The method 'updateRenderer' was called on null. Receiver: null Tried calling: updateRenderer(false)
Everytime I scroll between the widgets, I get this error.
Code:
`import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_multi_carousel/carousel.dart';
import 'package:flutter_story_app_concept/cardPage.dart';
class MyPage extends StatefulWidget {
@override
_MyPageState createState() => _MyPageState();
}
class _MyPageState extends State {
int initial = 2;
@override
Widget build(BuildContext context) {
return Container(
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [
Color(0xFF1b1e44),
Color(0xff1b1e44),
],
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
tileMode: TileMode.clamp)),
child: Scaffold(
appBar: CupertinoNavigationBar(
middle: Text("My Cards", style: TextStyle(color: Colors.white),),
backgroundColor: Colors.transparent,
),
backgroundColor: Colors.transparent,
body: SingleChildScrollView(
child: Column(
children: [
SizedBox(height: 20,),
SingleChildScrollView(
scrollDirection: Axis.horizontal,
padding: EdgeInsets.only(left: 20, right: 20),
child: Row(
children: [
Center(
child: Hero(
tag: 'dash',
child: ClipRRect(
borderRadius: BorderRadius.circular(20.0),
child: Image.asset("assets/image_02.jpg",
width: 296.0, height: 222.0),
),
),
),
SizedBox(width: 20,),
Center(
child: ClipRRect(
borderRadius: BorderRadius.circular(20.0),
child: Container(
padding: EdgeInsets.only(left: 20, top: 20),
width: 296.0, height: 222.0,
color: Colors.white,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Random Analytics",
style: TextStyle(color: Colors.black, fontSize: 24, fontWeight: FontWeight.w500),),
Text("Bla Bla Bla"),
Text("\nGRAPH",style: TextStyle(fontWeight: FontWeight.bold, fontSize: 26),),
Text("\nMore Text")
],
),
alignment: Alignment.centerLeft,
)
),
),
SizedBox(width: 20,),
Center(
child: ClipRRect(
borderRadius: BorderRadius.circular(20.0),
child: Container(
padding: EdgeInsets.all(20),
width: 296.0, height: 222.0,
decoration: BoxDecoration(
color: Colors.transparent,
border: Border.all(
color: Colors.red
),
borderRadius: BorderRadius.circular(20)
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text("More Analytics",
style: TextStyle(color: Colors.white, fontSize: 24, fontWeight: FontWeight.w500),),
Text("Bla Bla Bla", style: TextStyle(color: Colors.white),),
Container(
decoration: BoxDecoration(borderRadius: BorderRadius.circular(30), color: Colors.green),
height: 60,
width: 60,
),
Text("More Text",style: TextStyle(fontWeight: FontWeight.bold, fontSize: 20, color: Colors.white))
],
),
alignment: Alignment.center,
)
),
),
],
),
),
SizedBox(height: 30,),
Container(
child: Carousel(
showIndicator: true,
indicatorType: IndicatorTypes.dot,
indicatorBackgroundOpacity: 0,
allowWrap: false,
height: MediaQuery.of(context).size.height*.58,
width: MediaQuery.of(context).size.width*95,
initialPage: initial,
type: Types.slideSwiper,
axis: Axis.horizontal,
children: [
GestureDetector(
onTap: () {
Navigator.push(
context,
CupertinoPageRoute(builder: (BuildContext context) => CardPage(
start: Colors.deepOrange[900],
end: Colors.yellow[400],
tag: 'num1',
name: 'Nithin Sai',
bank: 'Vijaya Bank',
numb: '4432 5677 9812 0120',
date: '02/23',
),
fullscreenDialog: true
),
);
setState(() {
initial = 0;
});
},
child: Hero(
tag: 'num1',
child: Container(
padding: EdgeInsets.all(20),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(15),
gradient: LinearGradient(
colors: [
Colors.deepOrange[900],Colors.yellow[400],
],
begin: Alignment.topLeft,
end: Alignment.bottomRight
)
),
alignment: Alignment.topLeft,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Nithin Sai",
style: TextStyle(fontSize: 40,color: Colors.white, fontWeight: FontWeight.bold,
decoration: TextDecoration.none
),
),
Text("\nVijaya Bank",
style: TextStyle(fontSize: 30,color: Colors.grey[400], fontWeight: FontWeight.bold,
decoration: TextDecoration.none
),
),
],
),
),
flightShuttleBuilder: (
BuildContext flightContext,
Animation animation,
HeroFlightDirection flightDirection,
BuildContext fromHeroContext,
BuildContext toHeroContext,
) {
final Hero toHero = toHeroContext.widget;
return RotationTransition(
turns: animation,
