flutter create todo_app
cd todo_app

class Todo {
  String title;
  String description;
  bool isCompleted;
  Todo({
    required this.title,
    required this.description,
    this.isCompleted = false,
  });}

import 'package:flutter/material.dart';import 'package:todo_app/models/todo.dart';import 'package:todo_app/screens/todo_edit_screen.dart';
class TodoListScreen extends StatefulWidget {
  @override
  _TodoListScreenState createState() => _TodoListScreenState();}
class _TodoListScreenState extends State {
  List _todos = [];
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('TODO List'),
      ),
      body: ListView.builder(
        itemCount: _todos.length,
        itemBuilder: (context, index) {
          final todo = _todos[index];
          return ListTile(
            title: Text(todo.title),
            subtitle: Text(todo.description),
            trailing: Checkbox(
              value: todo.isCompleted,
              onChanged: (value) {
                setState(() {
                  todo.isCompleted = value!;
                });
              },
            ),
            onTap: () {
              _navigateToEditScreen(todo);
            },
          );
        },
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          _navigateToEditScreen(null);
        },
        child: Icon(Icons.add),
      ),
    );
  }
  void _navigateToEditScreen(Todo? todo) async {
    final editedTodo = await Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => TodoEditScreen(todo: todo),
      ),
    );
    if (editedTodo != null) {
      setState(() {
        if (todo == null) {
          _todos.add(editedTodo);
        } else {
          final index = _todos.indexOf(todo);
          _todos[index] = editedTodo;
        }
      });
    }
  }}