Provider to Riverpod

Question

So I am using the Flutter game template, which I found this:

 ProxyProvider2<SettingsController, ValueNotifier<AppLifecycleState>,
              AudioController>(
            // Ensures that the AudioController is created on startup,
            // and not "only when it's needed", as is default behavior.
            // This way, music starts immediately.
            lazy: false,
            create: (context) => AudioController()..initialize(),
            update: (context, settings, lifecycleNotifier, audio) {
              if (audio == null) throw ArgumentError.notNull();
              audio.attachSettings(settings);
              audio.attachLifecycleNotifier(lifecycleNotifier);
              return audio;
            },
            dispose: (context, audio) => audio.dispose(),
          ),

But unfortunately, I don't like provider. How to convert this provider to riverpod?

Hello Mosh. Did you get this working eventually? I'm folloing the same architecture and I have hit a snag — DARTender, Feb 13 '23 at 22:06

score 2 · Accepted Answer · answered Sep 29 '22 at 11:14

2

An equivalent in Riverpod would be:

final settingsProvider = Provider<SettingsController>(...);
final appLifecycleStateProvider = Provider<ValueNotifier<AppLifecycleState>>(...);


final audioControllerProivder = Provider<AudioController>((ref) {
  final audio = AudioController()..initialize();
  ref.onDispose(audio.dispose);

  ref.listen<SettingsController>(settingsProvider, (prev, next) {
    audio.attachSettings(next);
  });
  ref.listen<ValueNotifier<AppLifecycleState>>(appLifecycleStateProvider, (prev, next) {
    audio.attachLifecycleNotifier(next);
  });

  return audio;
});

Although it's possible that there are ways to simplify this further by using ref.watch. But the snippet above should be a good start

answered Sep 29 '22 at 11:14

Rémi Rousselet

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I will try this one – Mosh Mobile Software Engineer Sep 29 '22 at 12:45
By the way, the ValueNotifier it seems a inherited widget `return InheritedProvider>.value( value: lifecycleListenable, child: widget.child, );` – Mosh Mobile Software Engineer Sep 29 '22 at 12:55
how can I listen to the ValueNotifier inherited widget in my riverpod? – Mosh Mobile Software Engineer Sep 29 '22 at 12:56
1

You can convert that provider into a riverpod's provider – Rémi Rousselet Sep 29 '22 at 20:26

score 0 · Answer 2 · answered Oct 26 '22 at 08:19

0

Remi Rousselet

Using the ref.listen is not working, What I did was change it into ref.watch

answered Oct 26 '22 at 08:19

Mosh Mobile Software Engineer

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That's not the same thing as what you described in your question. Using `ref.watch`, your state will reset when the dependency changes – Rémi Rousselet Oct 26 '22 at 12:48

Provider to Riverpod

2 Answers2