createState() => _MyHomePageState();
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}
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class _MyHomePageState extends State<MyHomePage> {
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int _counter = 0;
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void _incrementCounter() {
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setState(() {
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// This call to setState tells the Flutter framework that something has
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// changed in this State, which causes it to rerun the build method below
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// so that the display can reflect the updated values. If we changed
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// _counter without calling setState(), then the build method would not be
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// called again, and so nothing would appear to happen.
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_counter++;
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});
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}
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@override
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Widget build(BuildContext context) {
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// This method is rerun every time setState is called, for instance as done
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// by the _incrementCounter method above.
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//
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// The Flutter framework has been optimized to make rerunning build methods
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// fast, so that you can just rebuild anything that needs updating rather
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// than having to individually change instances of widgets.
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return Scaffold(
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appBar: AppBar(
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// TRY THIS: Try changing the color here to a specific color (to
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// Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
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// change color while the other colors stay the same.
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backgroundColor: Theme.of(context).colorScheme.inversePrimary,
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// Here we take the value from the MyHomePage object that was created by
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// the App.build method, and use it to set our appbar title.
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title: Text(widget.title),
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),
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body: Center(
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// Center is a layout widget. It takes a single child and positions it
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// in the middle of the parent.
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child: Column(
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// Column is also a layout widget. It takes a list of children and
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// arranges them vertically. By default, it sizes itself to fit its
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// children horizontally, and tries to be as tall as its parent.
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//
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// Column has various properties to control how it sizes itself and
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// how it positions its children. Here we use mainAxisAlignment to
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// center the children vertically; the main axis here is the vertical
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// axis because Columns are vertical (the cross axis would be
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// horizontal).
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//
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// TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
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// action in the IDE, or press "p" in the console), to see the
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// wireframe for each widget.
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mainAxisAlignment: .center,
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children: [
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const Text('You have pushed the button this many times:'),
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Text(
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'$_counter',
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style: Theme.of(context).textTheme.headlineMedium,
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),
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],
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),
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),
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floatingActionButton: FloatingActionButton(
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onPressed: _incrementCounter,
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tooltip: 'Increment',
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child: const Icon(Icons.add),
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static ThemeData _theme(Brightness brightness) {
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return ThemeData(
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colorScheme: ColorScheme.fromSeed(
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seedColor: const Color(0xFF4C6EF5),
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brightness: brightness,
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),
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);
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}
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@@ -0,0 +1,20 @@
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import 'package:flutter/material.dart';
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import '../widgets/empty_state.dart';
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/// 账户：登录、同步与偏好设置。
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class AccountPage extends StatelessWidget {
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const AccountPage({super.key});
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(title: const Text('账户')),
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body: const EmptyState(
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icon: Icons.person_outline,
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title: '账户与同步',
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message: '登录后可以在多台设备之间同步学习记录。',
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),
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);
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}
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}
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@@ -0,0 +1,20 @@
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import 'package:flutter/material.dart';
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import '../widgets/empty_state.dart';
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/// 管理：牌组与卡片的增删改查。
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class ManagePage extends StatelessWidget {
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const ManagePage({super.key});
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(title: const Text('管理')),
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body: const EmptyState(
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icon: Icons.library_books_outlined,
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title: '管理卡片与牌组',
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message: '在这里添加、编辑和整理你的学习材料。',
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),
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);
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}
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}
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@@ -0,0 +1,20 @@
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import 'package:flutter/material.dart';
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import '../widgets/empty_state.dart';
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/// 统计：学习进度、记忆保持率与每日复习量。
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class StatsPage extends StatelessWidget {
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const StatsPage({super.key});
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(title: const Text('统计')),
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body: const EmptyState(
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icon: Icons.insights_outlined,
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title: '复习数据统计',
