【ChatGPT x Flutter】Build A Countdown Timer App In 3 Min
Table of Contents
If you are looking for a way to build a mobile app quickly and easily, then ChatGPT and Flutter is the perfect solution for you. ChatGPT is a powerful chatbot platform. Flutter is a cross-platform mobile development framework that allows you to develop iOS and Android apps from a single codebase. Together, these two platforms provide everything you need to build a high-quality mobile app within minutes.
In this article, we will show you how to use ChatGPT and Flutter to build a mobile countdown timer app within minutes. We will cover the following topics:
- Introduction to ChatGPT and Flutter
- Benefits of using ChatGPT and Flutter to Build Apps
- Steps to Create a Mobile App with ChatGPT and Flutter
With ChatGPT and Flutter, you can easily build a mobile app that supports both text and voice interactions. You can also customize your app to support any language or dialect, making it truly global in reach. So let’s get started!
Benefits of using ChatGPT and Flutter to Build Apps #
Flutter is a cross-platform framework that allows you to build native-looking Android and iOS apps & Web apps with a single codebase.
Flutter’s hot reload feature allows you to make changes to your code and see the results instantly, without having to restart your app or recompile your code. This makes development faster and easier.
Flutter is easy to customize and variety of beautiful libraries
Flutter & ChatGPT can boost your creativity & efficiency amazingly as you can build a mobile app within a couple of minutes.
Steps to Create a Mobile App with ChatGPT and Flutter #
So now let’s deep dive into the secret of mobile app development with ChatGPT & Flutter. This time, I will create a countdown timer app with Flutter & ChatGPT.
Let me reveal the way how to build a countdown timer app one by one.
Also, this time I used Merlin to use ChatGPT (GPT-4).
If you want to know more details about Merlin, please check my another post here:)
Build A Mobile App With ChatGPT & Flutter Step 1 : Prompt ChatGPT To Generate Your Code #
First of all, you need to think about how to prompt to ChatGPT. If you prompt ChatGPT inappropriately, you can’t get the result as you expect.
Let me share my prompt when I created the countdown timer. If you want to create the exactly same as my app, you can just copy & paste my prompt to ChatGPT:)
Then, ChatGPT answered me back with the detailed source code here.
I've generated a sample Flutter code for a 60-minute countdown timer using the provided background color and implemented the Start, Pause, and Reset buttons. Remember to add the necessary dependencies in your `pubspec.yaml` and import the necessary packages at the beginning of the dart file.This is just a sample code and you may need to adjust it accordingly.
import 'dart:async';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
backgroundColor: Color(0xFFaee2ff),
body: TimerPage(),
),
);
}
}
class TimerPage extends StatefulWidget {
@override
_TimerPageState createState() => _TimerPageState();
}
class _TimerPageState extends State<TimerPage> {
int _timeRemaining = 3600;
bool _isRunning = false;
Timer? _timer;
String getFormattedTime(int time) {
final int minutes = time ~/ 60;
final int seconds = time % 60;
return '${minutes.toString().padLeft(2, '0')}:${seconds.toString().padLeft(2, '0')}';
}
void startTimer() {
setState(() {
_isRunning = true;
});
_timer = Timer.periodic(Duration(seconds: 1), (timer) {
if (_timeRemaining > 0) {
setState(() {
_timeRemaining--;
});
} else {
timer.cancel();
}
});
}
void pauseTimer() {
setState(() {
_isRunning = false;
});
_timer?.cancel();
}
void resetTimer() {
setState(() {
_timeRemaining = 3600;
_isRunning = false;
});
_timer?.cancel();
}
@override
Widget build(BuildContext context) {
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
getFormattedTime(_timeRemaining),
textAlign: TextAlign.center,
style: TextStyle(fontSize: 48, fontWeight: FontWeight.bold),
),
SizedBox(height: 20),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
ElevatedButton(
onPressed: _isRunning ? null : startTimer,
child: Text('Start'),
),
SizedBox(width: 20),
ElevatedButton(
onPressed: _isRunning ? pauseTimer : null,
child: Text('Pause'),
),
SizedBox(width: 20),
ElevatedButton(
onPressed: resetTimer,
child: Text('Reset'),
),
],
),
],
),
);
}
}
Build A Mobile App With ChatGPT & Flutter Step 2 : Create New Project By Flutter #
After generating flutter source code by ChatGPT, you need to create new flutter project. You can create your flutter project by this command on your terminal.
flutter create project_name
You can overwrite the project_name part by your original project name. After a few sec, you will see the project folder generated on your Desktop.
Build A Mobile App With ChatGPT & Flutter Step 3 : Replace Default Code With ChatGPT’s Code #
All you have to do is just replace the default code with ChatGPT’s code. Open lib/main.dart and replace the original code. Here is the complete source code.
import 'dart:async';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
backgroundColor: Color(0xFFaee2ff),
body: TimerPage(),
),
);
}
}
class TimerPage extends StatefulWidget {
@override
_TimerPageState createState() => _TimerPageState();
}
class _TimerPageState extends State<TimerPage> {
int _timeRemaining = 3600;
bool _isRunning = false;
Timer? _timer;
String getFormattedTime(int time) {
final int minutes = time ~/ 60;
final int seconds = time % 60;
return '${minutes.toString().padLeft(2, '0')}:${seconds.toString().padLeft(2, '0')}';
}
void startTimer() {
setState(() {
_isRunning = true;
});
_timer = Timer.periodic(Duration(seconds: 1), (timer) {
if (_timeRemaining > 0) {
setState(() {
_timeRemaining--;
});
} else {
timer.cancel();
}
});
}
void pauseTimer() {
setState(() {
_isRunning = false;
});
_timer?.cancel();
}
void resetTimer() {
setState(() {
_timeRemaining = 3600;
_isRunning = false;
});
_timer?.cancel();
}
@override
Widget build(BuildContext context) {
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
getFormattedTime(_timeRemaining),
textAlign: TextAlign.center,
style: TextStyle(fontSize: 48, fontWeight: FontWeight.bold),
),
SizedBox(height: 20),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
ElevatedButton(
onPressed: _isRunning ? null : startTimer,
child: Text('Start'),
),
SizedBox(width: 20),
ElevatedButton(
onPressed: _isRunning ? pauseTimer : null,
child: Text('Pause'),
),
SizedBox(width: 20),
ElevatedButton(
onPressed: resetTimer,
child: Text('Reset'),
),
],
),
],
),
);
}
}
Build A Mobile App With ChatGPT & Flutter Step 4 : Run The Application #
Now that’s all! All you have to do is just hit the Run your app.
If you want to run the app from terminal, just run this command on your terminal.
flutter run
Conclusion #
Building a mobile app has never been easier - with ChatGPT and Flutter, you can quickly create an amazing mobile application within minutes. With their intuitive tools, sophisticated features, and powerful UI components, you will be able to create an app that looks professional without having any coding experience. So why not give it a try? Start building your own mobile app today and see how easy it can be!
About me #
I hope this post is informative to you:) For someone who doesn’t know me, here is the summary about me:)
- I started my IT career without any CS background
- I have a couple of years of working experiences as software developer (mainly mobile & web) in Japan
- I got tired of the life in Japan and moved to Vietnam, Da Nang
- I love to create the mobile apps, Youtube videos and share the life in Vietnam
- I hope I can create the space to connect devs all over the world:)
For more details, I am waiting for you on my Youtube channels:)