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You're reading from  How to Build Android Apps with Kotlin

Product typeBook
Published inFeb 2021
Reading LevelIntermediate
PublisherPackt
ISBN-139781838984113
Edition1st Edition
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Authors (4):
Alex Forrester
Alex Forrester
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Alex Forrester

Alex Forrester is an experienced software developer with more than 20 years of experience in mobile, web development, and content management systems. He has been working with Android for over 8 years, creating flagship apps for blue-chip companies across a broad range of industries at Sky, The Automobile Association, HSBC, The Discovery Channel, and O2. Alex lives in Hertfordshire with his wife and daughter. When he's not developing, he likes rugby and running in the Chiltern hills.
Read more about Alex Forrester

Eran Boudjnah
Eran Boudjnah
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Eran Boudjnah

Eran Boudjnah is a developer with over 20 years of experience in developing desktop applications, websites, interactive attractions, and mobile applications. He has been working with Android for about 7 years, developing apps and leading mobile teams for a wide range of clients, from start-ups (JustEat) to large-scale companies (Sky) and conglomerates. He is passionate about board games (with a modest collection of a few hundred games) and has a Transformers collection he's quite proud of. Eran lives in North London with Lea, his wife.
Read more about Eran Boudjnah

Alexandru Dumbravan
Alexandru Dumbravan
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Alexandru Dumbravan

Alexandru Dumbravan has been an Android Developer since 2011 and worked across a variety of Android applications which contained features such as messaging, voice calls, file management, and location. He continues to broaden his development skills while working in London for a popular fintech company.
Read more about Alexandru Dumbravan

Jomar Tigcal
Jomar Tigcal
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Jomar Tigcal

Jomar Tigcal is an Android developer with over 10 years of experience in mobile and software development. He worked on various stages of app development for small startups to large companies. Jomar has also given talks and conducted training and workshops on Android. In his free time, he likes running and reading. He lives in Vancouver, Canada with his wife Celine.
Read more about Jomar Tigcal

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Coroutines

Coroutines were added in Kotlin 1.3 for managing background tasks such as making network calls and accessing files or databases. Kotlin coroutines are Google's official recommendation for asynchronous programming on Android. Their Jetpack libraries, such as LifeCycle, WorkManager, and Room, now include support for coroutines.

With coroutines, you can write your code in a sequential way. The long-running task can be made into a suspending function, which when called can pause the thread without blocking it. When the suspending function is done, the current thread will resume execution. This will make your code easier to read and debug.

To mark a function as a suspending function, you can add the suspend keyword to it; for example, if you have a function that calls the getMovies function, which fetches movies from your endpoint and then displays it:

val movies = getMovies()
displayMovies(movies) 

You can make the getMovies() function a suspending function...

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How to Build Android Apps with Kotlin
Published in: Feb 2021Publisher: PacktISBN-13: 9781838984113

Authors (4)

author image
Alex Forrester

Alex Forrester is an experienced software developer with more than 20 years of experience in mobile, web development, and content management systems. He has been working with Android for over 8 years, creating flagship apps for blue-chip companies across a broad range of industries at Sky, The Automobile Association, HSBC, The Discovery Channel, and O2. Alex lives in Hertfordshire with his wife and daughter. When he's not developing, he likes rugby and running in the Chiltern hills.
Read more about Alex Forrester

author image
Eran Boudjnah

Eran Boudjnah is a developer with over 20 years of experience in developing desktop applications, websites, interactive attractions, and mobile applications. He has been working with Android for about 7 years, developing apps and leading mobile teams for a wide range of clients, from start-ups (JustEat) to large-scale companies (Sky) and conglomerates. He is passionate about board games (with a modest collection of a few hundred games) and has a Transformers collection he's quite proud of. Eran lives in North London with Lea, his wife.
Read more about Eran Boudjnah

author image
Alexandru Dumbravan

Alexandru Dumbravan has been an Android Developer since 2011 and worked across a variety of Android applications which contained features such as messaging, voice calls, file management, and location. He continues to broaden his development skills while working in London for a popular fintech company.
Read more about Alexandru Dumbravan

author image
Jomar Tigcal

Jomar Tigcal is an Android developer with over 10 years of experience in mobile and software development. He worked on various stages of app development for small startups to large companies. Jomar has also given talks and conducted training and workshops on Android. In his free time, he likes running and reading. He lives in Vancouver, Canada with his wife Celine.
Read more about Jomar Tigcal