Develop Reference

How to have a ListView without scrolling the parent column view in flutter?

Please look at this image Home Page
Now when I scroll the ListView it becomes like this -
Home Page
Now I know the reason why this is happening, it is because I used ListView as a parent to this entire view and added ListView.builder() and other widgets as its child.
What I want is to scroll the ListView.builder() without scrolling the entire page.
For this I first tried to use Column as parent but that ended up giving the overflow pixels error.
And then I set the physics: const NeverScrollableScrollPhysics() inside the parent ListView but after that it made my ListView.builder() to show all of its list items.
Here is my Code for Home Screen
Widget build(BuildContext context) {
return Scaffold(
body: Column(
children: [
Expanded(
child: ListView(
padding: const EdgeInsets.only(top: 45, bottom: 24),
children: [
header(),
const SizedBox(height: 36),
const BalanceCard(),
const SizedBox(height: 36),
Recent()
],
),
),
Align(
alignment: Alignment.bottomCenter,
child: bottomNavigationBar(),
),
],
),
); }
Recent List Code
class RecentItems extends StatefulWidget {
final List<Transaction> transactions;
RecentItems({required this.transactions});
#override
State<RecentItems> createState() => _RecentItemsState();
}
class _RecentItemsState extends State<RecentItems> {
#override
Widget build(BuildContext context) {
return SizedBox(
height: 450,
child: Expanded(child: ListView.builder(
itemBuilder: (context, index) {
final item = widget.transactions[index].toString();
return Dismissible(
direction: DismissDirection.endToStart,
key: UniqueKey(),
onDismissed: (direction) {
setState(() {
widget.transactions.removeAt(index);
});
// Then show a snackbar.
ScaffoldMessenger.of(context)
.showSnackBar(const SnackBar(content: Text('Transaction Deleted')));
},
background: Container(
color: Colors.red,
alignment: AlignmentDirectional.centerEnd,
child: const Padding(
padding: EdgeInsets.fromLTRB(0.0, 0.0, 15.0, 0.0),
child: Icon(
EvaIcons.trash2,
color: Colors.white,
),
),
),
child: Card(
elevation: 5,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20.0),
),
child: ListTile(
leading: CircleAvatar(
radius: 30,
foregroundImage: widget.transactions[index].Image,
backgroundColor: primaryColor,
),
title: Text(
widget.transactions[index].title,
style: const TextStyle(color: secondaryColor),
),
subtitle: Text(
DateFormat.yMMMd().format(widget.transactions[index].date),
),
trailing: Text(
'\$${widget.transactions[index].amount}',
style: const TextStyle(color: secondaryColor),
),
),
),
);
},
itemCount: widget.transactions.length,
),)
);
}
}
Recent Widget -
#override
Widget build(BuildContext context) {
return Padding(
padding: const EdgeInsets.symmetric(horizontal: 24),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'Recent Transactions',
style: TextStyle(
fontSize: 15,
fontWeight: FontWeight.bold,
color: secondaryColor),
),
const SizedBox(height: 5),
RecentItems(transactions: _userTransactions),
],
),
)

The entire screen scrolls because Recent() is included in the same ListView as header() and balanceCard().
Try something like this:
Scaffold(
body: Column(
children: [
Expanded(
child: ListView(
padding: const EdgeInsets.only(top: 45, bottom: 24),
children: [
header(),
const SizedBox(height: 36),
const BalanceCard(),
const SizedBox(height: 36),
],
),
),
// Recent items removed from ListView
Recent(),
Align(
alignment: Alignment.bottomCenter,
child: bottomNavigationBar(),
),
],
),
)
I hope this helps.

