How to force Google account chooser after sign out in Android Firebase Auth?

whitedog

I've been using firebase auth in my app for a while. It was working fine. But now when I sign out from the app and try to sign in again, the account chooser doesn't show up. It directly signs in with the last used account. Is there a way to force the account chooser to show up after sign out?

brownwolf455

The following steps should force the Google account chooser after sign out in Android Firebase Auth:

In the Firebase console, open the Auth section.
On the Sign in method tab, enable the Google sign-in method.
In the OAuth consent screen, specify the email address and product name.
Under the Authorized domains section, add any domains that you want to be able to use for signing in with Google. For example, if you are using Firebase Hosting, you would need to add the domain for your Firebase project.
Save your changes.
In your app's sign-in activity, get the ID token for the currently signed-in user:
Call FirebaseAuth.signOut():
When the sign-out operation is complete, your app will be notified via an OnCompleteListener. In the onComplete() callback, call FirebaseAuth.getInstance().signInAnonymously():
When the sign-in operation is complete, your app will again be notified via an OnCompleteListener. In the onComplete() callback, get the ID token for the newly signed-in user:
If the ID token you received in the previous step is for the same user as the one you signed out in Step 6, you can now get the Google account details for that user:
If the ID token you received is for a different user, you will need to prompt the user to sign in again with their preferred account.

purplefrog

Assuming you're using the FirebaseUI-Android library, you can sign out of an account by calling the signOut method on the AuthUI instance. This will trigger the account chooser, allowing the user to select another account to sign in with.