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Kotlin Programming Cookbook

You're reading from   Kotlin Programming Cookbook Explore more than 100 recipes that show how to build robust mobile and web applications with Kotlin, Spring Boot, and Android

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Product type Paperback
Published in Jan 2018
Publisher
ISBN-13 9781788472142
Length 434 pages
Edition 1st Edition
Languages
Tools
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Authors (2):
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Aanand Shekhar Roy Aanand Shekhar Roy
Author Profile Icon Aanand Shekhar Roy
Aanand Shekhar Roy
Rashi Karanpuria Rashi Karanpuria
Author Profile Icon Rashi Karanpuria
Rashi Karanpuria
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Toc

Table of Contents (21) Chapters Close

Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
1. Installation and Working with Environment FREE CHAPTER 2. Control Flow 3. Classes and Objects 4. Functions 5. Object-Oriented Programming 6. Collections Framework 7. Handling File Operations in Kotlin 8. Anko Commons and Extension Function 9. Anko Layouts 10. Databases and Dependency Injection 11. Networking and Concurrency 12. Lambdas and Delegates 13. Testing 14. Web Services with Kotlin 1. Other Books You May Enjoy Index

Version checking on Android


Android versions are shipped out very frequently. With every latest version of Android, you get new features and new improvements. Though Google tries very hard to provide backward compatibility, they aren't able to do so always. For example, there is no backward compatibility for Material design components; you need to be targeting API levels greater than 21 in order to use them. This requires the developer to check beforehand whether the component is supported on that API level or not to ensure that your app runs smoothly on all levels. We usually do that as follows:

if(Build.VERSION.SDK_INT>Build.VERSION_CODES.JELLY_BEAN){

}

Anko provides helper functions that help us achieve similar things but with easier syntax. In this recipe, we will see how to use it.

Getting ready

I'll be using Android Studio to write code. You also need to include the Anko library by adding these lines to your build.gradle file:

 compile "org.jetbrains.anko:anko:$anko_version"

How to do...

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