Open a modal or a dialogue after navigation in Flutter - flutter

Question

After calling Navigator pushReplacement, I arrive at a screen where I'd like to open a modal or a dialog automatically after the screen loads. I'm trying to do that using Timer.run inside initState() but it doesn't work, it doesn't show any errors as well. Could anyone help me understand what am I missing here?
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'dart:async';
class AfterSplash extends StatefulWidget {
#override
_AfterSplashState createState() => _AfterSplashState();
}
class _AfterSplashState extends State<AfterSplash> {
void initState() {
super.initState();
Timer.run(() {
showDialog(
context: context,
builder: (_) => AlertDialog(title: Text("Dialog title")),
);
});
}
#override
Widget build(BuildContext context) {
return opacityLogoTitle();
}
}
Widget opacityLogoTitle() {
return Scaffold(
body: Opacity(
opacity: 0.5,
child: Scaffold(
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Center(
child: Padding(
padding: const EdgeInsets.all(20.0),
child: Container(
child: Image(image: AssetImage('assets/images/main.png')),
),
),
),
Text(
'Sample App',
style: TextStyle(
fontFamily: 'SF Pro Display',
fontSize: 60,
color: Color.fromRGBO(105, 121, 248, 1),
),
),
],
),
),
),
);
}

Answer 1

It's my test code with your code.
It works well.
import 'dart:async';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
#override
void initState() {
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: AfterSplash(),
floatingActionButton: FloatingActionButton(
onPressed: () {},
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
class AfterSplash extends StatefulWidget {
#override
_AfterSplashState createState() => _AfterSplashState();
}
class _AfterSplashState extends State<AfterSplash> {
void initState() {
super.initState();
Timer.run(() {
showDialog(
context: context,
builder: (_) => AlertDialog(title: Text("Dialog title")),
);
});
}
#override
Widget build(BuildContext context) {
return opacityLogoTitle();
}
}
Widget opacityLogoTitle() {
return Scaffold(
body: Opacity(
opacity: 0.5,
child: Scaffold(
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Center(
child: Padding(
padding: const EdgeInsets.all(20.0),
child: Container(child: Text('asdf')),
),
),
Text(
'Sample App',
style: TextStyle(
fontFamily: 'SF Pro Display',
fontSize: 60,
color: Color.fromRGBO(105, 121, 248, 1),
),
),
],
),
),
),
);
}