Book Image

Kickstart Modern Android Development with Jetpack and Kotlin

By : Catalin Ghita
5 (1)
Book Image

Kickstart Modern Android Development with Jetpack and Kotlin

5 (1)
By: Catalin Ghita

Overview of this book

With Jetpack libraries, you can build and design high-quality, robust Android apps that have an improved architecture and work consistently across different versions and devices. This book will help you understand how Jetpack allows developers to follow best practices and architectural patterns when building Android apps while also eliminating boilerplate code. Developers working with Android and Kotlin will be able to put their knowledge to work with this condensed practical guide to building apps with the most popular Jetpack libraries, including Jetpack Compose, ViewModel, Hilt, Room, Paging, Lifecycle, and Navigation. You'll get to grips with relevant libraries and architectural patterns, including popular libraries in the Android ecosystem such as Retrofit, Coroutines, and Flow while building modern applications with real-world data. By the end of this Android app development book, you'll have learned how to leverage Jetpack libraries and your knowledge of architectural concepts for building, designing, and testing robust Android applications for various use cases.
Table of Contents (17 chapters)
1
Part 1: Exploring the Core Jetpack Suite and Other Libraries
7
Part 2: A Guide to Clean Application Architecture with Jetpack Libraries
13
Part 3: Diving into Other Jetpack Libraries

Chapter 12: Exploring the Jetpack Lifecycle Components

In this chapter, we're adding a countdown timer component to our Repositories app from Chapter 11, Creating Infinite Lists with Jetpack Paging and Kotlin Flow, while also exploring the Jetpack Lifecycle components.

In the first section, Introducing the Jetpack Lifecycle components, we want to explore how the lifecycle events and states are tied to Android components such as Activity or Fragment, and then how predefined components from the Lifecycle package can react to them.

Next, in the Adding a countdown component in the Repositories app section, we will be creating and adding a countdown timer component to the Repositories app. When a 60-second countdown finishes, we will award users with a fictional prize.

However, we will want the countdown to run as long as the timer is visible on the screen; otherwise, users could cheat by minimizing the application and having the countdown run in background. In the Creating...