The same 2 errors appear in 2 different files when I run my flutter program, does anyone know how to fix this? this is my code
code for list restaurant.dart
import 'package:flutter/material.dart';
import 'package:resto_app/data/model/restaurant_list.dart';
import 'package:resto_app/ui/detail_page.dart';
class CardRestaurant extends StatelessWidget {
final Restaurant restaurant;
const CardRestaurant({Key? key, required this.restaurant}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
home: InkWell(
onTap: () {
Navigator.push(context, MaterialPageRoute(builder: (context) {
return RestaurantDetailPage(idrestaurant: restaurant.id);
}));
},
child: Stack(
children: <Widget>[
Container(
margin:
const EdgeInsets.only(left: 40, top: 5, right: 20, bottom: 5),
height: 170.0,
width: double.infinity,
decoration: BoxDecoration(
color: Colors.lime.shade100,
borderRadius: BorderRadius.circular(20.0),
),
child: Padding(
padding: const EdgeInsets.only(
left: 200, top: 20, right: 20, bottom: 20),
child: Expanded(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
SizedBox(
width: 120.0,
child: Expanded(child: Text(restaurant.name)),
),
_sizebox(10),
Row(
children: [
_icon(Icons.star_rate, 20, Colors.yellow),
Text(
' ${restaurant.rating}',
),
],
)
],
),
),
),
),
Positioned(
left: 20.0,
top: 15.0,
bottom: 15.0,
child: ClipRRect(
borderRadius: BorderRadius.circular(20.0),
child: Hero(
tag: restaurant.pictureId,
child: Image.network(
"https://restaurant-api.dicoding.dev/images/small/"
restaurant.pictureId,
width: 200,
fit: BoxFit.cover,
),
),
),
),
],
),
),
);
}
}
Widget _sizebox(double height) {
return SizedBox(
height: height,
);
}
Widget _icon(IconData icon, double size, Color color) {
return Icon(
icon,
size: size,
color: color,
);
}
and my detailrestaurant.dart code
`
`import 'package:flutter/material.dart';
import 'package:resto_app/data/model/restaurants_detail.dart';
import 'package:resto_app/common/constant.dart';
class RestaurantDetail extends StatelessWidget {
static const routeName = '/restaurant_detail';
final Restaurant restaurant;
const RestaurantDetail({Key? key, required this.restaurant})
: super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: SingleChildScrollView(
child: Column(
children: <Widget>[
Hero(
tag: restaurant.pictureId,
child: Image.network(
"https://restaurant-api.dicoding.dev/images/medium/"
restaurant.pictureId,
),
),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: const EdgeInsets.all(20),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(restaurant.name),
_sizebox(10),
Row(
children: [
_icon(Icons.location_city, 20, Colors.grey),
const SizedBox(
width: 10,
),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(restaurant.city),
Text(restaurant.address),
],
)
],
),
],
),
Row(
children: [
_icon(Icons.star_rate, 20, Colors.yellow),
Text(
' ${restaurant.rating}',
),
],
)
],
),
),
_barrierContent(),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
padding:
const EdgeInsets.only(top: 10, right: 20, left: 20),
child: Text('Description'),
),
Container(
padding: const EdgeInsets.only(
top: 10, right: 20, left: 20, bottom: 20),
width: double.infinity,
child: Text(restaurant.description)),
],
),
_barrierContent(),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 10, horizontal: 20),
child: Column(
children: [
Text('Category'),
ListBody(
children: restaurant.categories.map((food) {
return Text(
'- ${food.name}',
);
}).toList(),
),
],
),
),
_barrierContent(),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 10, horizontal: 20),
child: Column(
children: [
Text('Menu Food'),
ListBody(
children: restaurant.menus.foods.map((categori) {
return Text(
'- ${categori.name}',
);
}).toList(),
),
],
),
),
_barrierContent(),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 10, horizontal: 20),
child: Column(
children: [
Text('Menu Drink'),
ListBody(
children: restaurant.menus.drinks.map((drink) {
return Text('- ${drink.name}');
}).toList(),
),
],
),
),
_barrierContent(),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 10, horizontal: 10),
child: Column(
children: [
Text('Comment'),
ListBody(
children: restaurant.customerReviews.map((review) {
return Padding(
padding: const EdgeInsets.all(16.0),
child: Expanded(
child: Row(children: [
Container(
width: 40,
decoration: const BoxDecoration(
shape: BoxShape.circle,
color: Colors.blue),
child: Center(
child: Text(
review.name.characters.elementAt(0),
style: const TextStyle(
color: Colors.white, fontSize: 20),
)),
),
const SizedBox(
width: 15,
),
Expanded(
child: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Row(
children: [
Text(
review.name,
style: const TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold),
),
Text(
' ${review.date}',
style: TextStyle(
fontSize: 14,
color: Colors.grey.shade500),
)
],
),
SizedBox(
width: 270,
child: Text(
review.review,
maxLines: 2,
overflow: TextOverflow.ellipsis,
),
)
],
),
)
]),
),
);
}).toList(),
),
],
),
),
_barrierContent()
],
),
],
),
),
),
);
}
}
Widget _barrierContent() {
return Container(
height: 10,
color: Colors.grey.shade200,
);
}
Widget _sizebox(double height) {
return SizedBox(
height: height,
);
}
Widget _icon(IconData icon, double size, Color color) {
return Icon(
icon,
size: size,
color: color,
);
}
`
``
error The same 2 errors appear in 2 different files when I run my flutter program, does anyone know how to fix this?
