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Simplifying Android Development with Coroutines and Flows

You're reading from   Simplifying Android Development with Coroutines and Flows Learn how to use Kotlin coroutines and the flow API to handle data streams asynchronously in your Android app

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Product type Paperback
Published in Jul 2022
Publisher Packt
ISBN-13 9781801816243
Length 164 pages
Edition 1st Edition
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Jomar Tigcal Jomar Tigcal
Author Profile Icon Jomar Tigcal
Jomar Tigcal
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Table of Contents (11) Chapters Close

Preface 1. Part 1 – Kotlin Coroutines on Android
2. Chapter 1: Introduction to Asynchronous Programming in Android FREE CHAPTER 3. Chapter 2: Understanding Kotlin Coroutines 4. Chapter 3: Handling Coroutine Cancelations and Exceptions 5. Chapter 4: Testing Kotlin Coroutines 6. Part 2 – Kotlin Flows on Android
7. Chapter 5: Using Kotlin Flows 8. Chapter 6: Handling Flow Cancelations and Exceptions 9. Chapter 7: Testing Kotlin Flows 10. Other Books You May Enjoy

Managing coroutine timeouts

In this section, you will learn about timeouts and how you can cancel your coroutines with a timeout. Setting a fixed amount of time after which to stop asynchronous code that is running longer than expected can help you save resources and immediately notify users of any issues.

When your application is doing a background task, you may want to stop it because it is taking too long. You can manually track the time and cancel the task. Or you can use the withTimeout suspending function. With the withTimeout function, you can set your timeout in milliseconds or Duration. Once this timeout is exceeded, it will throw TimeOutCancellationException, a subclass of CancellationException. Here’s an example of how you can use withTimeout:

class MovieViewModel: ViewModel() {
    init {
        viewModelScope.launch {
            ...
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