Your Second Kotlin Android App

Aug 29 2023 · Kotlin 1.8.21, Android 13, Android Studio Flamingo | 2022.2.1

Part 3: Save Preferences

19. Create a ViewModel

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Previous episode: 18. Explore Shared Preferences Next episode: 20. Challenge: Create an Instance of ListDataManager

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00:02In the previous episode, you used Shared Preferences as a way to save data. The data driving your app is known as the model. The model doesn’t just have to be shared prefs. It’s whatever holds the backing data.

class ListDataManager(application: Application)
: AndroidViewModel(application)
fun saveList(list: TaskList) {
    val sharedPrefs = PreferenceManager.getDefaultSharedPreferences(application)
        .edit()
    //..
}

fun readLists(): ArrayList<TaskList> {
    val sharedPrefs = PreferenceManager.getDefaultSharedPreferences(application)
    //..
    
}