Dependency injection (DI) is a technique widely used in programming and well suited to Android development. By following the principles of DI, you lay the groundwork for a good app architecture.

Implementing dependency injection provides you with the following advantages:

Reusability of code.
Ease of refactoring.
Ease of testing.

I have always seen Dependency injection (DI) with Dagger2 as the big Elephant in the room, I made a decision to address this elephant once and for all. I found it easier starting off with Dagger Implementation in Java, then Dagger in Kotlin and finally the new google recommended DI for Android Hilt in Kotlin

I found a very useful blog by CodingFlow which gave me a very good lift off, very simple,clear and awesome implementation.

• Dagger 2 in Java CodingFlow Dagger2 Tutorials

After grasping the whole concept of Dagger in Java it was time to jump into my favorite train of Kotlin. For Kotlin google have a very awesome documentation and a codelab. I took the codeLab

• Using Dagger in your Android app - Kotlin

To implement hilt I had two approach,

• Migrating your Dagger app to Hilt
• Using Hilt in your Android app

• Android: Basic app using MVVM, Hilt, Coroutines, Flow, Retrofit, and Coil

• Dagger-Hilt + Retrofit + Coroutines