SharedPreferencesUsage.kt

// init SharedPreferences
 companion object {
        private const val NAME_KEY = "NAME_KEY"
}
private val preferences = activity.getSharedPreferences("pref_name", Context.MODE_PRIVATE)
private val editor = preferences.edit()

var name: String
// get/load value
        get() {
            return preferences.getString(NAME_KEY, "").orEmpty()
        }

// set/save value
        set(value) {
            editor.putString(NAME_KEY, value)
            editor.commit()
        }