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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
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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 (16) Chapters Close

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 15. Other Books You May Enjoy

How to download a file in Kotlin

We often need to download files in our Android application. The most basic way of doing this will be opening a URL connection and using InputStream to read the content of the file and storing it in a local file using FileOutputStream; all this is in a background thread using AsyncTask. However, we don’t want to reinvent the wheel. There are a lot of libraries out there that handle all this stuff very nicely for us and make our work super easy, helping us create clean code.

We can use Volley (https://developer.android.com/training/volley/index.html), a networking library by developers at Google, which makes network communication very easy and fast. Another one we can use is OkHttp (by Square), which is very efficient, and we can use it along with Retrofit (for HTTP API).

For this recipe, we will be using a networking library called Fuel...

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