【Flutter】アプリ開発チュートリアル（1日目）

import 'package:bottom_navy_bar/bottom_navy_bar.dart';
import 'package:flutter/material.dart';
import 'package:stylerecord/graph.dart';
import 'package:stylerecord/history.dart';
import 'package:stylerecord/home.dart';
import 'package:stylerecord/setting.dart';
import 'package:stylerecord/record.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget{

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  PageController _pageController = PageController(initialPage: 0);

  @override
  void initState() {
    super.initState();
    _pageController = PageController();
  }

  @override
  void dispose() {
    _pageController.dispose();
    super.dispose();
  }
  int _currentIndex = 0;
  int _counter = 0;
  List<Widget> viewList = [
      Home(),  // page1.dart
      Graph(),
      History(),
      Setting()
      // page2.dart
    ];

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Flutter Demo")),
      body: viewList[_currentIndex],
/*      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('You have pushed the button this many times:'),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),*/
      floatingActionButton: FloatingActionButton(
        onPressed: (){
          Navigator.push(
              context,
              MaterialPageRoute(builder: (context) => Record(),
              )
          );
        },
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
      bottomNavigationBar: BottomNavyBar(
        selectedIndex: _currentIndex,
        showElevation: true,
        itemCornerRadius: 24,
        curve: Curves.easeIn,
        onItemSelected: (index) => setState(() => _currentIndex = index),
        items: <BottomNavyBarItem>[
          BottomNavyBarItem(
            icon: Icon(Icons.home),
            title: Text('ホーム'),
            activeColor: Colors.red,
            textAlign: TextAlign.center,
          ),
          BottomNavyBarItem(
            icon: Icon(Icons.show_chart),
            title: Text('グラフ'),
            activeColor: Colors.purpleAccent,
            textAlign: TextAlign.center,
          ),
          BottomNavyBarItem(
            icon: Icon(Icons.history),
            title: Text(
              '履歴',
            ),
            activeColor: Colors.pink,
            textAlign: TextAlign.center,
          ),
          BottomNavyBarItem(
            icon: Icon(Icons.settings),
            title: Text('設定'),
            activeColor: Colors.blue,
            textAlign: TextAlign.center,
          ),
        ],
      ),
    );
  }
}

import 'package:flutter/material.dart';

// タブで移動するページの作成
class Graph extends StatefulWidget {
  @override
  _GraphState createState() => _GraphState();
}

class _GraphState extends State<Graph> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
          child: Text("Graph")
      ),
    );
  }
}