How To Dependency Inject a Kitten: An Introduction to Dagger 2
Download as PPTX, PDF0 likes230 views
The document provides an introduction to Dagger 2, a library for dependency injection in Android applications, detailing its features and the necessity for managing dependencies efficiently. It covers how to set up Dagger 2, including creating modules and components, as well as practical examples with Kotlin and Retrofit. Additionally, it encourages the adoption of cats from the Toronto Cat Rescue, showcasing a community aspect related to the content.
How To Dependency Inject a Kitten: An Introduction to Dagger 2
- 1. Todd Burgess Todd Burgess Media [email protected] Twitter: @tburgess57 Github: toddburgessmedia Introduction to Dagger 2 How to Dependency Inject a Kitten An Introduction to Dagger 2
- 2. Give an object its instance variables James Shore Introduction to Dagger 2 Dependency Injection Definition
- 3. Introduction to Dagger 2 The Tail of 2 Constructors class A { B b; public A () { this.b = new B(); } public A (B b) { this.b = b; } }
- 4. Dagger 2 is a library that manages dependency injection in our Android applications Dagger 2 is maintained by Google and is a fork of Dagger 1 that was done by Square Introduction to Dagger 2 Dagger 2 Introduction
- 5. Introduction to Dagger 2 SharedPreferences Between Activities
- 6. Creates two objects when there only needs to be one Code is duplicated across two activites Introduction to Dagger 2 Problem with Current Example
- 7. Introduction to Dagger 2 Breaking SharedPreferences
- 8. Introduction to Dagger 2 If Only There Was a Way to Solve This
- 9. Introduction to Dagger 2 The Problem and the Desired Solution
- 10. Dagger 2 To the Rescue
- 11. 1)Create Modules to Provide Dependencies 1)Create Component to Link Modules to Activities/Fragments 1)Create Component instance in Application 1)Inject dependencies into Activites/Fragments Introduction to Dagger 2 Dagger 2 in a Nutshell
- 13. //Dagger 2 dependencies compile 'com.google.dagger:dagger:2.11' annotationProcessor 'com.google.dagger:dagger-compiler:2.11' provided 'javax.annotation:jsr250-api:1.0' Introduction to Dagger 2 Step 1 Add Dagger 2 Dependencies to build.gradle
- 16. Create the Application class DemoApplication.java
- 17. Add DemoApplication to AndroidManifest.xml
- 19. @Inject lateinit var prefs : SharePreferences Avoid null checks for dependency injected fields with lateinit Introduction to Dagger 2 Dagger 2 and Kotlin Lateinit for field injection
- 20. Introduction to Dagger 2 How to Dependency Inject a Kitten Toronto Cat Rescue Kitten - Argo
- 21. Library by Square Retrofit queries REST sources and returns the result as POJOs Introduction to Dagger 2 Introduction to Retrofit
- 22. Get All Cats Available for Adoption Using Retrofit
- 23. Get Information About a Kitten
- 24. Introduction to Dagger 2 Using Dagger 2 to Dependency Inject a Kitten
- 25. Dagger 2 allows you the developer to focus more on writing code and instead of maintaining it Dagger 2 can be used to assist with testing and app frameworks (ex. MVP) Introduction to Dagger 2 In Conclusion
- 26. Adopt a Toronto Cat Rescue Cat Alex – 1 Year old, Female
- 27. Dagger 2 https://google.github.io/dagger/ Retrofit https://github.com/square/retrofit Dagger 2 Demo https://github.com/toddburgessmedia/Dagger2Demo Toronto Cat Rescue https://torontocatrescue.ca/ Introduction to Dagger 2 Links