Don't understand why this package - package:flutter/material.dart
can't be imported it worked in the previous Android Version Dolphin and
now get that error message "Target of URI doesn't exist" when I upgraded to Android
Version Electric Eel see screenshot of error msg. How do I resolve this?

import 'package:flutter/material.dart';
import 'dart:core';
import 'package:final_project1/second.dart';

Latest Android Studio version Electric Eel 2022.1 and flutter ver 3.7.1 .

Please download this food menu project from Github - . 

Using the Android Version listed above Electric Eel 2022.1 and flutter ver 3.7.1 are you able to get that flutter project to work? If you do can it you upload it to Github. Since that project consist of several separate pages to big to put it in here. Background it was working in an older version of Android Studio and previous flutter version. I'm hoping you can see the link because after submitting the question the link for Github would disappear when I review the question at least on my side.

I asked this question before I still don't get it. Using Flutter ver 3.3.2 

Return value is missing see attachment on the bottom of this page.

Here is the full code and the screenshot below the full code. Also when putting in the answer can you put in the full code. Because I put in the previous answers I still got error messages.

Thanks to everyone for there help on my previous question.

Using Flutter ver 3.3.8 and Android Studio Dolphin | 2021.3.1 Patch 1 (This is the latest version that i'm using. Since the book is using an older version.)

Modified the Widget with this code see below

Still having issues with this line of code -

if (inValue?.isEmpty) {
return "Please enter username";
}

Flutter shows this msg - A nullable expression can't be used as a condition. Try checking that the value isn't 'null' before using it as a condition. See screenshot of the message listed below. A;so put the full code below the screenshot.

import 'package:flutter/material.dart';

void main() {

runApp(const MyApp());

}



class MyApp extends StatefulWidget {

const MyApp({super.key});

@override

_MyApp createState() => _MyApp();

}


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) {
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.length < 10) {
return "Password must be >=10 in length";
}
return null;
},

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

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

ElevatedButton(

child : Text("Log In!"),

onPressed: (){

if (_formkey.currentState.validate()){

_formkey.currentState.save();

print ("Username: ${_loginData.username}");

print ("Password: ${_loginData.password}");

}

},

),

]

),

),

),

));

}

}