Kotlin DataStore

 - apply dependencies

implementation "androidx.datastore:datastore-preferences:$latestversion"

- create instance prefrences data store

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

- define preferences datastore key word

val EXAMPLE_COUNTER = intPreferencesKey("example_counter")

- get value from preferences datastore

val exampleCounterFlow: Flow<Int> = context.dataStore.data

  .map { preferences ->

    // No type safety.

    preferences[EXAMPLE_COUNTER] ?: 0

}

- saving value

suspend fun incrementCounter() {

  context.dataStore.edit { settings ->

    // get value 

    val currentCounterValue = settings[EXAMPLE_COUNTER] ?: 0

 

    // edit value 

    settings[EXAMPLE_COUNTER] = currentCounterValue + 1

  }

}