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Hi I fixed the material dart issue - https://oneclass.com/question/7345764-dont-understand-why-this-packa.en.html
By following people suggestions and also committed the pubspec.yaml file.
That error msg wasn't there before until I made change to fix the material.dart issue.
But now I'm getting that same error msg for
import 'package:final_project1/second.dart';
See screenshot at the bottom.
import 'package:flutter/material.dart';
import 'dart:core';
import 'package:final_project1/second.dart';
//test
void main() {
runApp(const App());
}

My pubspec.yaml - name: final_project1
description: Food Ordering

# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
# In Windows, build-name is used as the major, minor, and patch parts
# of the product and file versions while build-number is used as the build suffix.
version: 1.0.0+1

environment:
sdk: '>=2.17.1 <3.0.0'

# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
flutter:
sdk: flutter
# Add the dependency
flutter_material: material.dart

# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^1.0.2

dev_dependencies:
flutter_test:
sdk: flutter

# The "flutter_lints" package below contains a set of recommended lints to
# encourage good coding practices. The lint set provided by the package is
# activated in the `analysis_options.yaml` file located at the root of your
# package. See that file for information about deactivating specific lint
# rules and activating additional ones.
flutter_lints: ^2.0.0

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter packages.
flutter:

# The following line ensures that the Material Icons font is
# included with your application, so that you can use the icons in
# the material Icons class.
uses-material-design: true

# To add assets to your application, add an assets section, like this:
assets:
- images/


# An image asset can refer to one or more resolution-specific "variants", see
#

# For details regarding adding assets from package dependencies, see
#

# To add custom fonts to your application, add a fonts section here,
# in this "flutter" section. Each entry in this list should have a
# "family" key with the font family name, and a "fonts" key with a
# list giving the asset and other descriptors for the font. For
# example:
# fonts:
# - family: Schuyler
# fonts:
# - asset: fonts/Schuyler-Regular.ttf
# - asset: fonts/Schuyler-Italic.ttf
# style: italic
# - family: Trajan Pro
# fonts:
# - asset: fonts/TrajanPro.ttf
# - asset: fonts/TrajanPro_Bold.ttf
# weight: 700
#
# For details regarding fonts from package dependencies,
# see


pubspec.yaml screenshot below

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Related questions

Is there a way to upload an flutter project here for people here to review it? See screenshot  notice the flutter program contains 5 separate pages -

main.dart, second.dart, third.dart, pubspec.yaml and bt1.dart I submitted the question earlier ,but I forgot to attach a screenshot.

Using Flutter 3.3.8 by the way it requires me to use const to those who say I need to remove them. Anyway after taking people's suggestions created a widget for the return line.

But now asking for class for the _formkey. What do I type in for the class for the _formkey?

class MyAppState extends State<MyApp>{
@override
Widget build(BuildContext context) {
return Form(
key: _formkey,
child: Column(
children: const [
// Input fields and submit button go here
],
),
);
}
See screenshot and the full code below.   import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

void main() {

runApp( const MyApp());
}
class MyAppState extends State<MyApp>{
@override
Widget build(BuildContext context) {
return Form(
key: _formkey,
child: Column(
children: const [
// Input fields and submit button go here
],
),
);
}
}



class MyApp extends StatefulWidget {

const MyApp({super.key});

@override

MyAppState createState() => MyAppState();
}

class LoginData {
String username = "";
String password = "";
}

class _MyApp extends State {

LoginData loginData = LoginData();
final GlobalKey<FormState> _formkey = GlobalKey<FormState>();
@override

Widget build(BuildContext inContext) {
return MaterialApp(home: Scaffold(
body : Container(
padding : const EdgeInsets.all(50.0),
child : Form(
key: _formkey,
child: Column(
children: [
TextFormField(
keyboardType: TextInputType.emailAddress,
validator: (String? inValue) {
if (inValue?.isEmpty?? true) {
return "Please enter username";
}
return null;
},
onSaved: (String? inValue) {
loginData.username = inValue!;
},

decoration: const InputDecoration(
hintText: "[email protected]",
labelText: "Username (eMail address)"
),
),

TextFormField(

obscureText: true,

validator: (String? inValue) {
if (inValue == null) {
return "Password cannot be null";
} else if (inValue.length < 10) {
return "Password must be >= 10 in length";
}
return null;
},

onSaved: (String? inValue) {
loginData.password = inValue!;
},

decoration: const InputDecoration(
hintText : "Password",
labelText : "Password"
),
),

ElevatedButton(

child : const Text("Log In!"),

onPressed: (){

if (_formkey.currentState!.validate()){

_formkey.currentState!.save();

if (kDebugMode) {
debugPrint ("Username: ${loginData.username}");
}
if (kDebugMode) {
debugPrint ("Password: ${loginData.password}");
}

}

},

),

]

),

),

),

));

}

}


Using Flutter ver 3.3.6 the following flutter program  gets

No MediaQuery widget ancestor found. Someone gave me an example of this but I have no idea where to put it  my code.

return MediaQuery(

    data: MediaQueryData(),

    child: MaterialApp(

    home: Scaffold(

    body: SizedBox(

    height: MediaQuery.of(context).size.height,

    child: const Dashboard(),

   ),

)

My Original code listed below

import 'package:flutter/material.dart';
void main() {runApp(const FoodList());}

class MyApp extends StatelessWidget {
const MyApp({super.key});

@override
Widget build(BuildContext context) {
return const MaterialApp(
home: FoodList(),
);
}
}



class FoodList extends StatelessWidget {
const FoodList({super.key});

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("Food List"),
),
body: ListView(
children: const <Widget>[
ListTile(
title: Text("Food Item 1"),
trailing: Checkbox(value: false, onChanged: null),
),
ListTile(
title: Text("Food Item 2"),
trailing: Checkbox(value: false, onChanged: null),
),
ListTile(
title: Text("Food Item 3"),
trailing: Checkbox(value: false, onChanged: null),
),
ListTile(
title: Text("Food Item 4"),
trailing: Checkbox(value: false, onChanged: null),
),
ListTile(
title: Text("Food Item 5"),
trailing: Checkbox(value: false, onChanged: null),
),
ElevatedButton(
onPressed: null,
child: Text('Submit'),
)
],
),
);
}
}

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