What are the advantages and disadvantages of using dependency injection in software?

Dependency Injection (DI) is a pattern where objects receive their dependencies from outside rather than creating them themselves.

Advantages:

• Improves modularity and testability of the code — dependencies can be easily replaced with mocks or stubs.
• Reduces coupling between components, making maintenance and extension easier.
• Allows centralized management of dependency configurations.

Disadvantages:

• Complicates the project structure due to the need to configure a DI container.
• May make the code harder to understand for beginners, as dependencies are not explicitly visible in the constructor.
• In some cases, leads to redundancy and complexity if used unnecessarily.

In Android, DI is often implemented using libraries (Dagger, Hilt), which help manage complex dependencies in applications.