Explore Clean Architecture In Flutter

Shaiq khan
Jun 24 · 7 min read
Explore Clean Architecture In Flutter

Clean architecture has been around for quite a while yet similarly as with all ‘best practice’ it’s get deciphered from numerous points of view as there are software engineers. At its heart, Clean Architecture is an intricacy and change the management way to deal with getting sorted out code.

In this blog, we will be Explore Clean Architecture In Flutter. We will share a little about clean architecture in the flutter. I will talk in general about the concepts and how it works in your applications.

Table Of Contents ::

Why Should Do We Need It?


The Basics Concept Of Clean Architecture


How Does This Help?


Why Should Do We Need It?:

On the off chance that you’ve been associated with programming in a business climate, it’s ensured you’ve seen a task start well and show a guarantee toward it. Possibly the code was composed well, the group applied unit testing, ran a tight agile ship, drove necessities through BDD, utilizing the very most current innovation, and inclined toward confided in wellsprings of figuring out how to “expertise up”.Or perhaps somebody has made a side venture that just ‘works’ and ought to be not difficult to stick underway.

Then, at that point possibly a couple of months in, or even weeks, the code begins to get somewhat abnormal. By one way or another making changes to the code gets increasingly hard. Merges get increasingly off-kilter and the capacity to remain Agile or Pivot to the client necessities begins to separate.

We’ve all seen it, and it happens each day in the product business. The causes can be complicated and complex however without a doubt the root cause is an absence of spotlight on architecture.


Numerous types of architecture follow similar standards of layering. Isolating your code into a type of coordinated example of layers permits you to exchange those layers when required. Layering permits you to push innovation choices and execution subtleties out to the fringe of your application where they can be changed, modified or added depending on the situation without breaking your business rationale.

The fact of the matter is that picking one architecture and adhering to it’s anything but a vital component of staying away from specialized obligation or possibly having the option to address it as it develops. It ought to be clear at this point we will go over Clean Architecture, however, this article isn’t to say it’s awesome that others aren’t legitimate.

We will see how picking an architecture and folding your picked innovation over it allows you to convey quicker, with fewer headaches, and stay hyper-agile to client needs.

The Basics Concept Of Clean Architecture:

Clean Architecture was instituted by Robert Martin, broadly called ‘UncleBob’. Bob has various crucial books on coding throughout the long term, yet he is most popular for his considerations on ‘Clean’ code.

=> Entities layer

The items that are at the center of your business logic. Think Users, Locations, Books, and so forth. The fundamentals of OOP

The fundamental domain logic that your substances should follow. A User should have a name, a Location should have scope and longitude, and so forth

=> Use Case layer

The application logic of the framework. The Use Cases are the manners by which outside layers can utilize and interface with the entities

Add a user to the framework

Update a user’s location

Search for books of a similar type

This layer likewise contains the interface definitions for the repositories that will store the substances. The Use Cases acknowledge substantial executions of the interfaces, yet the executions DO NOT get made in this layer

=> Controllers/Presenters/Gateways layer: It is answerable for taking information and guidelines that are appropriate for the external layers and changing them over to those reasons for the Use Case layer. Basically planning between the outer layers and the Use Cases

=> Outer layer

These are the execution details of your application

Repository executions to work with your picked database innovation

The User Interface

Connections to other APIs and frameworks


The key thing that makes this design (and others like it) so incredible toward conditions. Layers can just reference and work with different objects inside their own layer or lie inwards of their layer. This is a critical idea to comprehend as it drives every one of the advantages of decoupling and viability.

How about we draw an image! We will introduce a Clean way to deal with utilizing Google’s Flutter and Firebase stack. As we’ve referenced the advances don’t make any difference, you need to twist the innovations to your will and wrap them over a reasonable design!

Taking a genuinely clear task of joining users, logging them in, and allowing them to refresh their profile we can part the code across our Clean Architecture.

=> Entities: Straight forward User object, suppose there is some area logic in there which says the User should have a valid email address

=> Use Cases

Repository interfaces for Create, Retrieve and Update of Users

Use Cases containing the application logic

Signing up a New User

Logging in a new User

Retrieving a User Account

Updating a User’s details

These Use Cases have substantial repositories infused into their constructors meaning they only reference the repository interfaces

=> Interface adapters

For this situation, we are utilizing BLoCs to be the parts that take the UI directions and information then, at that point convert them into Use Case activities

We’ve got a BLoC per UI ‘Page’ of Login and User Profile

=> Infrastructure

Contains the UI execution, in this model Flutter

Contains the Repository execution, here we are using Firebase

Objects in this layer do the Dependency Injection

How Does This Help?:

In case you’re still with me this far you likely could be thinking “wow that is a great deal of moving parts to just store an email in a DB” and you would be correct. All things considered, there are a few profound advantages to this methodology.

This methodology prepares in SOLID coding

  • Single Responsibility: It is advanced by making little lumps spread across the layers
  • Open-Close principle: It is advanced by keeping our business and application logic in our application. The nearer to the middle the components are the more outlandish they are to change and accordingly less open for adjustment
  • Liskov Substitution principle: It is advanced by having our interfaces characterized inside the area layers and the executions are made outside and infused inwards. This permits us to change the vault type utilized (Firebase to SQL for instance. There are more interfaces included regularly permitting further testing)
  • Dependency Inversion Principle: It sticks to layers can just allude to layers on a similar level or inwards of themselves. For instance, the Use Cases have the repository executions infused into them from the framework layer


In the article, I have explained the basic structure of the Clean Architecture In Flutter; you can modify this code according to your choice. This was a small introduction to Clean Architecture In Flutter On User Interaction from my side, and it’s working using Flutter.

I hope this blog will provide you with sufficient information on Trying up the Clean Architecture In Flutter in your projects. We will show you why should do we need it?. You have just learned the basic concept of clean architecture in your flutter applications. So please try it.

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Shaiq khan

Written by

Flutter Developer ll Blogger ll Content Writer😎


FlutterDevs intent to deliver Flutter apps with high quality. We’ve adopted Design First attitude which helps us deliver applications of highest quality.