Clean Architecture: The Key to Modular and Testable Android Apps

What is a Clean Architecture?

Imagine you’re building a house. In Clean Architecture, your codebase is like that house. It’s organized in distinct layers, each with its own purpose and responsibilities. Just like a house has an outer shell, rooms, and inner workings, Clean Architecture has layers: Presentation (UI), Domain (business logic), and Data (storage and external services). The key idea is to keep these layers independent so that changes in one layer don’t affect others.

What is MVVM in Android with example?

MVVM stands for Model-View-ViewModel, and it’s a design pattern used in software development, particularly in the context of building user interfaces for applications, including Android apps. MVVM is designed to help separate the concerns of an application’s UI, business logic, and data manipulation, making the codebase more modular, maintainable, and testable.

Imagine you’re making a to-do list app. The Model represents your tasks, the View is the UI displaying those tasks, and the ViewModel manages the data and interactions. So, when you check off a task in the UI, the ViewModel updates the Model, and the UI automatically reflects the change. This separation makes your code more maintainable and…