By simplifying your code, this is an example of a layout where you have a single Column in the Scaffold. The Column contains some sized, unsized and aligned children.
One child, Recent is a ListView, without explicit height, but wrapped into an Expanded widget. This way it will occupy all the remaining area left by the other children, and it will be scrollable.
(You will run into trouble with this if the children without Recent occupy all the available area.)
Please have a look at this code, you can copy-paste it into a DartPad fiddle:
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Center(
child: MyWidget(),
),
),
);
}
}
class MyWidget extends StatelessWidget {
#override
Widget build(BuildContext context) => Scaffold(
body: Column(
children: [
const Text('header()'),
const SizedBox(height: 36),
const Text('BalanceCard()'),
const SizedBox(height: 36),
Expanded(child: Recent()),
const Align(
alignment: Alignment.bottomCenter,
child: Text('bottomNavigationBar()'),
),
],
),
);
}
class Recent extends StatelessWidget {
#override
Widget build(BuildContext context) => ListView.builder(
itemCount: 100, itemBuilder: (context, index) => Text('Item $index'));
}

Custom Dialog Flutter with many buttons

What I'm trying to do is create a custom dialog with many buttons in flutter,
When user press a button, my goal is to close custom dialog and know which button is pressed (in order to refresh my homepage by using of provider)
I define custom dialog with 2 button (for example). How I can achieve my goal?
That is the code:
CustomDialog.dart
import 'package:flutter/material.dart';
class CustomDialog extends StatelessWidget {
dialogContent(BuildContext context) {
return Container(
decoration: new BoxDecoration(
color: Colors.white,
shape: BoxShape.rectangle,
borderRadius: BorderRadius.circular(10),
boxShadow: [
BoxShadow(
color: Colors.black26,
blurRadius: 10.0,
offset: const Offset(0.0, 10.0),
),
],
),
child: Column(
mainAxisSize: MainAxisSize.min, // To make the card compact
children: <Widget>[
RaisedButton(
onPressed: (){},
child: Text("Button 1"),
),
RaisedButton(
onPressed: (){},
child: Text("Button 2"),
),
],
),
);
}
#override
Widget build(BuildContext context) {
return Dialog(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
elevation: 0.0,
backgroundColor: Colors.transparent,
child: dialogContent(context),
);
}
}
In main.dart I call it:
Container(
child: Center(
child: RaisedButton(
onPressed: (){
showDialog(context: context,
builder: (BuildContext context){
return CustomDialog(
);
}
);
},
child: Text("Custom Dialog"),
),
),
),

I solved in this way:
showDialog(context: context,
builder: (BuildContext context){
return CustomDialog(
);
}
).then((value) {
});
And in CustomDialog:
Navigator.pop(context, //** RETURNED VALUE**//);

From the dialog it is possible to return the value back to the place where it was opened
First, you have to wait for the value when you open the dialog
return Container(
child: Center(
child: RaisedButton(
onPressed: () async {
var pressedButtonNumber = await showDialog<int>(
context: context,
builder: (BuildContext context) {
return CustomDialog();
});
print(pressedButtonNumber);
},
child: Text("Custom Dialog"),
),
),
);
}
And then you have to return the value when you close the dialog
RaisedButton(
onPressed: () {
Navigator.of(context).pop(1);
},
child: Text("Button 1"),
),

Overlapping card effect in Flutter

How can I create an overlapping card effect in a SliverAppBar as shown in the figure:
I tried following this article of Medium but the problem is it uses Stack with
Stack{
...
overflow: Overflow.visible,
...
}
to implement this and in Stack, overflowing part of widgets don't take inputs thus making my TabBar half Dead.
What can I do to avoid this?

Full Code
import 'package:flutter/material.dart';
Future<void> main() async {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: MenuList(),
);
}
}
class MenuList extends StatefulWidget {
#override
_MenuListState createState() => _MenuListState();
}
class _MenuListState extends State<MenuList> {
static const double _appBarBottomBtnPosition =
24.0; //change this value to position your button vertically
#override
Widget build(BuildContext context) {
return Scaffold(
body: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
title: Text(
'Testing',
style: TextStyle(color: Colors.red),
),
),
SliverAppBar(
pinned: true,
expandedHeight: 200.0,
flexibleSpace: FlexibleSpaceBar(
centerTitle: true,
titlePadding: EdgeInsets.only(bottom: 25),
title: Text('Title'),
),
bottom: PreferredSize(
preferredSize: const Size.fromHeight(0.0),
child: Transform.translate(
offset: const Offset(0, _appBarBottomBtnPosition),
child: RaisedButton(
shape: StadiumBorder(),
child: Text("Click Here"),
onPressed: () {},
),
),
),
),
SliverPadding(
padding: EdgeInsets.only(top: _appBarBottomBtnPosition),
),
SliverFixedExtentList(
itemExtent: 50,
delegate: SliverChildBuilderDelegate(
(context, index){
Color color = Colors.red.withOpacity(1- (index%10)/10);
return Container(
color: color,
alignment: Alignment.center,
child: Text("Color: $color"),
);
}
),
),
],
),
);
}
}

