How does Dependency Injection work internally in Android SDK?

Dependency Injection (DI) is a design pattern used to implement IoC (Inversion of Control), allowing the creation of dependent objects outside of a class and providing those objects to a class in different ways. In Android, Dependency Injection helps in making code more modular, testable, and manageable.

Internally, the Android SDK utilizes several DI frameworks, such as Dagger, Hilt, or Koin, to facilitate the provisioning of dependencies. The general process of DI in Android involves:

  • Creating interfaces or abstract classes that define the dependencies.
  • Implementing classes that provide the dependencies.
  • Using a DI framework to automatically inject the required dependencies into classes without manual instantiation.

This allows for a clear separation of concerns, where classes focus on their responsibilities without worrying about the instantiation of their dependencies.


Keywords: Dependency Injection Android DI Android SDK Inversion of Control Dagger Hilt Koin Modular Programming Testable Code