StackOverFlow-PrintData

main.dart

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: FilterScreen(),
        ),
      ),
    );
  }
}

class FilterScreen extends StatefulWidget {
  final int id= 1;
  @override
  _FilterScreenState createState() => _FilterScreenState();
}

class Post{
  int id;
  String authorName;
  String authorImageUrl;
  String timeAgo;
  String imageUrl;
  Post({this.id,this.authorName,this.authorImageUrl,this.timeAgo,this.imageUrl});
  
  Map<String, dynamic> toJson()=>{// to print the JSON
      'id': this.id,
      'authorName': this.authorName,
      'authorImageUrl': this.authorImageUrl,
      'timeAgo': this.timeAgo,
      'imageUrl': this.imageUrl,
    };
  @override
  String toString( ) {
    return 'authorName: $authorName'; // to just print the author name
    //return 'Post{id: $id, authorName: $authorName, authorImageUrl: $authorImageUrl, timeAgo: $timeAgo, imageUrl: $imageUrl}';
  }
  
}

class _FilterScreenState extends State<FilterScreen> {
  
  List showPost;
  final List<Post> posts = [
  Post(
    id: 0,
    authorName: 'Umaiz Khan',
    authorImageUrl: 'assets/images/user0.png',
    timeAgo: '5 min',
    imageUrl: 'assets/images/post0.jpg',
  ),
  Post(
    id: 1,
    authorName: 'Saad ahmed',
    authorImageUrl: 'assets/images/user1.png',
    timeAgo: '10 min',
    imageUrl: 'assets/images/post1.jpg',
  ),
  Post(
    id: 2,
    authorName: 'Hiba',
    authorImageUrl: 'assets/images/user4.png',
    timeAgo: '10 min',
    imageUrl: 'assets/images/post2.jpg',
  ),
];
  @override
  void initState(){
    super.initState();
  
    showPost = posts.where((i) => i.id == widget.id).toList();
    print(showPost.toJson());
    //you can print the id 

  }
  @override
  Widget build(BuildContext context) {
    return Container();
  }
}