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Dagger2 Dependency Injection for Android Developers (Udemy.com)

Learn the basic and advanced feature of Dependency Injection with Dagger2, and update your Android development skills

Created by: Catalin Stefan

Last updated February 2026

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What you will learn

  • Dagger2
  • Dependency injection
  • Understand the architectural importance of DI
  • Understand the DI pattern
  • Learn how to use Dagger2 in an application
  • Build an example project using DI

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Overall Score : 90 / 100

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Course Description

Dependency Injection is now an indispensable component of Android development. All well built, large projects use it to make development easier and more practical.

Dagger2 is the most widely used framework for DI in Android.

This course will

  • take you from a complete beginner in the technology

  • explain in detail the theoretical aspects of Dagger 2 injection

  • exhaustively go through all the components that make Dagger2 such a successful library

  • implement it in a practical application, to show you a real world scenario

After this course you will have the knowledge and experience to use Dagger2 in all your app development projects, and will allow your apps to grow and expand seamlessly.

We will learn about:

  • Dagger history and advantages

  • Component

  • Module

  • Annotations

  • Constructor injection

  • Field injection

  • Method injection

  • Singleton pattern

  • Custom components

  • Subcomponents

  • Component factory

  • Practical work

We will build everything in Kotlin.

We cover a lot of ground in this course, and we will implement the concepts practically so that you get not only theoretical knowledge but practical experience as well.

Sign up today, and let's learn how to use Dagger2 to build a modern Android Application.

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Instructor Details

Catalin Stefan

I am an avid learner and teaching enthusiast. I love creating videos and courses that enrich people's lives and help them have a better experience, both personally and professionally. 

I am an expert mobile application developer with over 10 years development experience. I enjoy making courses related to AI, software development and mobile apps, and want to share the knowledge I have acquired.

I create courses based on my professional experience. I hope to teach people skills that help them in their careers, allow them to acquire new skills and improve their personal relationships.

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Reviews

4.5

166 ratings on Udemy

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By Sugumaran Velumurugan on 11/26/2025

Good explanation about the trainings. It explains clearly what I learned in this training.

By Vladimir on 5/29/2025

Dagger2 and Hilt were very difficult topics for me to master and understand, until I found the courses of this teacher. Very simply, as clearly as possible, with a lot of examples, the author explains complex topics so that they become simple. Thanks to the teacher for his hard work!

By Shweta Malik on 6/18/2023

This course is really easy to understand and explained every detail about the topic.

By Carlos Santes on 6/1/2023

This curse is a copy of the free course on Youtube of Dagger 2 Tutorial for coding in flow, I'm genuinely disappointed.

By Kevin Alexander Córdova Santos on 10/7/2022

Very well, in special your speak is very simple to understand I recommend to all person that requiring Dependency injection since zero.

By Masaru Iida on 9/19/2021

Dagger is one of the most powerful frameworks in large Android projects. But it is also hard to learn. After taking this course you will be confident to put Dagger into your project.

By Harun Karaca on 9/7/2021

Big thanks to Stefan, He teach step by step with telling details. I really like her course. Maybe this course needs more section like "Practice app". Thanks

By Manuel Montañés Pérez on 5/6/2021

The course is in general good: clear content most of times, good examples, slides for each lesson, the video quality is high... I have two complains: sometimes, he makes asumptions and he doesn't explain why; he doesn't answer questions from me or from another student. I guess he doesn't answers in any of his courses. I understand that he has more things to do, but I think he should answer. It is a pitty because I would give five stars to this course if he would answer the questions.

By Chandrakanth on 2/7/2021

The way you explained is awesome. Now I got a good idea of how to use the dagger in my android application. Add the source code in Resources so that it will be helpful for any new learners. Please extend this course to explain about "dagger-android" module/lib

By Gerardo Ruiz on 1/13/2021

It's a good course, well explained and clearly understood, but I found the same example of the car on YouTube only as in Java.

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