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How to Build Android Apps with Kotlin

You're reading from   How to Build Android Apps with Kotlin A practical guide to developing, testing, and publishing your first Android apps

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Product type Paperback
Published in May 2023
Publisher Packt
ISBN-13 9781837634934
Length 704 pages
Edition 2nd Edition
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Authors (4):
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Alex Forrester Alex Forrester
Author Profile Icon Alex Forrester
Alex Forrester
Jomar Tigcal Jomar Tigcal
Author Profile Icon Jomar Tigcal
Jomar Tigcal
Eran Boudjnah Eran Boudjnah
Author Profile Icon Eran Boudjnah
Eran Boudjnah
Alexandru Dumbravan Alexandru Dumbravan
Author Profile Icon Alexandru Dumbravan
Alexandru Dumbravan
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Toc

Table of Contents (24) Chapters Close

Preface 1. Part 1: Android Foundation
2. Chapter 1: Creating Your First App FREE CHAPTER 3. Chapter 2: Building User Screen Flows 4. Chapter 3: Developing the UI with Fragments 5. Chapter 4: Building App Navigation 6. Part 2: Displaying Network Calls
7. Chapter 5: Essential Libraries: Retrofit, Moshi, and Glide 8. Chapter 6: Adding and Interacting with RecyclerView 9. Chapter 7: Android Permissions and Google Maps 10. Chapter 8: Services, WorkManager, and Notifications 11. Chapter 9: Building User Interfaces Using Jetpack Compose 12. Part 3: Testing and Code Structure
13. Chapter 10: Unit Tests and Integration Tests with JUnit, Mockito, and Espresso 14. Chapter 11: Android Architecture Components 15. Chapter 12: Persisting Data 16. Chapter 13: Dependency Injection with Dagger, Hilt, and Koin 17. Part 4: Polishing and Publishing an App
18. Chapter 14: Coroutines and Flow 19. Chapter 15: Architecture Patterns 20. Chapter 16: Animations and Transitions with CoordinatorLayout and MotionLayout 21. Chapter 17: Launching Your App on Google Play 22. Index 23. Other Books You May Enjoy

Populating RecyclerView

So, we added RecyclerView to our layout. For us to benefit from RecyclerView, we need to add content to it. Let’s see how we go about doing that.

As we mentioned before, to add content to our RecyclerView, we would need to implement an adapter. An adapter binds our data to child views. In simpler terms, this means it tells RecyclerView how to plug data into views designed to present that data.

For example, let’s say we want to present a list of employees.

First, we need to design our UI model. This will be a data object holding all the information needed by our view to present a single employee. Because this is a UI model, one convention is to suffix its name with UiModel:

data class EmployeeUiModel(
    val name: String,
    val biography: String,
    val role: EmployeeRole,
    val gender: Gender,
    val imageUrl: String
)

We will...

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