Flutter - Dynamic Persistent Theme Switcher using Provider and Shared Preferences 

Thank you. Glad that it was helpful

Thank you

Glad it helped! Awesome, keep fluttering!

Great to hear!

Most welcome. Keep supporting.

Wow! glad to hear that. Thank you for your support and awesome feedback.

Awesome!

@@appwriters It is also the first time I use Provider and a getter, so thank you very much

Go through more tutorials, check out more samples on github how other's have done, you will get there in no time.

@@appwriters actully want to use dark mode and I have customised my buttons color on dark mode as well as light mode. I have made a function to get and set the value on shared preferences. Here are my functions void setBoolToSF(bool boolValue) async { SharedPreferences prefs = await SharedPreferences.getInstance(); prefs.setBool('darkMode', boolValue); } Future getBoolValuesSF() async { SharedPreferences prefs = await SharedPreferences.getInstance(); //Return bool bool boolValue = prefs.getBool('boolValue'); return boolValue; } And here is init function : @override void initState() { super.initState(); _darkMode = _prefs.then((SharedPreferences prefs) { return (prefs.getInt('darkMode') ?? false); }); } Now the issue is how to call the getboolvaluesf? I tried several times and it says future bool connot be assigned to bool value. Then how to call getboolvaluesf ()... On the color argument where I'm using ternary function. Can you help?

Awesome, thank you!

You're welcome!!

You're welcome! Thank you for your support.

@@appwriters can you make a video about 'add to favourite' with provider and sqflite or hive. Please nested local json 🤗

You're welcome 😊

Awesome!!

Hi, please add a runnable flutter code in the repository and send me the link, that way I will be able to run and test and would be help you quicker :)

@@appwriters Sir I have created a repository on GitHub. Please Kindly Check It. Thank You, Sir.

1. Create a splash screen, independent of theme (dark or light), and until the user data is loaded from firestore, display the splash screen, once loaded then load the theme data, to do that you might have use two steps (first a MaterialApp or WidgetsApp, with default theme for splash and loding stuff, then once loaded, another MaterialApp with the theme applied.). Let me know how you did it.

Getter is for private fields, we don't want fields changed outside notifier (as it will not notify) so we make it private, when a variable is private to access it outside the scope of notifier we need a getter

@@appwriters Thank you so much! Your video and reply help me so much!

Yes that happens. For that you can use a theme agnostic splash screen that is used until the persisted value is loaded

Nope, saving to sharedprefs is in background. However we have already updated in the change notifier so we can notify right await to change theme

@@appwriters got it

If you want to prevent that, just introduce a bool loading in the theme notifier, which is by default true and after successfully loaded from shared preferences it's false, and in app, until loading is true, just show a progress bar or splash screen and display the app only after loading is false...

Create a function that returns themedata instead of variable, pass context as parameter

Do share, if you have a public repo, it will be helpful for others..

@@appwriters I used this guy's example medium.com/flutter-community/dynamic-theming-with-flutter-78681285d85f I use it to change basically everything dynamically(Titles, labels, map markers, etc) play.google.com/store/apps/details?id=popcornbeerfootball.kc_gatefinder and the state management stuff I use MobX.

Not sure I understand what you mean?

@@appwriters i want use dark mod and light mod use for same screen when i use switch in drawer , when switch to dark all screens get to dark. i hope you understand.

@@BrYarDJ oh, to do that, you just need to use a stateful widget and based on theme selected (don't change the theme in material app) change on that file only

@@appwriters bro im sorry but i dont understand, this your code in main page its work in main but i dont know how call in second screen or more. void main() => runApp(MyApp()); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return ChangeNotifierProvider( create: (_)=>ThemeNotifier(), child: Consumer( builder: (context,ThemeNotifier notifier,child){ return MaterialApp( title: 'demo', theme:notifier.darkTheme ? dark :light , debugShowCheckedModeBanner: false, home: MyHomePage(), ); }, ), ); } } ............................ i use this in second screen but its not work full response . @override Widget build(BuildContext context) { return MaterialApp( theme: ThemeNotifier().darkTheme ? dark :light, home: Scaffold( i hope fix it