[코틀린] SharedPreference
잘 짜여진 예제를 줍줍했다!
object PreferenceHelper {
fun defaultPrefs(context: Context): SharedPreferences
= PreferenceManager.getDefaultSharedPreferences(context)
fun customPrefs(context: Context, name: String): SharedPreferences
= context.getSharedPreferences(name, Context.MODE_PRIVATE)
inline fun SharedPreferences.edit(operation: (SharedPreferences.Editor) -> Unit) {
val editor = this.edit()
operation(editor)
editor.apply()
}
fun SharedPreferences.setValue(key: String, value: Any?) {
when (value) {
is String? -> edit({ it.putString(key, value) })
is Int -> edit({ it.putInt(key, value) })
is Boolean -> edit({ it.putBoolean(key, value) })
is Float -> edit({ it.putFloat(key, value) })
is Long -> edit({ it.putLong(key, value) })
else -> throw UnsupportedOperationException("Not yet implemented")
}
}
inline fun <reified T : Any> SharedPreferences.get(key: String, defaultValue: T? = null): T? {
return when (T::class) {
String::class -> getString(key, defaultValue as? String) as T?
Int::class -> getInt(key, defaultValue as? Int ?: -1) as T?
Boolean::class -> getBoolean(key, defaultValue as? Boolean ?: false) as T?
Float::class -> getFloat(key, defaultValue as? Float ?: -1f) as T?
Long::class -> getLong(key, defaultValue as? Long ?: -1) as T?
else -> throw UnsupportedOperationException("Not yet implemented")
}
}