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| import 'package:flutter/material.dart';
void main() { runApp(new MaterialApp( home: HomePage(), )); }
class HomePage extends StatefulWidget { @override _MyState createState() => _MyState(); }
class _MyState extends State<HomePage> { PageController controller; int _currentSelect = 0; void onSelect(int index) { setState(() { _currentSelect = index; controller.animateToPage(index,duration: Duration(milliseconds: 400),curve: Curves.easeInOut); }); }
@override void initState() { controller = PageController(initialPage: 0, keepPage: true, viewportFraction: 2.0); super.initState(); }
@override void dispose() { super.dispose(); controller.dispose(); }
@override Widget build(BuildContext context) { const _defaultColor = Colors.blue; const _selectColor = Colors.greenAccent; return Scaffold( appBar: AppBar( title: Text("PageViewTitle"), ), bottomNavigationBar: BottomNavigationBar( items: [ BottomNavigationBarItem( icon: Icon( Icons.home, ), title: Text( 'Home', )), BottomNavigationBarItem( icon: Icon( Icons.wb_cloudy, ), title: Text( 'Cloudy', )), BottomNavigationBarItem( icon: Icon( Icons.wb_sunny, ), title: Text( 'Sunny', )), BottomNavigationBarItem( icon: Icon( Icons.person, ), title: Text( 'Mine', )) ], unselectedItemColor: _defaultColor, selectedItemColor: _selectColor, currentIndex: _currentSelect, onTap: (index) => onSelect(index), type: BottomNavigationBarType.fixed, ), body: Container( alignment: Alignment.center, child: PageView( children: [ PageItem("Page1", Colors.blueAccent), PageItem("Page2", Colors.tealAccent), PageItem("Page3", Colors.greenAccent), PageItem("Page4", Colors.amberAccent), ], controller: controller, onPageChanged: (value) { onSelect(value); print(value); }, ), ), ); } }
class PageItem extends StatelessWidget { final String title; final Color color;
PageItem(this.title, this.color);
@override Widget build(BuildContext context) { return Container( padding: EdgeInsets.all(10), color: color, child: Center( child: Text(title), ), ); } }
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