shared preferences using kotlin delegation

App.kt

val sharedApplicationContext: Context get() = sharedApplicationContextBackingProperty
    ?: throw IllegalStateException(
        "Application context not initialized yet."
    )
private var sharedApplicationContextBackingProperty: Context? = null

class App : Application() {

    override fun onCreate() {
        super.onCreate()

        sharedApplicationContextBackingProperty = applicationContext
    }
}

DefaultSharedPrefs.kt

private const val PREF_NAME = "defaultSharedPrefs"

object DefaultSharedPrefs : SharedPreferences by sharedApplicationContext.getSharedPreferences(
    PREF_NAME, Context.MODE_PRIVATE
)

private const val PREF_CLICK_COUNT = "prefClickCount"

var DefaultSharedPrefs.clickCount: Int
    get() = getInt(PREF_CLICK_COUNT, 0)
    set(value) = edit {
        putInt(PREF_CLICK_COUNT, value)
    }

Use it like this

for get() 
val count = DefaultSharedPrefs.clickCount

for set()
DefaultSharedPrefs.clickCount++
or 
DefaultSharedPrefs.clickCount = 1