Force upgrade in Flutter App

A common requirement when you launch an app on App Store or Play Store is, how to upgrade the app or show the upgraded version of app to the users. You can use this code with your app’s login or home page, whenever the user clicks the home page or re-login. This dialog will appear on the screen

Here you can set flag for user , if you want user can access flutter app after update app, then you can use this code and you can also customize this code as per your requirement

@override
   void initState() {
     super.initState();
     Future.delayed(Duration.zero).then((value) {
       Provider.of<NAME OF YOUR PROVIDER >(context, listen: false).newVersionOfApp(context);
     });
   }

void newVersionOfApp(BuildContext context) {
    showDialog(
      barrierDismissible: false,//visible /not visible background when dialog open
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(

          title: const Center(child: Text("Message")),
          content: const Text(
            "New Version of App",
            textAlign: TextAlign.center,
          ),
          actions: [
            Center(
              child: ElevatedButton(
                style: //
                child: const Text('update'),
                onPressed: () {
                 // launchUrl(androidAppUrl);//here you can pass url of Google play store instead of this androidAppUrl
                },
              ),
            ),
          ],
        );
      },
    );
    
  }