Koltin property delegate tools for Android SharedChamber --> https://github.com/afiqiqmal/SharedChamber

SharedChamberPropertyDelegate.kt

class SharedChamberPropertyDelegate<T>(
    private val sharedChamber: SharedChamber<Any>,
    private val defaultValue: T,
    private val getter: SharedChamber<Any>.(String, T) -> T,
    private val setter: SharedChamber<Any>.(String, T) -> Unit
) : ReadWriteProperty<Any, T> {


    override fun getValue(thisRef: Any, property: KProperty<*>): T =
        sharedChamber.getter(property.name, defaultValue)

    override fun setValue(thisRef: Any, property: KProperty<*>, value: T) {
        sharedChamber.setter(property.name, value)
    }
}

fun SharedChamber<Any>.booleanDelegate(defaultValue: Boolean = false): ReadWriteProperty<Any, Boolean> =
    SharedChamberPropertyDelegate(
        sharedChamber = this,
        defaultValue = defaultValue,
        getter = SharedChamber<Any>::getBoolean,
        setter = SharedChamber<Any>::put
    )

fun SharedChamber<Any>.intDelegate(defaultValue: Int = 0): ReadWriteProperty<Any, Int> =
    SharedChamberPropertyDelegate(
        sharedChamber = this,
        defaultValue = defaultValue,
        getter = SharedChamber<Any>::getInt,
        setter = SharedChamber<Any>::put
    )

fun SharedChamber<Any>.longDelegate(defaultValue: Long = 0L): ReadWriteProperty<Any, Long> =
    SharedChamberPropertyDelegate(
        sharedChamber = this,
        defaultValue = defaultValue,
        getter = SharedChamber<Any>::getLong,
        setter = SharedChamber<Any>::put
    )

fun SharedChamber<Any>.floatDelegate(defaultValue: Float = 0f): ReadWriteProperty<Any, Float> =
    SharedChamberPropertyDelegate(
        sharedChamber = this,
        defaultValue = defaultValue,
        getter = SharedChamber<Any>::getFloat,
        setter = SharedChamber<Any>::put
    )

fun SharedChamber<Any>.stringDelegate(defaultValue: String? = null): ReadWriteProperty<Any, String?> =
    SharedChamberPropertyDelegate(
        sharedChamber = this,
        defaultValue = defaultValue,
        getter = SharedChamber<Any>::getString,
        setter = SharedChamber<Any>::put
    )

fun SharedChamber<Any>.dateDelegate(defaultValue: Date? = null): ReadWriteProperty<Any, Date?> =
    SharedChamberPropertyDelegate(
        sharedChamber = this,
        defaultValue = defaultValue,
        getter = SharedChamber<Any>::getDate,
        setter = SharedChamber<Any>::put
    )

fun SharedChamber<Any>.getDate(key: String, defaultValue: Date? = null): Date? =
    getLong(key, -1).let {
        if (it >= 0) Date(it) else defaultValue
    }

fun SharedChamber<Any>.put(key: String, value: Date? = null) =
    if (value != null) {
        put(key, value.time)
    } else {
        remove(key)
    }

SharedPreferenceManager.kt

class SharedPreferenceManager(
    val context: Context
) {

    private val sharedPreferences by lazy {
        PreferenceManager.getDefaultSharedPreferences(context)
    }

    var one by sharedChamber.stringDelegate()
    var two by sharedPreferences.dateDelegate()
    var three by sharedChamber.stringDelegate()
    var four by sharedChamber.booleanDelegate(false)


}