Making REST calls in Kotlin Android using OKHTTP and Coroutines

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Here a quick Kickstart Tutorial for making REST calls with OkHttp and Kotlin Coroutines in your Android app.

This tutorial will provide step-by-step instructions on:

1. Configuring your app for making REST calls
2. Using OkHttp to make a Get call
3. Launch a Get request from a background thread
4. Use ViewModel and LiveData to update the UI.

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1. Versions used

• Android Studio 4.1.1
• Android API 29
• OkHttp 4.9.0
• view model and livedata 2.2.0
• klaxon 5.0.1

2. Creating a project

First, let’s create a new project using the ‘Basic Activity’ template. In Android Studio, select the ‘File’ menu, ‘New Project’ menu item.

Select ‘Next’.