一對一直播系統開發Jetpact Compose狀態管理儲存狀態的方式
以下三種方式，可以實現對非 Bundle 的資料的儲存（配置更改後的儲存）
Parcelize
程式碼示例：

@Parcelize
data class City(val name: String, val country: String) : Parcelable

@Composable
fun CityScreen() {
var selectedCity = rememberSaveable {
mutableStateOf(City("Madrid", "Spain"))
}
}

MapSaver

data class
 
 City(val name: String, val country: String)

val CitySaver = run {
val nameKey = "Name"
val countryKey = "Country"
mapSaver(
save = { mapOf(nameKey to it.name, countryKey to it.country) },
restore = { City(it[nameKey] as String, it[countryKey] as String) }
)
}

@Composable
fun CityScreen() {
var selectedCity = rememberSaveable(stateSaver = CitySaver) {
mutableStateOf(City(
 
"Madrid", "Spain"))
}
}

ListSaver

data class City(val name: String, val country: String)

val CitySaver = listSaver<City, Any>(
save = { listOf(it.name, it.country) },//陣列中儲存的值和City中的屬性是順序對應的
restore = { City(it[0] as String, it[1] as String) }
)

@Composable
fun CityScreen() {
var selectedCity = rememberSaveable(stateSaver = CitySaver) {
mutableStateOf(City(
 
"Madrid", "Spain"))
}
}
 

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