child: toHero.child,
);
},
),
),
GestureDetector(
onTap: () {
Navigator.push(
context,
CupertinoPageRoute(builder: (BuildContext context) => CardPage(
start: Color(0xffe633e6),
end: Color(0xff0000aa),
tag: 'num2',
name: 'Kashware',
bank: 'ICICI Bank',
numb: '4432 5209 9812 2314',
date: '12/43',
),
fullscreenDialog: true
),
);
setState(() {
initial = 1;
});
},
child: Hero(
tag: 'num2',
child: Container(
padding: EdgeInsets.all(20),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(15),
gradient: LinearGradient(
colors: [
Color(0xffe633e6), Color(0xff0000aa)
],
begin: Alignment.topLeft,
end: Alignment.bottomRight
)
),
alignment: Alignment.topLeft,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Kashware",
style: TextStyle(fontSize: 40,color: Colors.white, fontWeight: FontWeight.bold,
decoration: TextDecoration.none
),
),
Text("\nICICI Bank",
style: TextStyle(fontSize: 30,color: Colors.grey[400], fontWeight: FontWeight.bold,
decoration: TextDecoration.none
),
),
],
),
),
flightShuttleBuilder: (
BuildContext flightContext,
Animation animation,
HeroFlightDirection flightDirection,
BuildContext fromHeroContext,
BuildContext toHeroContext,
) {
final Hero toHero = toHeroContext.widget;
return RotationTransition(
turns: animation,
child: toHero.child,
);
},
),
),
GestureDetector(
onTap: () {
Navigator.push(
context,
CupertinoPageRoute(builder: (BuildContext context) => CardPage(
start: Colors.amber,
end: Color(0xffaa0000),
tag: 'num3',
name: 'Random Person',
bank: 'Bank Of Baroda',
numb: '4577 0434 5678 9010',
date: '06/28',
),
fullscreenDialog: true
),
);
setState(() {
initial = 2;
});
},
child: Hero(
tag: 'num3',
child: Container(
padding: EdgeInsets.all(20),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(15),
gradient: LinearGradient(
colors: [
Colors.amber, Color(0xffaa0000)
],
begin: Alignment.topLeft,
end: Alignment.bottomRight
)
),
alignment: Alignment.topLeft,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Random Person",
style: TextStyle(fontSize: 40,color: Colors.white, fontWeight: FontWeight.bold,
decoration: TextDecoration.none
),
),
Text("\nBank Of Baroda",
style: TextStyle(fontSize: 30,color: Colors.grey[400], fontWeight: FontWeight.bold,
decoration: TextDecoration.none
),
),
],
),
),
flightShuttleBuilder: (
BuildContext flightContext,
Animation animation,
HeroFlightDirection flightDirection,
BuildContext fromHeroContext,
BuildContext toHeroContext,
) {
final Hero toHero = toHeroContext.widget;
return RotationTransition(
turns: animation,
child: toHero.child,
);
},
),
),
GestureDetector(
onTap: () {
Navigator.push(
context,
CupertinoPageRoute(builder: (BuildContext context) => CardPage(
start: Color(0xff4411ff),
end: Colors.pink,
tag: 'num4',
name: 'Ranveer Singh',
bank: 'HDFC Bank',
numb: '1299 5630 7612 8710',
date: '01/20',
),
fullscreenDialog: true
),
);
setState(() {
initial = 3;
});
},
child: Hero(
tag: 'num4',
child: Container(
padding: EdgeInsets.all(20),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(15),
gradient: LinearGradient(
colors: [
Color(0xff4411ff), Colors.pink
],
begin: Alignment.topLeft,
end: Alignment.bottomRight
)
),
alignment: Alignment.topLeft,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Ranveer Singh",
style: TextStyle(fontSize: 40,color: Colors.white, fontWeight: FontWeight.bold,
decoration: TextDecoration.none
),
),
Text("\nHDFC Bank",
style: TextStyle(fontSize: 30,color: Colors.grey[400], fontWeight: FontWeight.bold,
decoration: TextDecoration.none
),
),
],
),
),
flightShuttleBuilder: (
BuildContext flightContext,
Animation animation,
HeroFlightDirection flightDirection,
BuildContext fromHeroContext,
BuildContext toHeroContext,
) {
final Hero toHero = toHeroContext.widget;
return RotationTransition(
turns: animation,
child: toHero.child,
);
},
),
),
],
),
),
SizedBox(height: 20,),
Center(
child: Container(
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(10)
),
height: 100,
width: MediaQuery.of(context).size.width-30,
child: Text("Something Else", style: TextStyle(fontSize: 20),),
alignment: Alignment.center,
)
),
SizedBox(height: 20,)
],
),
),
),
);
}
}`
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