I'm new to flutter,I ran into a problem.I need to specify
Facilities facilities = facilitiesList[index];
But I have an error on the word index. I'm passing the list into a list view builder. Please find my code below and this the error:
"message": "A value of type 'Map<dynamic, dynamic>' can't be assigned to a variable of type 'Facilities'.\nTry changing the type of the variable, or casting the right-hand type to 'Facilities'.",
import 'package:flutter/material.dart';
import 'package:oracle_diamond_02/model/facilities.dart';
import 'package:oracle_diamond_02/screen/facilities_details_screen.dart';
class FacilitiesListScreen extends StatefulWidget {
FacilitiesListScreen({Key? key}) : super(key: key);
_FacilitiesListScreenState createState() => _FacilitiesListScreenState();
}
class _FacilitiesListScreenState extends State<FacilitiesListScreen> {
final TextStyle dropdownMenuItem =
TextStyle(color: Colors.black, fontSize: 18);
final primary = Color.fromARGB(255, 206, 84, 84);
final secondary = Color(0xfff29a94);
final List<Map> facilitiesList = [
{
"name": "Badminton Court",
"location": "UTM Convention Hall",
"type": "Indoor Courts",
"logoText":
"https://firebasestorage.googleapis.com/v0/b/oracle-diamond-02.appspot.com/o/badminton.jpg?alt=media"
},
{
"name": "PingPong Court",
"location": "UTM Convention Hall",
"type": "Indoor Courts",
"logoText":
"https://firebasestorage.googleapis.com/v0/b/oracle-diamond-02.appspot.com/o/pinpong.jpg?alt=media"
},
{
"name": "Futsal Court",
"location": "UTM Convention Hall",
"type": "Indoor Courts",
"logoText":
"https://firebasestorage.googleapis.com/v0/b/oracle-diamond-02.appspot.com/o/futsal.jpg?alt=media"
},
{
"name": "Tennis Court",
"location": "UTM Convention Hall",
"type": "Outdoor Courts",
"logoText":
"https://firebasestorage.googleapis.com/v0/b/oracle-diamond-02.appspot.com/o/tennis.jpg?alt=media"
},
];
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Color(0xfff0f0f0),
body: SingleChildScrollView(
child: Container(
height: MediaQuery.of(context).size.height,
width: MediaQuery.of(context).size.width,
child: Stack(
children: <Widget>[
Container(
padding: EdgeInsets.only(top: 145),
height: MediaQuery.of(context).size.height,
width: double.infinity,
child: ListView.builder(
itemCount: facilitiesList.length,
itemBuilder: (BuildContext context, int index) {
Facilities facilities = facilitiesList[index];
Card(
child: ListTile(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
FacilitiesDetailsScreen(facilities)));
},
));
return buildList(context, index);
})),
Container(
height: 140,
width: double.infinity,
decoration: BoxDecoration(
color: primary,
borderRadius: BorderRadius.only(
bottomLeft: Radius.circular(30),
bottomRight: Radius.circular(30))),
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 30),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
IconButton(
onPressed: () {},
icon: Icon(
Icons.menu,
color: Colors.white,
),
),
Text(
"List of Facilities",
style: TextStyle(color: Colors.white, fontSize: 24),
),
IconButton(
onPressed: () {},
icon: Icon(
Icons.filter_list,
color: Colors.white,
),
),
],
),
),
),
Container(
child: Column(
children: <Widget>[
SizedBox(
height: 110,
),
Padding(
padding: EdgeInsets.symmetric(horizontal: 20),
child: Material(
elevation: 5.0,
borderRadius: BorderRadius.all(Radius.circular(30)),
child: TextField(
// controller: TextEditingController(text: locations[0]),
cursorColor: Theme.of(context).primaryColor,
style: dropdownMenuItem,
decoration: InputDecoration(
hintText: "Search Facilities",
hintStyle: TextStyle(
color: Colors.black38, fontSize: 16),
prefixIcon: Material(
elevation: 0.0,
borderRadius:
BorderRadius.all(Radius.circular(30)),
child: Icon(Icons.search),
),
border: InputBorder.none,
contentPadding: EdgeInsets.symmetric(
horizontal: 25, vertical: 13)),
),
),
),
],
),
)
],
),
),
),
);
}
Widget buildList(BuildContext context, int index) {
return Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(25),
color: Colors.white,
),
width: double.infinity,
height: 110,
margin: EdgeInsets.symmetric(vertical: 10, horizontal: 20),
padding: EdgeInsets.symmetric(vertical: 10, horizontal: 20),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Container(
width: 50,
height: 50,
margin: EdgeInsets.only(right: 15),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(50),
border: Border.all(width: 3, color: secondary),
image: DecorationImage(
image: NetworkImage(facilitiesList[index]['logoText']),
fit: BoxFit.fill),
),
),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
facilitiesList[index]['name'],
style: TextStyle(
color: primary,
fontWeight: FontWeight.bold,
fontSize: 18),
),
SizedBox(
height: 6,
),
Row(
children: <Widget>[
Icon(
Icons.location_on,
color: secondary,
size: 20,
),
SizedBox(
width: 5,
),
Text(facilitiesList[index]['location'],
style: TextStyle(
color: primary, fontSize: 13, letterSpacing: .3)),
],
),
SizedBox(
height: 6,
),
Row(
children: <Widget>[
Icon(
Icons.sports_tennis,
color: secondary,
size: 20,
),
SizedBox(
width: 5,
),
Text(facilitiesList[index]['type'],
style: TextStyle(
color: primary, fontSize: 13, letterSpacing: .3)),
],
),
],
),
)
],
),
);
}
}
CodePudding user response：
You have a list of maps. Not a list of Facilities instances. Nowhere are you creating Facilities instances. I don't know what that class looks like but I can imaginge it has a fromMap function or something similar. Then you probably want to do this instead
Facilities facilities = Facilities.fromMap(facilitiesList[index]);
CodePudding user response：
Please try set your data in Map instead of Facilities because facilitiesList is list of Map not list of Facilities
Your code
Facilities facilities = facilitiesList[index];
Correct method
Map facilities = facilitiesList[index];