Mobile

import 'package:flutter/material.dart';
import './practice2.dart';
import './practice3.dart';
void main()
{
  runApp(MaterialApp(home:Akanksha()));
}
class Akanksha extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return AkankshaState();
  }
}

class AkankshaState extends State<Akanksha>{
  final questions=const[
    {'questionText':'what is your favourite colour?','answers':['black','green','blue'],
    },
    {'questionText':'what is your fav drama?','answers':['black','green','blue'],
    },
    {'questionText':'what is your favourite animal?','answers':['black','green','blue'],
    },
  ];
  var _questionIndex=0;
  void answerQuestion(){
    // var aBool=true;
    // aBool=false;
    setState((){
_questionIndex= _questionIndex+1;
    });
print(_questionIndex);
    if (_questionIndex<questions.length){print('We have more question!');}
else{print('no more questions!');}
  }
  @override
  Widget build(BuildContext context) {


    return Scaffold(
      appBar:AppBar(backgroundColor: Colors.deepOrange,
          title:Text('my app')),
      body:_questionIndex<questions.length ?
      Column(
         //mainAxisAlignment: MainAxisAlignment,
         children: [
           Question( questions[_questionIndex]['questionText'], ), ...
           (
               questions[_questionIndex]['answers'] as List).map((answer){
  return Answer(answerQuestion , answer);
      }).toList(),
// Answer(answerQuestion),
//
// Answer(answerQuestion),
//
//            Answer(answerQuestion),
         ],
       ): Center(child:Text('you did it!')),

    );
  }
}

import 'package:flutter/material.dart';
import './practice2.dart';
import './practice3.dart';
void main()
{
  runApp(MaterialApp(home:Akanksha()));
}
class Akanksha extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return AkankshaState();
  }
}

class AkankshaState extends State<Akanksha>{
  final questions=const[
    {'questionText':'what is your favourite colour?','answers':['black','green','blue'],
    },
    {'questionText':'what is your fav drama?','answers':['black','green','blue'],
    },
    {'questionText':'what is your favourite animal?','answers':['black','green','blue'],
    },
  ];
  var _questionIndex=0;
  void answerQuestion(){
    // var aBool=true;
    // aBool=false;
    setState((){
_questionIndex= _questionIndex+1;
    });
print(_questionIndex);
    if (_questionIndex<questions.length){print('We have more question!');}
else{print('no more questions!');}
  }
  @override
  Widget build(BuildContext context) {


    return Scaffold(
      appBar:AppBar(backgroundColor: Colors.deepOrange,
          title:Text('my app')),
      body:_questionIndex<questions.length ?
      Column(
         //mainAxisAlignment: MainAxisAlignment,
         children: [
           Question( questions[_questionIndex]['questionText'], ), ...
           (
               questions[_questionIndex]['answers'] as List).map((answer){
  return Answer(answerQuestion , answer);
      }).toList(),

         ],
       ): Center(child:Text('you did it!')),

    );
  }
}
 :wtf: 

import 'package:flutter/material.dart';
class Question extends StatelessWidget {
 //final String questionText;
 // Question(this.questionText);
 String questionText;
 Question(this.questionText);
  @override
  Widget build(BuildContext context) {
    return Container(
      margin: EdgeInsets.all(20),
        width: double.infinity,
       child:Text(questionText,style:TextStyle(fontSize: 25),textAlign: TextAlign.center,)

       // child: Text(questionText,style:TextStyle(fontSize: 25),textAlign:TextAlign.center,)
   );
  }
}

import 'package:flutter/material.dart';
class Answer extends StatelessWidget {
  final Function selectHandler;
  final String answerText;
Answer(this.selectHandler, String this.answerText);
  @override
  Widget build(BuildContext context) {
    return Container(
      width:double.infinity,
      child:ElevatedButton(
          style: TextButton.styleFrom(backgroundColor: Colors.blueGrey,
              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10))),
          onPressed: ()=> selectHandler(),
          child:Text(answerText,style:TextStyle(color:Colors.white,fontSize:20))),
    );
  }
}

public interface IRepository
   {
       [Get("/package/")]
       Task<Resultado> GetAllData();
   }

public class PaqueteServicio
   {
       public const string API_BASE_URL = "http://www.mi.traelopaq.net/listarpaqjson.php?text1=2264&text2=pOADSIQMASD.O398AJas&KEYAPI=ODUTRAS.9di23821@ldpli2skjs43&KEYPASo=OASmsjdu38IO1p29AA93JA0OD9K1221";

       private IRepository repo;
       public PaqueteServicio()
       {
           repo = RestService.For<IRepository>(API_BASE_URL);
       }
       public Task<Resultado> Get()
       {
           return repo.GetAllData();
       }
   }

public class Package
{
        [JsonProperty("peso")]
        public string Peso { get; set; }

        [JsonProperty("tracking_number")]
        public string TrackingNumber { get; set; }

        [JsonProperty("contenido")]
        public string Contenido { get; set; }

public class Resultado
  {
      [JsonProperty("results")]
      public Package[] Results { get; set; }
  }

class MainViewModel : BaseViewModel
   {
       private readonly PaqueteServicio paqueteServicio;
       private List<Package> paqueteList;
       public List<Package> PaqueteList
       {
           get => paqueteList;
           set
           {
               paqueteList = value;
               RaisePropertyChanged();
           }
       }
       public ICommand ClickCommand => new Command(ClickCommandExecute);

       private async void ClickCommandExecute()
       {
           var response= await paqueteServicio.Get();  //This line is the one with the Error
           PaqueteList = response.Results.ToList();
       }

       public MainViewModel()
       {
           paqueteServicio = new PaqueteServicio();
       }
   }