如何获取 Android Preferences DataStore 的所有键

Question

如题所述，有没有办法获取Android Jetpack Preferences DataStore中存储的所有密钥，例如dataStore

val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "settings")

Answer 1

获取所有密钥

suspend fun Context.readAllKeys(): Set<Preferences.Key<*>>? {
    val keys = dataStore.data
        .map {
           it.asMap().keys
        }
    return keys.firstOrNull()
}

通过它的键获取价值

suspend fun Context.getValueByKey(key: Preferences.Key<*>): Any? {
    val value = dataStore.data
        .map {
            it[key]
        }
    return value.firstOrNull()
}