Flutter Drawer Routes

drawer_routes.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Nav Demo 3',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(),
      onGenerateRoute: (settings) {
        if (settings.name == "/home") {
          return PageRouteBuilder(
            pageBuilder: (_, __, ___) => MyHomePage(),
            transitionsBuilder: (_, anim, __, child) {
              return FadeTransition(opacity: anim, child: child);
            },
          );
        }
        if (settings.name == "/about") {
          return PageRouteBuilder(
            pageBuilder: (_, __, ___) => AboutPage(),
            transitionsBuilder: (_, anim, __, child) {
              return FadeTransition(opacity: anim, child: child);
            },
          );
        }
        if (settings.name == "/contact") {
          return PageRouteBuilder(
            pageBuilder: (_, __, ___) => ContactPage(),
            transitionsBuilder: (_, anim, __, child) {
              return FadeTransition(opacity: anim, child: child);
            },
          );
        }
      },
    );
  }
}

class AboutPage extends StatefulWidget {
  @override
  _AboutPageState createState() => new _AboutPageState();
}

class _AboutPageState extends State<AboutPage> {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('About'),
        backgroundColor: Colors.deepOrangeAccent,
      ),
      drawer: MyDrawer(),
      body: new Center(
        child: new Text("About Page", style: new TextStyle(fontSize: 35.0)),
      ),
    );
  }
}

class ContactPage extends StatefulWidget {
  @override
  _ContactPageState createState() => new _ContactPageState();
}

class _ContactPageState extends State<ContactPage> {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('Contact'),
        backgroundColor: Colors.deepOrangeAccent,
      ),
      drawer: MyDrawer(),
      body: new Center(
        child: new Text("Contact Page", style: new TextStyle(fontSize: 35.0)),
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        appBar: new AppBar(
          title: new Text("Navigation Demo"),
          backgroundColor: Colors.deepOrangeAccent,
        ),
        drawer: MyDrawer(),
        body: new Center(
          child: new Text("Home Page", style: new TextStyle(fontSize: 35.0)),
        ));
  }
}

class MyDrawer extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Drawer(
      child: new ListView(
        children: <Widget>[
          new ListTile(
            title: new Text("WELCOME"),
          ),
          new Divider(),
          new ListTile(
              title: new Text("About"),
              trailing: new Icon(Icons.info),
              onTap: () {
                Navigator.of(context).pop();
                Navigator.of(context).pushReplacementNamed('/about');
              }),
          new ListTile(
              title: new Text("Contact"),
              trailing: new Icon(Icons.phone),
              onTap: () {
                Navigator.of(context).pop();
                Navigator.of(context).pushReplacementNamed('/contact');
              }),
        ],
      ),
    );
  }
}