Working with SharedPreferences

SharedPreferences is a persistent way of data storage in Android devices and is mostly used to save data in key-value pairs, such as the settings of an app. Kotlin makes it easier to work with shared preference using its unique language construct. In this recipe, we will see how Kotlin can help us deal with SharedPreferences easily. So let's get started.

Getting ready

We will be using Android Studio 3.0 for this recipe. If you have an older version of Android Studio, either update it to 3.0 or configure Kotlin in it.

How to do it…

To be able to define and use SharedPreferences, we follow particular steps. We will go through each step and implement this together:

1. First, we will create a Prefs class that will act as a single entry to read/write from our app's SharedPreferences. This will make it easier to handle all SharedPreferences since they all will be in one place. As we know, shared preference requires context to be present, so we will pass context in the primary...