Extension for SharedPreferences¶

In order to make you use SharedPreferences more convenient, VastTools provides following extension functions.

fun SharedPreferences.string(defaultValue: String? = null): ReadWriteProperty<Any, String>

Currently support data type:

String
Set< String>
Int
Long
Float
Boolean
Double

Get started¶

Implement ISharedPreferencesOwner

object SpExample : ISharedPreferencesOwner {
    override val name: String = "Sp name"
    override val kv: SharedPreferences = ... // SharedPreferences instance

    // Declare stored fields
    var isDark by boolean(false)
}

Write to shared preferences
```
SpExample.isDark = !SpExample.isDark
```
Read from shared preferences
```
val isDark = SpExample.isDark
```
Clear shared preferences

Calling clearAll() to remove all values from SharedPreferences.
```
sp.clearAll()
```