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Kickstart Modern Android Development with Jetpack and Kotlin

You're reading from   Kickstart Modern Android Development with Jetpack and Kotlin Enhance your applications by integrating Jetpack and applying modern app architectural concepts

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Product type Paperback
Published in May 2022
Publisher Packt
ISBN-13 9781801811071
Length 472 pages
Edition 1st Edition
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Catalin Ghita Catalin Ghita
Author Profile Icon Catalin Ghita
Catalin Ghita
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Table of Contents (17) Chapters Close

Preface 1. Part 1: Exploring the Core Jetpack Suite and Other Libraries
2. Chapter 1: Creating a Modern UI with Jetpack Compose FREE CHAPTER 3. Chapter 2: Handling UI State with Jetpack ViewModel 4. Chapter 3: Displaying Data from REST APIs with Retrofit 5. Chapter 4: Handling Async Operations with Coroutines 6. Chapter 5: Adding Navigation in Compose With Jetpack Navigation 7. Part 2: A Guide to Clean Application Architecture with Jetpack Libraries
8. Chapter 6: Adding Offline Capabilities with Jetpack Room 9. Chapter 7: Introducing Presentation Patterns in Android 10. Chapter 8: Getting Started with Clean Architecture in Android 11. Chapter 9: Implementing Dependency Injection with Jetpack Hilt 12. Chapter 10: Test Your App with UI and Unit Tests 13. Part 3: Diving into Other Jetpack Libraries
14. Chapter 11: Creating Infinite Lists with Jetpack Paging and Kotlin Flow 15. Chapter 12: Exploring the Jetpack Lifecycle Components 16. Other Books You May Enjoy

Hoisting state in Compose

Composable functions are usually categorized in terms of state handling in two main categories:

  • Stateful, which allows the composable to hold and manage its state. Stateful composables are those functions where the caller (or parent composable) doesn't need to manage the state. They model basic UI interactions such as animations or expanding content, and they are usually okay to be stateful and hold a State object.
  • Stateless, which allows the composable to delegate the state management and to forward event callbacks to its parent composable. Composables that not only impact the UI as their state changes but are also of interest to the presentation or business logic are usually ok to be stateless. This way, the ViewModel component can be the only source of truth for their state to control and manage UI changes but also to avoid illegal states.

In our case, state changes when a restaurant is marked as a favorite or not. Since we want...

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