CodePudding user response：
child: Expanded(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
SizedBox(
width: 120.0,
child: Expanded(child: Text(restaurant.name)),
),
parent of Expanded must be Stack, Column, Row but in your example it's wrong
CodePudding user response：
You should use Expanded only within a Column, Row or Flex & that to its top most child only
Here you have use Expanded widget inside padding widget which is inside stack and also you can't use Expanded inside stack, so it causing this ParentDataWidget Error
code for list restaurant.dart
class CardRestaurant extends StatelessWidget {
final Restaurant restaurant;
const CardRestaurant({Key? key, required this.restaurant}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
home: InkWell(
onTap: () {
Navigator.push(context, MaterialPageRoute(builder: (context) {
return RestaurantDetailPage(idrestaurant: restaurant.id);
}));
},
child: Stack( //---------------
children: <Widget>[
Container(
margin:
const EdgeInsets.only(left: 40, top: 5, right: 20, bottom: 5),
height: 170.0,
width: double.infinity,
decoration: BoxDecoration(
color: Colors.lime.shade100,
borderRadius: BorderRadius.circular(20.0),
),
child: Padding(//---------
padding: const EdgeInsets.only(
left: 200, top: 20, right: 20, bottom: 20),
child: Expanded(//--------- you can't use expanded inside Stack
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
SizedBox(
width: 120.0,
child: Expanded(child: Text(restaurant.name)),
),
_sizebox(10),
and my detailrestaurant.dart code
class RestaurantDetail extends StatelessWidget {
static const routeName = '/restaurant_detail';
final Restaurant restaurant;
const RestaurantDetail({Key? key, required this.restaurant})
: super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: SingleChildScrollView(
child: Column(
children: <Widget>[
Hero(
tag: restaurant.pictureId,
child: Image.network(
"https://restaurant-api.dicoding.dev/images/medium/"
restaurant.pictureId,
),
),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: const EdgeInsets.all(20),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(restaurant.name),
_sizebox(10),
Row(
children: [
_icon(Icons.location_city, 20, Colors.grey),
const SizedBox(
width: 10,
),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(restaurant.city),
Text(restaurant.address),
],
)
],
),
],
),
Row(
children: [
_icon(Icons.star_rate, 20, Colors.yellow),
Text(
' ${restaurant.rating}',
),
],
)
],
),
),
_barrierContent(),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
padding:
const EdgeInsets.only(top: 10, right: 20, left: 20),
child: Text('Description'),
),
Container(
padding: const EdgeInsets.only(
top: 10, right: 20, left: 20, bottom: 20),
width: double.infinity,
child: Text(restaurant.description)),
],
),
_barrierContent(),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 10, horizontal: 20),
child: Column(
children: [
Text('Category'),
ListBody(
children: restaurant.categories.map((food) {
return Text(
'- ${food.name}',
);
}).toList(),
),
],
),
),
_barrierContent(),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 10, horizontal: 20),
child: Column(
children: [
Text('Menu Food'),
ListBody(
children: restaurant.menus.foods.map((categori) {
return Text(
'- ${categori.name}',
);
}).toList(),
),
],
),
),
_barrierContent(),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 10, horizontal: 20),
child: Column(
children: [
Text('Menu Drink'),
ListBody(
children: restaurant.menus.drinks.map((drink) {
return Text('- ${drink.name}');
}).toList(),
),
],
),
),
_barrierContent(),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 10, horizontal: 10),
child: Column(
children: [
Text('Comment'),
ListBody(//--- this is top most child
children: restaurant.customerReviews.map((review) {
return Padding(
padding: const EdgeInsets.all(16.0),
child: Expanded(//--------- This causing problem here, you can only use Exapnded to column top most child
child: Row(children: [
Container(
width: 40,
decoration: const BoxDecoration(
shape: BoxShape.circle,
color: Colors.blue),
child: Center(
child: Text(
review.name.characters.elementAt(0),
style: const TextStyle(
color: Colors.white, fontSize: 20),
)),
),
const SizedBox(
width: 15,
),
Expanded(//---- This one also causing Problem
child: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Row(
children: [
Text(
review.name,
style: const TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold),
),
Text(
' ${review.date}',
style: TextStyle(
fontSize: 14,
color: Colors.grey.shade500),
)
],
),
SizedBox(
width: 270,
child: Text(
review.review,
maxLines: 2,
overflow: TextOverflow.ellipsis,
),
)
],
),
)
]),
),
);
}).toList(),
),
],
),
),
_barrierContent()
],
),
],
),
),
),
);
}
}
Keep this point in mind to avoid basic error
- Most common one Expanded can only use to a descendant of Column,Row & Flex
- Don't use Positioned under Row or Column instead use Align
- Under ListView don't use Spacer instead use SizedBox
Hope this might help you to solve your Error
Happy Learning!!!