Introduction to Dagger 2: For Beginners

Hello and Welcome, if you are an Android developer or you have just started learning Android you must have heard of Dagger.No it has nothing to do with 🔪 it's a dependency injection framework for both Java and Android. Now you must be wondering what is dependency injection, dependency injection is a programming technique in which one object supplies the dependencies of another object.

Now a question arises as to why we should use dependency injection in our projects what are the advantages? According to the official documentation di provides us with the following advantages:

• Reusability of code
• Ease of refactoring
• Ease of testing

Whatever we are building a clean architecture will always help us. It will save us from writing long boilerplate codes, again and again, it will help us in testing and many more.

Dagger 2 is a compile-time android dependency injection framework and uses the JSR 330 and uses an annotation processor.

In this article, we will learn how to implement dagger 2 in our android projects.

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First of all, create a new android studio project and add the following dependencies.