Saving Local Data for a list on Flutter

I have an app that plays a sound. There is a list of sounds and I show that to an listview. So user can click a listtile and plays a sound. And I added a "Favourite" section. And it works fine. But when user closes the app it goes away. I tried to use SharedPrefences but I couldnt manage to do it. Because I need to save the whole list and I dont know how.

When I close the app, all my 'favourite' list goes away.

I will just share all the codes for better understanding:


Here is the explaining with the pictures:

Main page with 2 favourite sound

Favourite Page

After the restart


  • Since the list of saved songs is a list of Strings you can use setStringList() method from SharedPrefences. When you want to save the list, use:

    final prefs = await SharedPreferences.getInstance();
    await prefs.setStringList('savedSounds', savedSounds);

    Then when the application starts you load the songs by using:

    final prefs = await SharedPreferences.getInstance();
    savedSounds = prefs.getStringList('savedSounds') ?? [];

    Then you can use a for-loop to also get the saved indexes, although I would recommend you to try only using one list of the saved songs.

    for(int i = 0; i < savedSounds.length; i++){
          if(soundList[i] == savedSounds[i]){