Null Content Shared Preferences In Kotlin

I'm developing an app that uses Shared Preferences, so I created a class only for this, but when I launch the app I get this error: 2020-06-03 14:51:50.124 32656-32656/com.go.exper

Solution 1:

var prefs = Preferences(this@AccesoActivity)

This is not going to work. Never try to use an Activity object until after super.onCreate(), except in very specific situations.

Switch this to:

lateinitvar prefs: Preferences

and add this to onCreate() after super.onCreate():

prefs = Preferences(this)

Solution 2:

CommonsWare is completely right. You also can use lazy delegate. It adds a little overhead but it's easier to read at least from my point of view

val prefs by lazy { Preferences(this) }