Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text(widget.title),
      ),
      body: _buildTodoList(),
      floatingActionButton: new FloatingActionButton(
        onPressed: _pushAddTodoScreen,
        tooltip: 'Increment',
        child: new Icon(Icons.add),
        elevation: 4.0,
      ),
      bottomNavigationBar: BottomAppBar(
        child: new Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Expanded(child: IconButton(icon: Icon(Icons.home)),),
            Expanded(child: IconButton(icon: Icon(Icons.show_chart)),),
            Expanded(child: new Text('')),
            Expanded(child: IconButton(icon: Icon(Icons.tab)),),
            Expanded(child: IconButton(icon: Icon(Icons.settings)),),
          ],
        ),
      ),
      floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
    );
  }