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message: '学习进度、记忆保持率和每日复习量会显示在这里。',
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),
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);
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}
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}
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@@ -0,0 +1,20 @@
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import 'package:flutter/material.dart';
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import '../widgets/empty_state.dart';
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/// 学习：今天到期的卡片与复习会话入口。
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class StudyPage extends StatelessWidget {
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const StudyPage({super.key});
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(title: const Text('学习')),
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body: const EmptyState(
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icon: Icons.school_outlined,
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title: '开始今天的复习',
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message: '待学习的卡片和到期需要复习的卡片会出现在这里。',
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),
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);
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}
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}
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@@ -0,0 +1,51 @@
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import 'package:flutter/material.dart';
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/// 各主页面共用的占位内容：一个图标、一句标题和可选说明。
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///
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/// 页面接上真实业务后可以直接替换掉。
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class EmptyState extends StatelessWidget {
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const EmptyState({
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required this.icon,
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required this.title,
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this.message,
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super.key,
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});
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final IconData icon;
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final String title;
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final String? message;
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@override
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Widget build(BuildContext context) {
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final ThemeData theme = Theme.of(context);
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final String? message = this.message;
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return Center(
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child: Padding(
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padding: const EdgeInsets.symmetric(horizontal: 32),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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Icon(icon, size: 56, color: theme.colorScheme.primary),
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const SizedBox(height: 16),
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Text(
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title,
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style: theme.textTheme.titleMedium,
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textAlign: TextAlign.center,
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),
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if (message != null) ...<Widget>[
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const SizedBox(height: 8),
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Text(
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message,
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style: theme.textTheme.bodyMedium?.copyWith(
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color: theme.colorScheme.onSurfaceVariant,
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),
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textAlign: TextAlign.center,
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),
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],
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],
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),
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),
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);
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}
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}
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+33
-19
@@ -1,30 +1,44 @@
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// This is a basic Flutter widget test.
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//
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// To perform an interaction with a widget in your test, use the WidgetTester
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// utility in the flutter_test package. For example, you can send tap and scroll
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// gestures. You can also use WidgetTester to find child widgets in the widget
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// tree, read text, and verify that the values of widget properties are correct.
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:mobile/main.dart';
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/// 在导航栏内按标签定位，避免和页面标题的相同文字混淆。
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Finder navLabel(String label) {
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return find.descendant(
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of: find.byType(NavigationBar),
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matching: find.text(label),
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);
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}
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void main() {
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testWidgets('Counter increments smoke test', (WidgetTester tester) async {
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// Build our app and trigger a frame.
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await tester.pumpWidget(const MyApp());
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testWidgets('底部导航提供学习 / 管理 / 统计 / 账户四个入口', (WidgetTester tester) async {
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await tester.pumpWidget(const KiriMemoApp());
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// Verify that our counter starts at 0.
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expect(find.text('0'), findsOneWidget);
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expect(find.text('1'), findsNothing);
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expect(find.byType(NavigationBar), findsOneWidget);
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expect(find.byType(NavigationDestination), findsNWidgets(4));
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// Tap the '+' icon and trigger a frame.
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await tester.tap(find.byIcon(Icons.add));
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await tester.pump();
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for (final String label in <String>['学习', '管理', '统计', '账户']) {
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expect(navLabel(label), findsOneWidget);
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}
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});
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// Verify that our counter has incremented.
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expect(find.text('0'), findsNothing);
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expect(find.text('1'), findsOneWidget);
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testWidgets('默认停留在学习页，点击其它入口会切换', (WidgetTester tester) async {
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await tester.pumpWidget(const KiriMemoApp());
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NavigationBar bar = tester.widget<NavigationBar>(find.byType(NavigationBar));
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expect(bar.selectedIndex, 0);
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await tester.tap(navLabel('统计'));
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await tester.pumpAndSettle();
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bar = tester.widget<NavigationBar>(find.byType(NavigationBar));
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expect(bar.selectedIndex, 2);
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await tester.tap(navLabel('账户'));
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await tester.pumpAndSettle();
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bar = tester.widget<NavigationBar>(find.byType(NavigationBar));
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expect(bar.selectedIndex, 3);
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});
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}
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