Understanding the Liskov Substitution Principle in Kotlin Android with Jetpack Compose

Introduction

The Liskov Substitution Principle (LSP) is the third principle in the SOLID design principles of object-oriented programming. It was introduced by Barbara Liskov in 1987 and says that objects of a superclass should be replaceable with objects of its subclass without breaking the program. In simple terms, any class that inherits from another should work in the same way, without causing unexpected behavior.

The SOLID Foundation

LSP is one of the five principles in the SOLID acronym:

• S: Single Responsibility Principle
• O: Open/Closed Principle
• L: Liskov Substitution Principle
• I: Interface Segregation Principle
• D: Dependency Inversion Principle

Each principle focuses on writing better, cleaner, and more flexible code. In this article, we’ll focus specifically on the Liskov Substitution Principle.

Understanding the Liskov Substitution Principle

At its core, LSP means that a subclass should be able to replace its parent class without changing how the program behaves. To follow this…