How to change AppBar Title (between Image asset and Text) in flutter? - flutter

Question

I want to set Title appbar with image assets in HomePage, and with text in ListPage. and I have try with this code
import 'package:flutter/material.dart';
import 'package:teld/page/homepage/homePage.dart';
import 'package:teld/page/listpage/listPage.dart';
import 'package:teld/page/settingPage.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(fontFamily: 'Roboto'),
home: NavStructure(),
);
}
}
class NavStructure extends StatefulWidget {
#override
_NavStructureState createState() => _NavStructureState();
}
class _NavStructureState extends State<NavStructure>{
final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
int _currentIndex = 0;
var _title;
final _page = [
HomePage(),
ListPage(),
SettingPage(),
];
void onTapBar(int index) {
setState(() {
_currentIndex = index;
switch(index){
case 0:{
_title = Image.asset('assets/TDLogoNB.png', height: 38.0,);
}break;
case 1:{
_title = Text("List Page");
}break;
case 2:{
_title = Text("Setting Page");
}break;
}
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
key: _scaffoldKey,
appBar: AppBar(
elevation: 0,
centerTitle: true,
backgroundColor: Colors.white,
title: _title //this
),
body: _page[_currentIndex],
bottomNavigationBar: BottomNavigationBar(
onTap: onTapBar,
currentIndex: _currentIndex,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.home),
title: Text('Home'),
),
BottomNavigationBarItem(
icon: Icon(Icons.list_view),
title: Text('List Page'),
),
BottomNavigationBarItem(
icon: Icon(Icons.settings),
title: Text('Setting Page'),
),
],
),
);
}
}
what I'm trying to do is
appbar title with image asset in HomePage
appbar title with text in ListPage/other page
from my code.
appbar title (as Text) in ListPage did not appear at all.
"Image asset" in HomePage didn't appear either, until the time I opened it for the second time, the "image asset" just appeared
how to solve this?

Answer 1

Maybe you can try this
AppBar(
title: 0 == _currentIndex ? Image.asset("/assets/....") : Text("..."),
// ....
),
In this case _title will not be necessary and you can omit it