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[Vibe Coding] Flutter Practical Level-Up: Step 3 Build Flavors and Environment Switching Without Code Modification

"Are you still modifying your code every time you change the server address?" In professional practice, Development (Dev), Staging, and Production (Prod) environments are strictly separated. However, many developers still manually change variables within a single main.dart file, exposing themselves to the risk of deployment errors. This course covers a 'true professional-grade architecture' that allows you to switch environments instantly just by selecting a build target, without modifying a single line of code.

(5.0) 3 reviews

32 learners

Level Intermediate

Course period Unlimited

Flutter
Flutter
Docker
Docker
dart
dart
n8n
n8n
get-it
get-it
Flutter
Flutter
Docker
Docker
dart
dart
n8n
n8n
get-it
get-it
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What you will gain after the course

  • Independent build and execution capabilities for each environment

  • Advanced Dependency Injection (DI) Applications Using Get_it

  • Creating your own test environment without a server developer

🚀 [Update Complete] [Special] Practical Mastery: Flavor Environment Separation and Firebase Emulator session newly added!

The standard that defines the level of professional Flutter practice,

It is the 'environment separation strategy'

Switch environments using only the build target without modifying a single line of code


Break free from the hassle of modifying code every time and the risk of deployment accidents, and equip yourself with
systematic environment management skills using Build Variants (Flavors) and Get_it.

"If you have built a solid foundation and theory through my lectures so far, now is the time to experience 'the speed of real-world practice.' No long explanations are needed. In 2 hours, your project will be perfectly isolated by environment and ready for deployment with a single click. It's short, but it will be the most efficient lecture in your development career."

Choose 70 minutes of core practical skills instead of tedious theory.

Instead of a long-winded lecture, you will master just one technique: the '3-stage build separation' that can be applied immediately in the field.

From how to use Flutter, get-it, n8n, and Docker
to independent builds for each environment and DI applications, we cover the core essentials of practical work.


10-second coding with AI (Antigravity)

As long as there is a specification, code typing is minimized through Antigravity AI.

We will design the entire process of instantly switching between development, verification, and production environments without modifying a single line of code,
and even building your own test server.


A 'server-independent' development environment using n8n and No-code

Even waiting for a backend developer is a waste of time. We introduce the tools of a 'complete developer' who builds and validates their own staging servers by combining n8n and AI.

Complete your environment configuration using pure Dart alone, and round out your practical development experience by executing the terminal directly in VS Code.

Experience the magic of environment switching
without a single line of code

Section 1 - Basic Understanding of Build Variants

Understand the necessity of environment-specific build configurations encountered in Flutter practice. Learn how to separate development, staging, and production environments without code modifications, and discover how to configure build environments using only Dart without native settings.


Section 2 - Building a Development Environment Using a Mock Environment

Build an independent development environment quickly using mock data. Practice how to effectively connect state management and UI using dependency injection (DI) libraries such as GetIt.


Section 3 - Building an n8n-based Test (Staging) Server

Understand the role of a staging server and build your own test environment using n8n and Docker. Learn how to integrate APIs on the staging server using Webhook nodes.


Section 4 - Environment Switching Techniques Without Code Changes

Set up the necessary DI configuration for the staging environment and run the app. Learn how to execute the app for each build environment via the terminal to master environment switching for final checks before actual deployment.


Section 5 - Final Environment Configuration for Production Deployment

Complete the execution settings for each build environment in VS Code and perform the final check for production deployment.



Are you still manually changing main.dart?
This course was created specifically for people like you.


✔️ Developers who have broken into a cold sweat after forgetting to change the server address before deployment

  • Those who want to escape the risk of deployment accidents caused by manually changing variables in main.dart

  • Those who want to build a stable deployment process with the ability to build and run independently for each environment

  • Those who want to experience a practical architecture that allows for immediate environment switching simply by selecting a build target, without any further code modifications.

✔️ Those who are curious about practical applications of Dependency Injection (DI) using Get_it

  • Those who want to learn advanced dependency injection (DI) application methods using the Get_it library

  • Those who want to learn how to increase code reusability and testability through DI

  • Those who want to develop the ability to write flexible and scalable code even in complex app structures

✔️ Those who want to build a mock server using AI and no-code tools without a server developer

  • Those who want to quickly build their own test environment without the help of a server developer

  • Those who want to learn how to build and automate their own staging server using n8n and Docker

  • Those who want to experience an efficient testing process using mock data and actual staging server data


Experience the magic of switching build environments freely without modifying a single line of code.
It will be the best choice for stable deployment and efficient development.

Notes before taking the course


Practice Environment

  • Operating System: macOS, Windows, and Linux are all supported.

  • Required installation tools: Flutter SDK, Dart SDK, Android Studio or VS Code.

  • Recommended Specifications: 8GB RAM or more and 50GB of available SSD storage are recommended.

Prerequisites and Important Notes

  • This course is for those with Flutter development experience.

  • It is recommended for those who have watched "Flutter Intermediate Part 1: Clean Architecture" or possess related knowledge.



Roadmap


Recommended for
these people

Who is this course right for?

  • Developers who have broken into a "cold sweat" after forgetting to change the server address before deployment

  • Developers who understand the concept of Dependency Injection (DI) but are eager for practical application.

  • A developer who experiences long, meaningless wait times while testing server API integration.

Need to know before starting?

  • Basic knowledge of Flutter and Dart

  • Experience using the Get_it package

Hello
This is survivalcoding

12,341

Learners

888

Reviews

864

Answers

4.7

Rating

15

Courses

I am Junseok Oh, a developer who teaches and writes books.
I run the 'Junseok Oh's Survival Coding' YouTube channel and the Survival Coding (https://survivalcoding.com) educational platform.

Specialties: Android, Flutter

Books
Oh Jun-seok's Flutter Survival Coding (Hanbit Media 2020)
Oh Jun-seok's Android Survival Coding: Kotlin Edition (Hanbit Media 2018)
Android Until It Works (Ruby Paper 2018)

Key Experience
CEO of OhRange
IT Development Vocational Training Instructor at Semin Vocational Training School
Director of Suwon Smart App Development Academy
LG Electronics MC Division
Security Division, Tokai Rika Co., Ltd., Aichi Prefecture, Japan
IT Division, Nihon Techseed Co., Ltd., Aichi Prefecture, Japan

LinkedIn: https://www.linkedin.com/in/junsuk5/

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Curriculum

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26 lectures ∙ (3hr 3min)

Published: 
Last updated: 

Reviews

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3 reviews

5.0

3 reviews

  • songjin39148713님의 프로필 이미지
    songjin39148713

    Reviews 20

    Average Rating 5.0

    Edited

    5

    100% enrolled

    It was a short but substantial lecture on separating development environments, which was great for quickly learning the core concepts. Additionally, it was good to see how to structure and rapidly build apps through this Antigravity approach.

    • savetheaspirin6157님의 프로필 이미지
      savetheaspirin6157

      Reviews 1

      Average Rating 5.0

      5

      100% enrolled

      • wogks274388님의 프로필 이미지
        wogks274388

        Reviews 12

        Average Rating 4.6

        5

        83% enrolled

        Things you must know before or after joining a company, I had always been curious about development environment separation, and this completely cleared it up for me. I was able to use MCP, which I had always been curious about, without any burden, and what was even better was being able to approach various new tools I learned about without hesitation.

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