show_search.dart

import 'package:flutter/material.dart';

class MyShowSearch extends StatefulWidget {
  const MyShowSearch({Key? key}) : super(key: key);

  @override
  State<MyShowSearch> createState() => _MyShowSearchState();
}

class _MyShowSearchState extends State<MyShowSearch> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Show Search'),
        actions: [
          IconButton(
            onPressed: () {
              showSearch(
                context: context,
                delegate: CustomSearchDelegate(),
              );
            },
            icon: const Icon(Icons.search),
          ),
        ],
      ),
    );
  }
}

class CustomSearchDelegate extends SearchDelegate {
  List<String> searchTerms = [
    'Apple',
    'Banana',
    'Pear',
    'Watermelons',
    'Oranges',
    'Blueberries',
    'Strawberries',
    'Raspberries'
  ];
  @override
  List<Widget> buildActions(BuildContext context) {
    return [
      IconButton(
        onPressed: () {
          query = '';
        },
        icon: const Icon(Icons.clear),
      ),
    ];
  }

  @override
  Widget? buildLeading(BuildContext context) {
    return IconButton(
      onPressed: () {
        close(context, null);
      },
      icon: const Icon(Icons.arrow_back),
    );
  }

  @override
  Widget buildResults(BuildContext context) {
    List<String> matchQuery = [];
    for (var fruit in searchTerms) {
      if (fruit.toLowerCase().contains(query.toLowerCase())) {
        matchQuery.add(fruit);
      }
    }
    return ListView.builder(
      itemCount: matchQuery.length,
      itemBuilder: (BuildContext context, int index) {
        var result = matchQuery[index];
        return ListTile(
          title: Text(result),
        );
      },
    );
  }

  @override
  Widget buildSuggestions(BuildContext context) {
    List<String> matchQuery = [];
    for (var fruit in searchTerms) {
      if (fruit.toLowerCase().contains(query.toLowerCase())) {
        matchQuery.add(fruit);
      }
    }
    return ListView.builder(
      itemCount: matchQuery.length,
      itemBuilder: (BuildContext context, int index) {
        var result = matchQuery[index];
        return ListTile(
          title: Text(result),
        );
      },
    );
  }
}