Implementing a Search Functionality

This example shows how to create a search feature using a TextField to filter a list of items.

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Search Example',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: SearchExample(),
    );
  }
}

class SearchExample extends StatefulWidget {
  @override
  _SearchExampleState createState() => _SearchExampleState();
}

class _SearchExampleState extends State<SearchExample> {
  final List<String> _items = [
    'Apple',
    'Banana',
    'Cherry',
    'Date',
    'Fig',
    'Grapes',
    'Orange',
    'Peach',
    'Pineapple',
    'Strawberry',
  ];

  List<String> _filteredItems = [];
  String _searchQuery = '';

  @override
  void initState() {
    super.initState();
    _filteredItems = _items;
  }

  void _filterItems(String query) {
    if (query.isNotEmpty) {
      setState(() {
        _searchQuery = query;
        _filteredItems = _items
            .where((item) => item.toLowerCase().contains(query.toLowerCase()))
            .toList();
      });
    } else {
      setState(() {
        _searchQuery = '';
        _filteredItems = _items;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Search Example')),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: [
            TextField(
              onChanged: _filterItems,
              decoration: InputDecoration(
                labelText: 'Search',
                border: OutlineInputBorder(),
              ),
            ),
            SizedBox(height: 10),
            Expanded(
              child: ListView.builder(
                itemCount: _filteredItems.length,
                itemBuilder: (context, index) {
                  return ListTile(
                    title: Text(_filteredItems[index]),
                  );
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}