Flutter - Change Height on vertical drag

Currently I am trying to develop a BottomSheet that expands to a specific size. When that size is reached, the user should be able to drag the BottomSheet a little bit up. I have implmented the GestureDetector inside the BottomSheet, so that I am able to detect a vertical drag. The drag function is called, but unfortunately it is not changing the size of the BottomSheet.
This is my code:
//These values are outside of the classes
double initial;
double _kShoppingMenuHeight;
//My custom BottomSheet with rounded corner
Future<T> showRoundedBottomSheet<T> ({
#required BuildContext context,
#required Widget child,
double height
}) {
assert(context != null);
assert(child != null);
return showModalBottomSheet(
context: context,
builder: (BuildContext context){
return new Container(
height: (height != null
? height
: 400.0
),
color: Color(0xFF737373),
child: new Container(
decoration: new BoxDecoration(
color: Colors.white,
borderRadius: new BorderRadius.only(
topLeft: const Radius.circular(5.0),
topRight: const Radius.circular(5.0)
)
),
child: Builder(
builder: (BuildContext context){
return child;
},
)
),
);
}
);
}
//The function that opens the BottomSheet
// this is in another class
return showRoundedBottomSheet(
context: context,
height: _kShoppingMenuHeight,
//Make bottomsheet draggable and fixed at specific point
child: ShoppingMenu(
title: _title("Ihre Listen"),
items: items
)
);
//The stateful widget with the content
return GestureDetector(
onVerticalDragStart: (DragStartDetails details){
initial = details.globalPosition.dy;
},
onVerticalDragUpdate: (DragUpdateDetails details){
setState(() {
_kShoppingMenuHeight = MediaQuery.of(context).size.height / 2 - details.globalPosition.dy;
if(_kShoppingMenuHeight.isNegative) _kShoppingMenuHeight = _kShoppingMenuHeight * (-1);
});
},
onVerticalDragEnd: (DragEndDetails details){
},
child: NotificationListener<OverscrollIndicatorNotification>(
onNotification: (overscroll){
overscroll.disallowGlow();
},
child: ConstrainedBox(
constraints: BoxConstraints(
minHeight: _kShoppingMenuHeight
),
child: ListView(
physics: NeverScrollableScrollPhysics(),
children: <Widget>[
Padding(
padding: EdgeInsets.only(top: 30.0, left: 10.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: EdgeInsets.only(bottom: 10.0),
child: widget.title,
),
Column(
children: widget.items
)
],
),
),
Divider(),
GestureDetector(
child: ListTile(
leading: Icon(Icons.add, color: Colors.black54),
title: Text(
"Neue Liste erstellen"
),
),
onTap: (){
Navigator.pop(context, "neue Liste");
},
),
Divider(),
GestureDetector(
child: ListTile(
leading: Icon(OMIcons.smsFailed, color: Colors.black54),
title: Text(
"Feedback geben"
),
),
onTap: (){
Navigator.pop(context, "feedback");
},
)
],
),
),
),
);

This is a complete example of how you can drag around with your modal bottom sheet.
The idea is to wrap the content of the sheet by a stream builder ,and update the stream when drag occurs. let me know if you need further explanation.
import 'package:flutter/material.dart';
import 'dart:async';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('My App'),
),
body: MyWidget(),
),
);
}
}
StreamController<double> controller = StreamController.broadcast();
class MyWidget extends StatefulWidget{
#override
_MyWidgetState createState() => _MyWidgetState();
}
class _MyWidgetState extends State<MyWidget> {
double position;
#override
Widget build(BuildContext context) {
return Container(
child: Center(
child: RaisedButton(
child: Text('Show Buttom Sheet'),
onPressed: () {
showModalBottomSheet(context: context, builder: (context){
return StreamBuilder(
stream: controller.stream,
builder:(context,snapshot) => GestureDetector(
onVerticalDragUpdate: (DragUpdateDetails details){
position = MediaQuery.of(context).size.height- details.globalPosition.dy;
print('position dy = ${position}');
position.isNegative?Navigator.pop(context)
:controller.add(position);
},
behavior: HitTestBehavior.translucent,
child:
Container(
color: Colors.red,
height: snapshot.hasData ? snapshot.data:200.0,
width: double.infinity,
child: Text('Child'),
)),
);
});
}),
),
);
}
}

