The following StateError was thrown while executing callbacks for FrameTiming:

Question

I have the Flutter 2.10.5 version of android studio, the app works fine when I run it, but on terminal showed this messages, what should I do? I got this error from terminal:

Performing hot restart...
Syncing files to device sdk gphone x86...
Restarted application in 1,150ms.

======== Exception caught by Flutter framework =====================================================
The following StateError was thrown while executing callbacks for FrameTiming:
Bad state: Future already completed

When the exception was thrown, this was the stack: 
#1      WidgetsBinding.drawFrame.<anonymous closure> (package:flutter/src/widgets/binding.dart:872:30)
#2      SchedulerBinding._executeTimingsCallbacks (package:flutter/src/scheduler/binding.dart:286:19)
#6      _invoke1 (dart:ui/hooks.dart:170:10)
#7      PlatformDispatcher._reportTimings (dart:ui/platform_dispatcher.dart:494:5)
#8      _reportTimings (dart:ui/hooks.dart:110:31)
(elided 4 frames from dart:async)
The TimingsCallback that gets executed was: Closure: (List<FrameTiming>) => void
====================================================================================================

This is my code:

home_screen.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_golang_yt/colors/app_colors.dart';
import 'package:flutter_golang_yt/widgets/button_widget.dart';

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

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        width: double.maxFinite,
        height: double.maxFinite,
        padding: const EdgeInsets.only(left: 20, right: 20),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            RichText(
                text: TextSpan(
                  text: "Hello",
                  style: TextStyle(
                    color: AppColors.mainColor,
                    fontSize: 60,
                    fontWeight: FontWeight.bold
                  ),
                  children: [
                    TextSpan(
                    text: "\nGet up early!",
                    style: TextStyle(
                        color: AppColors.smallTextColor,
                        fontSize: 30,
                    ))
                  ]
                ),
            ),
            SizedBox(height: MediaQuery.of(context).size.height/2.5,),
            ButtonWidget(backgroundcolor: AppColors.mainColor,
                text: "Add Task",
                textColor: Colors.white),
            const SizedBox(height: 20,),
            ButtonWidget(backgroundcolor: Colors.white,
                text: "View All",
                textColor: AppColors.smallTextColor)
          ],
        ),
        decoration: const BoxDecoration(
          image: DecorationImage(
            fit: BoxFit.cover,
            image: AssetImage(
              "assets/welcome.jpg"
            )
          )
        ),
      ),
    );
  }
}

main.dart

import 'package:flutter/material.dart';
import 'package:flutter_golang_yt/screens/add_task.dart';
import 'package:flutter_golang_yt/screens/all_tasks.dart';
import 'package:flutter_golang_yt/screens/home_screen.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(

        primarySwatch: Colors.blue,
      ),
      home: const AllTasks(),
    );
  }
}

add_task.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_golang_yt/colors/app_colors.dart';
import 'package:flutter_golang_yt/widgets/button_widget.dart';
import 'package:flutter_golang_yt/widgets/textfield_widget.dart';

class AddTask extends StatelessWidget {
  const AddTask({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    TextEditingController nameController = TextEditingController();
    TextEditingController detailController = TextEditingController();
    return Scaffold(
      body: Container(
        width: double.maxFinite,
        height: double.maxFinite,
        padding: const EdgeInsets.only(left: 20, right: 20),
        decoration: const BoxDecoration(
          image: DecorationImage(
            fit: BoxFit.cover,
            image: AssetImage(
              "assets/addtask1.jpg"
            )
          )
        ),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Column(
              children: [
                const SizedBox(height: 60,),
                IconButton(onPressed: (){},
                    icon: Icon(Icons.arrow_back,
                        color: AppColors.secondaryColor,
                ))
              ],
            ),
            Column(
              children:  [
                TextFieldWidget(textController: nameController,
                    hintText: "Task name",
                    borderRadius: 30),
                const SizedBox(height: 20,),
                TextFieldWidget(textController: detailController,
                    hintText: "Task detail",
                    borderRadius: 15,
                maxLines: 3,),
                const SizedBox(height: 20,),
                ButtonWidget(backgroundcolor: AppColors.mainColor,
                    text: "Add", textColor: Colors.white)
              ],
            ),
            SizedBox(
              height: MediaQuery.of(context).size.height/6,
            )
          ],
        ),
      ),
    );
  }
}

task_widget.dart

import 'package:flutter/cupertino.dart';

