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Simplifying Android Development with Coroutines and Flows

Simplifying Android Development with Coroutines and Flows

By : Jomar Tigcal
5 (2)
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Simplifying Android Development with Coroutines and Flows

Simplifying Android Development with Coroutines and Flows

5 (2)
By: Jomar Tigcal

Overview of this book

Coroutines and flows are the new recommended way for developers to carry out asynchronous programming in Android using simple, modern, and testable code. This book will teach you how coroutines and flows work and how to use them in building Android applications, along with helping you to develop modern Android applications with asynchronous programming using real data. The book begins by showing you how to create and handle Kotlin coroutines on Android. You’ll explore asynchronous programming in Kotlin, and understand how to test Kotlin coroutines. Next, you'll learn about Kotlin flows on Android, and have a closer look at using Kotlin flows by getting to grips with handling flow cancellations and exceptions and testing the flows. By the end of this book, you'll have the skills you need to build high-quality and maintainable Android applications using coroutines and flows.
Table of Contents (11 chapters)
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1
Part 1 – Kotlin Coroutines on Android
6
Part 2 – Kotlin Flows on Android

Summary

In this chapter, you learned about coroutine cancelations. You can cancel coroutines by using the cancel or cancelAndJoin function from the coroutine job or the cancel function from the coroutine scope.

You learned that a coroutine cancelation needs to be cooperative. You also learned how you can change your code to make your coroutine cancelable by using isActive checks or by using suspending functions from the kotlinx.coroutines package.

Then, you learned about coroutine timeouts. You can set a timeout (in milliseconds or Duration) using withTimeout or withTimeoutOrNull.

You also learned about coroutine exceptions and how to catch them. try-catch blocks can be used to handle exceptions. You can also use CoroutineExceptionHandler in your coroutine scope to catch and handle exceptions in a single location.

Finally, you worked on an exercise to add cancelation to a coroutine and another exercise to update your code to handle coroutine exceptions.

In the next...

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