App not working

[mainkolade]

DataSearch extends SearchDelegate<String>{
 final names = [
  "Davids",
  "Aigbogun",
  "Egunbiyi",
  "Onijesude",
  "Olurindeopelopejesu", 
  "AyeniFolakemi", 
  "ADEGBUYIOLUDAMOLA",
  "Oyebolu", 
  "AKINSOLAABISOLA",
 ];

  final recentnames = [
  "Onijesude",
  "Olurindeopelopejesu", 
  "AyeniFolakemi", 
  "ADEGBUYIOLUDAMOLA",
  ];

  @override
  List<Widget> buildActions(BuildContext context) {
    return [IconButton(icon: Icon(Icons.clear), 
    onPressed: () {
      query = "";
    })];
  }
  
  @override
  Widget buildLeading(BuildContext context) {
    return IconButton(
        icon: AnimatedIcon(
          icon: AnimatedIcons.menu_arrow,
          progress: transitionAnimation,
        ),
        onPressed: (){
          close(context, null);
        });
  }

  @override
  Widget buildResults(BuildContext context) {
    return Center(
      child: Container(
        height: 100.0,
        width: 100.0,
            child: Card(
          color: Colors.red,
            child: Center(
              child: Text(query),
            ),
          ),
      ),
    );
  }

  @override
  Widget buildSuggestions(BuildContext context) {
    final suggestionList = query.isEmpty
    ? recentnames
    : names.where((p) => p.startsWith(query)).toList();

    return ListView.builder(
      itemBuilder: (context,index)=>ListTile(
       onTap: (){
         showResults(context);
       },
      leading: Icon(Icons.location_city),
      title: RichText(text: TextSpan(
        text: suggestionList[index].substring(0,query.length),
        style: 
             TextStyle(color: Colors.black,fontWeight: FontWeight.bold),
        children: [TextSpan(
          text: suggestionList[index].substring(query.length),
          style:  TextStyle(color: Colors.grey))
        ]),
      )
    ),
     itemCount: suggestionList.length,
    );
  }

}


widget_test.dart

// This is a basic Flutter widget test.
//
// To perform an interaction with a widget in your test, use the WidgetTester
// utility that Flutter provides. For example, you can send tap and scroll
// gestures. You can also use WidgetTester to find child widgets in the widget
// tree, read text, and verify that the values of widget properties are correct.

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

import 'package:lom_search/main.dart';

void main() {
  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
    // Build our app and trigger a frame.
    await tester.pumpWidget(MyApp());

    // Verify that our counter starts at 0.
    expect(find.text('0'), findsOneWidget);
    expect(find.text('1'), findsNothing);

    // Tap the '+' icon and trigger a frame.
    await tester.tap(find.byIcon(Icons.add));
    await tester.pump();

    // Verify that our counter has incremented.
    expect(find.text('0'), findsNothing);
    expect(find.text('1'), findsOneWidget);
  });
}

[TahaTesser]

Hi @dyric
You need MediaQuery ancestor

Check out this code sample

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Material App',
      theme: ThemeData.dark(),
      home: Home(),
    );
  }
}

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Material App Bar'),
      ),
      body: Center(
        child: IconButton(
          icon: Icon(Icons.search),
          onPressed: () {
            showSearch(
              context: context,
              delegate: DataSearch(),
            );
          },
        ),
      ),
      floatingActionButton:
          FloatingActionButton(child: Icon(Icons.add), onPressed: () {}),
    );
  }
}

class DataSearch extends SearchDelegate {
  final names = [
    "Davids",
    "Aigbogun",
    "Egunbiyi",
    "Onijesude",
    "Olurindeopelopejesu",
    "AyeniFolakemi",
    "ADEGBUYIOLUDAMOLA",
    "Oyebolu",
    "AKINSOLAABISOLA",
  ];

  final recentnames = [
    "Onijesude",
    "Olurindeopelopejesu",
    "AyeniFolakemi",
    "ADEGBUYIOLUDAMOLA",
  ];

  @override
  List<Widget> buildActions(BuildContext context) {
    return [
      IconButton(
          icon: Icon(Icons.clear),
          onPressed: () {
            query = "";
          })
    ];
  }

  @override
  Widget buildLeading(BuildContext context) {
    return IconButton(
        icon: AnimatedIcon(
          icon: AnimatedIcons.menu_arrow,
          progress: transitionAnimation,
        ),
        onPressed: () {
          close(context, null);
        });
  }

  @override
  Widget buildResults(BuildContext context) {
    return Center(
      child: Container(
        height: 100.0,
        width: 100.0,
        child: Card(
          color: Colors.red,
          child: Center(
            child: Text(query),
          ),
        ),
      ),
    );
  }

  @override
  Widget buildSuggestions(BuildContext context) {
    final suggestionList = query.isEmpty
        ? recentnames
        : names.where((p) => p.startsWith(query)).toList();

    return ListView.builder(
      itemBuilder: (context, index) => ListTile(
          onTap: () {
            showResults(context);
          },
          leading: Icon(Icons.location_city),
          title: RichText(
            text: TextSpan(
                text: suggestionList[index].substring(0, query.length),
                style:
                    TextStyle(color: Colors.black, fontWeight: FontWeight.bold),
                children: [
                  TextSpan(
                      text: suggestionList[index].substring(query.length),
                      style: TextStyle(color: Colors.grey))
                ]),
          )),
      itemCount: suggestionList.length,
    );
  }
}

Let us know if resolves your issue
Thank you

[TahaTesser]

Hi @dyric
Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore
reluctantly going to close this bug for now. Please don't hesitate to comment on the bug if you have any
more information for us; we will reopen it right away!
Thanks for your contribution.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.