ListView With Like – Unlike In Flutter

Screenshot :

Program :

import 'package:flutter/material.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(title: 'ListView Like - Unlike'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List<Item> _itemList;

  @override
  void initState() {
    super.initState();

    _itemList = List<Item>();
    for (int i = 0; i < 10; i++) {
      _itemList.add(Item(
        title: 'Item $i',
        isFavorite: false,
      ));
    }
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        appBar: new AppBar(
          title: new Text(widget.title),
        ),
        body: new ListView.builder(
          itemCount: _itemList.length,
          itemBuilder: (context, index) {
            return ListItem(
              _itemList[index],
              () => onFavoritePressed(index),
            );
          },
        ));
  }

  onFavoritePressed(int index) {
    final item = _itemList[index];
    setState(() {
      item.isFavorite = !item.isFavorite;
    });
  }
}

class ListItem extends StatelessWidget {
  ListItem(this.item, this.onFavoritePressed);

  final Item item;
  final VoidCallback onFavoritePressed;

  @override
  Widget build(BuildContext context) {
    return new GestureDetector(
        onTap: (() {onFavoritePressed();}),
        child: ListTile(
            title: Text(item.title),
            leading: IconButton(
              icon: Icon(
                  item.isFavorite ? Icons.favorite : Icons.favorite_border),
            )));
  }
}

class Item {
  Item({this.title, this.isFavorite});

  String title;
  bool isFavorite;
}