flutter bottom navigation bar center button
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,
);
}