How it works

@Bulldog(name = "UserSettings")
object UserModel {
    const val id: Int = 20
    const val email: String = "johnDoe@gmail.com"
    const val likes: Long = 20L
    const val isPremium: Boolean = false
    const val minutesLeft: Float = 24.5F
}

​
class UserSettings {
    private val prefs: SharedPreferences =
            bullDogCtx.getSharedPreferences(javaClass.simpleName, MODE_PRIVATE)
​
    var id: Int by bindPreference(prefs, 20, "id")
​
    var email: String by bindPreference(prefs, "johnDoe@gmail.com", "email")
​
    var likes: Long by bindPreference(prefs, 20, "likes")
​
    var isPremium: Boolean by bindPreference(prefs, false, "isPremium")
​
    var minutesLeft: Float by bindPreference(prefs, 24.5F, "minutesLeft")
​
    fun clearId() = prefs.edit().remove("id").apply()
​
    fun clearEmail() = prefs.edit().remove("email").apply()
​
    fun clearLikes() = prefs.edit().remove("likes").apply()
​
    fun clearIsPremium() = prefs.edit().remove("isPremium").apply()
​
    fun clearMinutesLeft() = prefs.edit().remove("minutesLeft").apply()
​
    fun clearAll() {
        prefs.edit().apply{remove("id")
        remove("email")
        remove("likes")
        remove("isPremium")
        remove("minutesLeft")
        }.apply()
    }
​
    override fun toString(): String = "UserSettings  id=$id, email=$email, likes=$likes, isPremium=$isPremium, minutesLeft=$minutesLeft,"
    }