我将通过 API 在第一个屏幕上调用的数据列表传递到第二个屏幕,并且我能够一次打印所有数据。 但是现在我想一个一个地使用这些数据,我不知道该怎么做....你能帮忙吗?
这是第二个屏幕 -:
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'Home_View.dart';
class AboutScreen extends StatefulWidget {
final data;
AboutScreen({Key key,@required this.data}) : super(key: key);
@override
_AboutScreenState createState() => _AboutScreenState(data:data);
}
class _AboutScreenState extends State<AboutScreen> {
var data;
_AboutScreenState({this.data});
int i = 0;
@override
void initState() {
super.initState();
}
@override
Widget build(BuildContext context) {
print(data.toString()); // here i am printing all data
return Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Padding(
padding: const EdgeInsets.only(top: 150, bottom: 40),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Card(
elevation: 25,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(65),
),
child: CircleAvatar(
child: Icon(Icons.insert_emoticon_outlined, size: 100,),
radius: 80,
foregroundColor: Colors.deepPurpleAccent,
),
),
],
),
),
Text(
'${data[0][i.toString()]}', // here i wanted to get data individually but it's showing error
style: TextStyle(
fontSize: 30,
letterSpacing: 2.5,
fontWeight: FontWeight.bold,
),
),
SizedBox(height: 30,),
Text(
'Version 2.2',
style: TextStyle(
fontSize: 20,
letterSpacing: 2.5,
),
),
SizedBox(height: 30,),
Text(
'Developed By Black Console',
style: TextStyle(
fontSize: 20,
letterSpacing: 2.5,
),
),
SizedBox(height: 40,),
FloatingActionButton(
child: Icon(Icons.arrow_back_ios),
backgroundColor: Colors.deepPurpleAccent,
elevation: 16,
onPressed: (){
Navigator.pushReplacement(context, MaterialPageRoute(
builder: (context) => homeView()
));
},
),
],
),
);
}
}
以下是我以列表形式获得的数据-:
I/flutter ( 4689): {alternateno: [7845659877, 9865358577], coachaddress: [anand vihar, delhi, delhi, Gautam Budha nagar, noida], coachemail: [bct@gmail.com, SSG@gmail.com], coachid: [1, 2], coachname: [BCT Coaching, SSG Coaching], primary_number: [9865328899, 9898557898], userid: [1, 1]}
你能指导我吗..
答案 0 :(得分:0)
您的数据变量似乎是一个地图,而不是一个列表,因此您可以像这样访问它的值:
data['alternateno'][i]