How to make singleton for UserSettings?

[mezhevikin]

Hi. Thank you for the library.
I have a question.
How to make singleton for UserSettings?
I'd like to set context in one place and then use UserSettings.shared.

App.kt
UserSettings.init(applicationContext)

MainActivity.kt
UserSettings.shared.property = 2

[zsmb13]

My suggestion would be to create that singleton instance using a dependency injection solution, such as Dagger 2 or Koin.

Otherwise, you can use an object as your Krate, with something like this:

object UserSettings : Krate {

    override lateinit var sharedPreferences: SharedPreferences

    fun init(context: Context) {
        check(!::sharedPreferences.isInitialized)
        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
    }

    var property by stringPref("property")

}

But be aware that this is fairly error-prone, as you'll get exceptions if you use the instance before initializing it. This here is just one implementation of a singleton pattern that takes a parameter in Kotlin, based on your suggested API, you can find more here.