I think setState() call on the wrong widget.
setState() need to be called on the widget holding the Scaffold because bottom sheet belongs to the scaffold itself .
inherited widget may be the solution

How to expand a card on tap in flutter?

I would like to achieve the material design card behavior on tap. When I tap it, it should expand fullscreen and reveal additional content/new page. How do I achieve it?
https://material.io/design/components/cards.html#behavior
I tried with Navigator.of(context).push() to reveal new page and play with Hero animations to move the card background to new Scaffold, however it seems it is not the way to go since new page is not revealing from the card itself, or I cannot make it to. I am trying to achieve the same behavior as in the material.io that I presented above. Would you please guide me somehow?
Thank you

A while ago I tried replicating that exact page/transition and while I didn't get it to look perfectly like it, I did get fairly close. Keep in mind that this was put together quickly and doesn't really follow best practices or anything.
The important part is the Hero widgets, and especially the tags that go along with them - if they don't match, it won't do it.
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
backgroundColor: Colors.deepPurple,
),
body: ListView.builder(
itemBuilder: (context, index) {
return TileItem(num: index);
},
),
),
);
}
}
class TileItem extends StatelessWidget {
final int num;
const TileItem({Key key, this.num}) : super(key: key);
#override
Widget build(BuildContext context) {
return Hero(
tag: "card$num",
child: Card(
shape: RoundedRectangleBorder(
borderRadius: const BorderRadius.all(
Radius.circular(8.0),
),
),
clipBehavior: Clip.antiAliasWithSaveLayer,
child: Stack(
children: <Widget>[
Column(
children: <Widget>[
AspectRatio(
aspectRatio: 485.0 / 384.0,
child: Image.network("https://picsum.photos/485/384?image=$num"),
),
Material(
child: ListTile(
title: Text("Item $num"),
subtitle: Text("This is item #$num"),
),
)
],
),
Positioned(
left: 0.0,
top: 0.0,
bottom: 0.0,
right: 0.0,
child: Material(
type: MaterialType.transparency,
child: InkWell(
onTap: () async {
await Future.delayed(Duration(milliseconds: 200));
Navigator.push(
context,
MaterialPageRoute(
builder: (context) {
return new PageItem(num: num);
},
fullscreenDialog: true,
),
);
},
),
),
),
],
),
),
);
}
}
class PageItem extends StatelessWidget {
final int num;
const PageItem({Key key, this.num}) : super(key: key);
#override
Widget build(BuildContext context) {
AppBar appBar = new AppBar(
primary: false,
leading: IconTheme(data: IconThemeData(color: Colors.white), child: CloseButton()),
flexibleSpace: Container(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [
Colors.black.withOpacity(0.4),
Colors.black.withOpacity(0.1),
],
),
),
),
backgroundColor: Colors.transparent,
);
final MediaQueryData mediaQuery = MediaQuery.of(context);
return Stack(children: <Widget>[
Hero(
tag: "card$num",
child: Material(
child: Column(
children: <Widget>[
AspectRatio(
aspectRatio: 485.0 / 384.0,
child: Image.network("https://picsum.photos/485/384?image=$num"),
),
Material(
child: ListTile(
title: Text("Item $num"),
subtitle: Text("This is item #$num"),
),
),
Expanded(
child: Center(child: Text("Some more content goes here!")),
)
],
),
),
),
Column(
children: <Widget>[
Container(
height: mediaQuery.padding.top,
),
ConstrainedBox(
constraints: BoxConstraints(maxHeight: appBar.preferredSize.height),
child: appBar,
)
],
),
]);
}
}
EDIT: in response to a comment, I'm going to write an explanation of how Hero works (or at least how I think it works =D).
Basically, when a transition between pages is started, the underlying mechanism that performs the transition (part of the Navigator more or less) looks for any 'hero' widgets in the current page and the new page. If a hero is found, its size and position is calculated for each of the pages.
