Open In App

What is Clean Architecture in Android?

Last Updated : 19 Feb, 2022
Improve
Improve
Like Article
Like
Save
Share
Report

With the growing period of technology, it is critical to get the architecture right if you want to build a fantastic software program, which is why it’s so essential. If you’re interested in creating android apps with the help of clean architecture, then you have arrived at the right place. Here, we aren’t just providing you the MVVM (Model View-View model) tutorial, but we will be using MVVM for connecting it through a Clean Architecture. This article will look at how to leverage this design to create decoupled, tested, and maintainable code. Before we jump into our main discussion, let’s understand MVVM first.

MVVM

The Model-View-ViewModel (MVVM) is a software design framework that separates program logic from user interface controls. It was introduced by two well-known Microsoft architects Ken Cooper, and John Gossman, in 2005. Besides, MVVM is also known as a model-view-binder. Like many other design patterns, MVVM aids in the organization of code and the separation of programs into modules, making code development, update, and reuse easier and faster. The design is often used in Windows and web graphics presentation software. The Windows Presentation Foundation (WPF) runs on Microsoft’s .NET platform, employs the MVVM design. MVVM is also used by Silverlight, a Microsoft WPF internet comparable multimedia plug-in.  

Clean Architecture  in Android

Clean architecture is a method of software development in which you should be able to identify what a program performs merely by looking at its source code. The programming language, hardware, and software libraries needed to achieve the program’s goal should be rendered obsolete. Like other software design philosophies, Clean architecture aims to provide a cost-effective process for developing quality code that performs better, is easier to alter, and has fewer dependencies. Robert C. Martin established clean architecture and promoted it on his blog, Uncle Bob, in 2011.

Well, you must be wondering Why Architecture is essential? Let’s dig inside. The purpose of all architectures is to manage the complexity of your application. On a minor project, you may not need to worry about it, but it can be a lifesaver on larger ones. I believe you may have already seen this picture.

Clean-Architecture-in-Android

The above rings represent diverse levels of software in your app. Before we move ahead, there are two crucial points to keep in mind:

  1. The most abstract circle is in the center, while the most concrete ring is on the outside. The Abstraction Principle is what this is referred to as. According to the Abstraction Principle, inner circles should include business logic, whereas outer rings should contain implementation details.
  2. The Dependency Rule is another Clean Architecture principle. This rule states that each circle can only rely on the inner circle closest to it, allowing the architecture to function.

Perhaps, now is the time to understand Why MVVM with a Clean Architecture?

MVVM with Clean Architecture

Your view, i.e. (Activity and Fragments), is separated from your business logic using MVVM. For small projects, MVVM is sufficient, but as your codebase grows more extensive, your ViewModels begin to bloat. It becomes challenging to separate responsibilities. In such instances, MVVM with Clean Architecture is a suitable choice. It goes a step further in segregating your code base’s responsibilities. The logic of the actions that can be performed in your app is abstracted. Now, Clean Architecture can also be combined with the Model-View-Presenter (MVP) architecture. So, we’re going with MVVM over MVP because Android Architecture Components already has a built-in ViewModel class—no MVVM framework necessary!

Before we move ahead, you need to be clear that using Clean Architecture can have its Advantages & Disadvantages. Let’s check it out one by one.

Advantage of Clean Architecture

  • Code is easy to test than with standard MVVM.
  • Perfectly curated separation (the most considerable advantage).
  • User-friendly package structure.
  • Easy to keep the project running.
  • Your team will be able to implement new features even faster.

Disadvantages of Clean Architecture

  • The learning curve is a little steep. It may take some time to learn how all levels interact, especially if you’re coming from architectures like simple MVVM or MVP.
  • It contains many extra classes, so it’s not suitable for applications with a low level of sophistication.

Now, let’s check out the Layers involved in this process.

Combining MVVM with Clean Architecture

Below, we’re showing you the graph representation of MVVM with Clean Architecture.

Point to Remember:

  • Only the outer layers may rely on the inner layers for communication.
  • The amount of layers is entirely up to you: Make it fit your requirements.
  • In intimate circles, things grow more abstract.

