How to properly implement Logout with firebase on flutter

Question

It sounds stupid but I cant really properly logout of my app and that is because I use multiple FirebaseAnimatedList and route on my MaterialApp

routes: <String,WidgetBuilder>{
    '/StartAppPage':(BuildContext context)=>new StartAppPage(),
    '/LoginPage':(BuildContext context)=> new LoginPage(),
    '/HomePage':(BuildContext context)=> new HomePage)
  },

So the app checks for use and routes to HomePage or Login based on is there is a user or not.

My Home page has a FirebaseAnimatedList and on my Home page there is a Logout button that do this

await googleSignIn.signOut();
await FirebaseAuth.instance.signOut();
await FirebaseDatabase.instance.goOffline();
return Navigator.pushReplacementNamed(context, '/StartApp');

to HomePage and logout the user.

But when the other user login again the List shows data of the old user and the list is usable messing my Database

How can I properly implement this and the setPersistance is off or on makes no difference

Solution: Keep a single instance of your firebase user through the app. I recommend a global variable

It also may be an issue related to the way you are communicating data from your database — Shady Aziza, Feb 24 '18 at 16:43
I mean it is either you are not properly signing the user out or you are not viewing the data in the correct way (based on current user) — Shady Aziza, Feb 24 '18 at 17:10
That makes more sense, I can log in and log out with right users, the query I am using requires my current user details to execute.Its currently awaiting a user to be there to show the list and the user is set on every page. — PrimeNexes, Feb 25 '18 at 10:40
@Prime Please do not replace the body of your question with an answer. Post the answer as an answer. — GSerg, Feb 25 '18 at 10:55
My implementation turnout to be completely unrelated to the main question. I'll add on the answer — PrimeNexes, Feb 26 '18 at 12:06

score 0 · Answer 1 · answered Oct 21 '21 at 18:27

After signing out, what you can consider doing here is check on the current screen if the user is authenticated or not. If the user is still logged-in, display the data. If not, then navigate to a Login screen.

FirebaseAuth.instance
  .idTokenChanges()
  .listen((User? user) {
    if (user == null) {
      debugPrint('User is currently signed out!');
      // TODO: navigate to Login screen?
    } else {
      debugPrint('User is signed in!');
      // TODO: display data
    }
  });

How to properly implement Logout with firebase on flutter

1 Answers1

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