As the transition between the pages is performed, the hero from the new page is moved to an overlay in the same place as the old hero, and then its size and position is animated towards its final size and position in the new page. (Note that you can change if you want with a bit of work - see this blog for more information about that).
This is what the OP was trying to achieve:
When you tap on a Card, its background color expands and becomes a background color of a Scaffold with an Appbar.
The easiest way to do this is to simply put the scaffold itself in the hero. Anything else will obscure the AppBar during the transition, as while it's doing the hero transition it is in an overlay. See the code below. Note that I've added in a class to make the transition happen slower so you can see what's going on, so to see it at normal speed change the part where it pushes a SlowMaterialPageRoute back to a MaterialPageRoute.
That looks something like this:
import 'dart:math';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
backgroundColor: Colors.deepPurple,
),
body: ListView.builder(
itemBuilder: (context, index) {
return TileItem(num: index);
},
),
),
);
}
}
Color colorFromNum(int num) {
var random = Random(num);
var r = random.nextInt(256);
var g = random.nextInt(256);
var b = random.nextInt(256);
return Color.fromARGB(255, r, g, b);
}
class TileItem extends StatelessWidget {
final int num;
const TileItem({Key key, this.num}) : super(key: key);
#override
Widget build(BuildContext context) {
return Hero(
tag: "card$num",
child: Card(
color: colorFromNum(num),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(
Radius.circular(8.0),
),
),
clipBehavior: Clip.antiAliasWithSaveLayer,
child: Stack(
children: <Widget>[
Column(
children: <Widget>[
AspectRatio(
aspectRatio: 485.0 / 384.0,
child: Image.network("https://picsum.photos/485/384?image=$num"),
),
Material(
type: MaterialType.transparency,
child: ListTile(
title: Text("Item $num"),
subtitle: Text("This is item #$num"),
),
)
],
),
Positioned(
left: 0.0,
top: 0.0,
bottom: 0.0,
right: 0.0,
child: Material(
type: MaterialType.transparency,
child: InkWell(
onTap: () async {
await Future.delayed(Duration(milliseconds: 200));
Navigator.push(
context,
SlowMaterialPageRoute(
builder: (context) {
return new PageItem(num: num);
},
fullscreenDialog: true,
),
);
},
),
),
),
],
),
),
);
}
}
class PageItem extends StatelessWidget {
final int num;
const PageItem({Key key, this.num}) : super(key: key);
#override
Widget build(BuildContext context) {
return Hero(
tag: "card$num",
child: Scaffold(
backgroundColor: colorFromNum(num),
appBar: AppBar(
backgroundColor: Colors.white.withOpacity(0.2),
),
),
);
}
}
class SlowMaterialPageRoute<T> extends MaterialPageRoute<T> {
SlowMaterialPageRoute({
WidgetBuilder builder,
RouteSettings settings,
bool maintainState = true,
bool fullscreenDialog = false,
}) : super(builder: builder, settings: settings, fullscreenDialog: fullscreenDialog);
#override
Duration get transitionDuration => const Duration(seconds: 3);
}
However, there are situations in which it might not be optimal to have the entire scaffold doing the transition - maybe it has a lot of data, or is designed to fit in a specific amount of space. In that case, an option to make a version of whatever you want to do the hero transition that is essentially a 'fake' - i.e. have a stack with two layers, one which is the hero and has a background colour, scaffold, and whatever else you want to show up during the transition, and another layer on top which completely obscures the bottom layer (i.e. has a background with 100% opacity) that also has an app bar and whatever else you want.
There are probably better ways of doing it than that - for example, you could specify the hero separately using the method mentioned in the blog I linked to.

