// 1. Get a reference to SharedPreferences a you normally would.
val prefs: SharedPreferences

// 2. Use the extension functions to create a LiveData object of whatever type you need and observe the result.
val boolPrefLiveData = prefs.booleanLiveData("notification_enabled", false)
boolPrefLiveData.observe(this, { enabled ->
    if (enabled != null && enabled) {
      sendAnalytics()
    }
})

// 3. If you want to get the value associated with a particular sharedpref key and you have an object of type LiveDataSharedPreferences.kt,
//    just use the following code :
val boolValue = boolPrefLiveData.value