在 Android Studio 中，如何检查用户是匿名登录还是使用 email 或 google 登录？

Question

I have an app. On startup, it is logging in anonymously, automatically. Then you can sign in for real if you want. There is a button, that i want to make useable only for "real logged-in" users. I tried this code but this is true for anonymously signed-in users too:

user = FirebaseAuth.getInstance().getCurrentUser();     
                if(user != null){
                //can use button
                }else{
                    // "please sign in!"
                }

Answer 1

You can see whether the user is anonymously logged in by checking its isAnonymous() method .

If you want to check for specific non-anonymous providers, you can check the providerId in the providerData as shown here: Detect Firebase Auth Provider for Loged in User