class TaskWidget extends StatelessWidget {
  final String text;
  final Color? color;
  const TaskWidget({Key? key, required this.text,
    required this.color}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.maxFinite,
      height: MediaQuery.of(context).size.height/14,
      decoration: BoxDecoration(
        color: Color(0xFFedf0f8),
        borderRadius: BorderRadius.circular(10)
      ),
      child: Center(
        child: Text(text, style: TextStyle(
          fontSize: 20,
          color: color,
        ),),
      ),
    );
  }
}

all_tasks.dart

import 'package:flutter/material.dart';
import 'package:flutter_golang_yt/colors/app_colors.dart';
import 'package:flutter_golang_yt/widgets/task_widget.dart';

class AllTasks extends StatelessWidget {
  const AllTasks({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    List myData =[
      "Disciplina tu cerebro",
      "rendirse es perder"
    ];
    return Scaffold(
      backgroundColor: Colors.white,
      body: Column(
        children: [
          Container(
            padding: const EdgeInsets.only(left: 20, top: 60),
            alignment: Alignment.topLeft,
            child: Icon(Icons.arrow_back, color: AppColors.secondaryColor,),
            width: double.maxFinite,
            height: MediaQuery.of(context).size.height/3.2,
            decoration: BoxDecoration(
              image: DecorationImage(
                fit: BoxFit.cover,
                image: AssetImage(
                  "assets/header1.jpg"
                )
              )
            ),
          ),
          Container(
            padding: const EdgeInsets.only(left: 20, right: 20),
            child: Row(
              children: [
                Icon(Icons.home, color: AppColors.secondaryColor,),
                SizedBox(width: 10,),
                Container(
                  child: Icon(Icons.add, color: Colors.white,size: 20,),
                  width: 25,
                  height: 25,
                  decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(12.5),
                    color: Colors.black
                  ),
                ),
                Expanded(child: Container()),
                Icon(Icons.calendar_month_sharp, color: AppColors.secondaryColor,),

                SizedBox(width: 10,),
                Text("2", style: TextStyle(
                  fontSize: 20,
                  color: AppColors.secondaryColor
                ),)
              ],
            ),
          ),
          Flexible(
            child: ListView.builder(
                itemCount: myData.length,
                itemBuilder: (context, index){
              return Dismissible(
                onDismissed: (DismissDirection direction) {
                  print("after dismiss");
                },
                confirmDismiss: (DismissDirection direction)async{
                  print("confirming");
                  return false;
                },
                key: ObjectKey(index),
                child: Container(
                  margin: const EdgeInsets.only(left: 20, right: 20, bottom: 10),
                  child: TaskWidget(
                    text: myData[index],
                    color: Colors.blueGrey,
                  ),
                ),
              );
            }),
          )
        ],
      ),
    );
  }
}

textfield_widget.dart

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

import '../colors/app_colors.dart';

class TextFieldWidget extends StatelessWidget {
  final TextEditingController textController;
  final String hintText;
  final double? borderRadius;
  final int? maxLines;
   const TextFieldWidget({Key? key,
     required this.textController,
     required this.hintText,
      this.borderRadius=30,
   this.maxLines=1}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return TextField(
      maxLines: maxLines,
      controller: textController,
      decoration: InputDecoration(
          filled: true,
          fillColor: AppColors.textHolder,
          hintText: hintText,
          focusedBorder: OutlineInputBorder(
              borderRadius: BorderRadius.circular(borderRadius!),
              borderSide: const BorderSide(
                  color:Colors.white,
                  width: 1
              )
          ),
          enabledBorder: OutlineInputBorder(
              borderRadius: BorderRadius.circular(borderRadius!),
              borderSide: BorderSide(
                  color:Colors.white,
                  width: 1
              )
          )

      ),
    );
  }
}

button_widget.dart

class ButtonWidget extends StatelessWidget {
  final Color backgroundcolor;
  final String text;
  final Color textColor;
   ButtonWidget({Key? key,
     required this.backgroundcolor,
     required this.text,
     required this.textColor}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.maxFinite,
      height: MediaQuery.of(context).size.height/14,
      decoration: BoxDecoration(
        color: backgroundcolor,
        borderRadius: BorderRadius.circular(40)
      ),
      child: Center(
        child: Text(text, style: TextStyle(
          fontSize: 24,color: textColor
        ),),
      ),
    );
  }
}

Also have pubspec.yaml

name: flutter_golang_yt
description: A new Flutter project.

# 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 used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.16.1 <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


  # 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: ^1.0.0

# 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.
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:
   - assets/
  #   - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

  # 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: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-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 https://flutter.dev/custom-fonts/#from-packages