Your Second Kotlin Android App

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

Part 3: Save Preferences

18. Explore Shared Preferences

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To create a to-do list, you need to save them to disk. Android comes with lots of different ways to save data. In fact, we have an entire course on saving data that is a part of the Android Learning Path.

class ListDataManager(private val context: Context) {

}

fun saveList(list: TaskList) {

}

val sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context).edit()

implementation 'androidx.preference:preference-ktx:1.2.0'

sharedPrefs.putStringSet(list.name, list.tasks.toHashSet())

sharedPrefs.apply()

fun readLists(): ArrayList<TaskList> {

}

val sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context)

val contents = sharedPrefs.all
val taskLists = ArrayList<TaskList>()

for (taskList in contents) {

}

val taskItems = ArrayList(taskList.value as HashSet<String>)

val list = TaskList(taskList.key, taskItems)

taskLists.add(list)

return taskLists