bottomtabbarbug.dart

import 'package:flutter/material.dart';

void main() {
  runApp(new MaterialApp(home: new TestApplication()));
}

class TestApplication extends StatelessWidget {
  final PageController _pageController = new PageController(initialPage: 1);
  final int _pageIndex = 1;

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: _pageIndex == 0 ? null : new AppBar(
        title: new Text("My cool app"),
      ),
      body: new PageView(
        children: [
          new Container(color: Colors.grey),
          new Container(color: Colors.grey),
          new Container(color: Colors.grey),
          new Container(color: Colors.grey)
        ],
        controller: _pageController,
        physics: new NeverScrollableScrollPhysics(),
      ),
      bottomNavigationBar: new BottomNavigationBar(
        items: [
          new BottomNavigationBarItem(icon: new Icon(Icons.calendar_today), title: new Text("A")),
          new BottomNavigationBarItem(icon: new Icon(Icons.location_city), title: new Text("B")),
          new BottomNavigationBarItem(icon: new Icon(Icons.people_outline), title: new Text("C")),
          // To see "normal" behaviour, comment this line
          new BottomNavigationBarItem(icon: new Icon(Icons.settings), title: new Text("D")),
        ],
        onTap: (_) { },
        currentIndex: _pageIndex,
        fixedColor: Theme.of(context).accentColor,
      ),
    );
  }
}