I achieved this by using the Flutter Hero Animation Widget. In order to do that you will need:
A source page where you start from and that contains the card you want to expand to full screen. Let's call it 'Home'
A destination page that will represent how your card will look like once expanded. Let's call it 'Details'.
(Optional) A data model to store data
Now let's take a look at this example below (You can find the full project code here):
First, let's make an Item class (i will put it in models/item.dart) to store our data. Each item will have its own id, title, subtitle, details and image url :
import 'package:flutter/material.dart';
class Item {
String title, subTitle, details, img;
int id;
Item({this.id, this.title, this.subTitle, this.details, this.img});
}
Now, let's initialize our material app in the main.dart file :
import 'package:flutter/material.dart';
import 'package:expanding_card_animation/home.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: Home(),
);
}
}
Next, we will make our home page. It'll be a simple stateless widget, and will contain a list of Items that will be displayed in a ListView of Cards. A gesture detector is used to expand the card when tapping it. The expansion is just a navigation to the details page, but with the Hero animation, it looks like it just expanded the Card.
import 'package:flutter/material.dart';
import 'package:expanding_card_animation/details.dart';
import 'package:expanding_card_animation/models/item.dart';
class Home extends StatelessWidget {
List<Item> listItems = [
Item(
id: 1,
title: 'Title 1',
subTitle: 'SubTitle 1',
details: 'Details 1',
img:
'https://d1fmx1rbmqrxrr.cloudfront.net/cnet/i/edit/2019/04/eso1644bsmall.jpg'),
Item(
id: 2,
title: 'Title 2',
subTitle: 'SubTitle 2',
details: 'Details 2',
img:
'https://cdn.pixabay.com/photo/2015/04/23/22/00/tree-736885__340.jpg'),
Item(
id: 3,
title: 'Title 3',
subTitle: 'SubTitle 3',
details: 'Details 3',
img: 'https://miro.medium.com/max/1200/1*mk1-6aYaf_Bes1E3Imhc0A.jpeg'),
];
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Home screen'),
),
body: Container(
margin: EdgeInsets.fromLTRB(40, 10, 40, 0),
child: ListView.builder(
itemCount: listItems.length,
itemBuilder: (BuildContext c, int index) {
return GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Details(listItems[index])),
);
},
child: Card(
elevation: 7,
shape: RoundedRectangleBorder(
side: BorderSide(color: Colors.grey[400], width: 1.0),
borderRadius: BorderRadius.circular(10.0),
),
margin: EdgeInsets.fromLTRB(0, 0, 0, 20),
child: Column(
children: [
//Wrap the image widget inside a Hero widget
Hero(
//The tag must be unique for each element, so we used an id attribute
//in the item object for that
tag: '${listItems[index].id}',
child: Image.network(
"${listItems[index].img}",
scale: 1.0,
repeat: ImageRepeat.noRepeat,
fit: BoxFit.fill,
height: 250,
),
),
Divider(
height: 10,
),
Text(
listItems[index].title,
style: TextStyle(
fontSize: 20,
fontWeight: FontWeight.bold,
),
),
SizedBox(
height: 20,
),
],
),
),
);
}),
),
);
}
}
Finally, let's make the details page. It's also a simple stateless widget that will take the item's info as an input, and display them on full screen. Note that we wrapped the image widget inside another Hero widget, and make sure that you use the same tags used in the source page(here, we used the id in the passed item for that) :
import 'package:flutter/material.dart';
import 'package:expanding_card_animation/models/item.dart';
class Details extends StatelessWidget {
final Item item;
Details(this.item);
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
appBar: AppBar(
backgroundColor: Colors.transparent,
elevation: 0,
),
extendBodyBehindAppBar: true,
body: Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Hero(
//Make sure you have the same id associated to each element in the
//source page's list
tag: '${item.id}',
child: Image.network(
"${item.img}",
scale: 1.0,
repeat: ImageRepeat.noRepeat,
fit: BoxFit.fitWidth,
height: MediaQuery.of(context).size.height / 3,
),
),
SizedBox(
height: 30,
),
ListTile(
title: Text(
item.title,
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 20,
),
),
subtitle: Text(item.subTitle),
),
Divider(
height: 20,
thickness: 1,
),
Padding(
padding: EdgeInsets.only(left: 20),
child: Text(
item.details,
style: TextStyle(
fontSize: 25,
),
),
),
],
),
),
),
);
}
}
And that's it, now you can customize it as you wish. Hope i helped.