Layers of MVVM  

There are differing viewpoints on the number of levels that Clean Architecture should have. The design does not specify separate layers but instead lays the groundwork. The concept is that you adjust the number of layers according to your need. Here, to keep it short, we will use five, have a look at them.

  • Presentation: This is a layer that interacts with the (UI)user interface.
  • Domain: The app’s business logic is stored here.
  • Use cases: Interactors are another name for them.
  • Data: All data sources are defined in a broad sense.
  • Framework: Implements interface with the Android SDK as well as concrete data layer implementations.

When to use Clean Architecture?

It’s crucial to remember that clean architecture isn’t a remedy but can be applied to any platform. Based on the project, you should determine if it meets your requirements. If your project is large and sophisticated, with a lot of business logic, for example, Clean architecture has many advantages. However, for smaller and simpler tasks, the benefits may not be worth it — you’ll end up writing more code and increasing complexity with all the layers, as well as investing more time.


Similar Reads

What is a Clean Frontend Architecture?
In recent years, front-end development has taken a massive leap. The rise of frameworks and libraries has transformed the way developers approach problems and create exquisite user experiences. All this makes it essential to write good code in order to make the application more modular, scalable, and testable. This can be achieved by implementing t
12 min read
Different Ways to fix "Execution failed for task ':app:clean'. Unable to delete file" error in Android Studio
When you try to rebuild or clean and build your project (containing mostly Kotlin code) in Android Studio, it fails and throws the error: Execution failed for task ':app:clean'. Unable to delete file: SpecificFileLocation So, In this article, we are going to see the topics: why there is a need to solve this error and how to solve this error. We wil
3 min read
Best Practices to Write Clean Python Code
Python is one of the most loved programming languages today. Shockingly, Python has overtaken Java in the list of top programming languages and is now the most studied language! It is the second most used language after JavaScript and is slowly beating the competition to be on the top. It is used extensively across various domains like web developm
6 min read
7 Clean Coding Practices Developers Should Follow
Developers have this tendency to write efficient code but sometimes they lack clean coding practice. A good developer is one who writes code that is understandable by machines but the best developer writes code that is understandable by other developers. The code written should look good, clear, and understandable. [caption width="800"] [/caption]
5 min read
7 Tips To Write Clean And Better Code in 2024
Software engineering is not just all about learning a language and building some software. As a software engineer or software developer, you are expected to write good software. So the question is what makes good software? Good software can be judged by reading some pieces of code written in the project. If the code is easy to understand and easy t
11 min read
Android Architecture Patterns
When developers work on a real mobile application whose nature is dynamic and will expand its features according to the user's need, then it is not possible to write core logic in activities or fragments. To structure the project's code and to give it a modular design(separated code parts), architecture patterns are applied to separate the concerns
5 min read
Android System Architecture
The Android software stack generally consists of a Linux kernel and a collection of C/C++ libraries that are exposed through an application framework that provides services, and management of the applications and run time. Linux KernelAndroid was created on the open-source kernel of Linux. One main reason for choosing this kernel was that it provid
3 min read
Difference Between MVC, MVP and MVVM Architecture Pattern in Android
Developing an android application by applying a software architecture pattern is always preferred by the developers. An architecture pattern gives modularity to the project files and assures that all the codes get covered in Unit testing. It makes the task easy for developers to maintain the software and to expand the features of the application in
6 min read
MVC (Model View Controller) Architecture Pattern in Android with Example
Developing an android application by applying a software architecture pattern is always preferred by the developers. An architecture pattern gives modularity to the project files and assures that all the codes get covered in Unit testing. It makes the task easy for developers to maintain the software and to expand the features of the application in
8 min read
MVP (Model View Presenter) Architecture Pattern in Android with Example
In the initial stages of Android development, learners do write codes in such a manner that eventually creates a MainActivity class which contains all the implementation logic(real-world business logic) of the application. This approach of app development leads to Android activity gets closely coupled to both UI and the application data processing
12 min read
Article Tags :