Android Question Firebase auth: method - createuserwithemailAndPassword

[Robert_Rm]

I have problems with Firebase when creating a new user: method - createuserwithemailAndPassword
I get an error.
Can someone help me?
Error log:

Installing file.
PackageAdded: package:com.login.android
** Service (starter) Create **
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
firsttime _ ok
** Activity (main) Resume **
resume
resume
** Activity (main) Pause, UserClosed = false **
** Activity (test_post_error) Create, isFirst = true **
** Activity (test_post_error) Resume **
createUserWithEmailnComplete:false
com.google.android.gms.tasks.RuntimeExecutionException: com.google.firebase.auth.FirebaseAuthUserCollisionException: The email address is already in use by another account.
at com.google.android.gms.tasks.zzh.getResult(Unknown Source)
at de.donmanfred.FirebaseAuthExWrapper$4.onComplete(FirebaseAuthExWrapper.java:155)
at com.google.android.gms.tasks.zzc$1.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7225)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: com.google.firebase.auth.FirebaseAuthUserCollisionException: The email address is already in use by another account.
at com.google.android.gms.internal.zzbix.zzcb(Unknown Source)
at com.google.android.gms.internal.zzbiu$zzj.zza(Unknown Source)
at com.google.android.gms.internal.zzbjf.zzcc(Unknown Source)
at com.google.android.gms.internal.zzbjf$zza.onFailure(Unknown Source)
at com.google.android.gms.internal.zzbja$zza.onTransact(Unknown Source)
at android.os.Binder.execTransact(Binder.java:453)

 

[Erel]

You should post the error message from the logs (right click to copy).

 

[npsonic]

This is still a problem. If user is already authenticated and "createUserWithEmailAndPassword" is used with same email the app will crash.
Crash will happen even with the Try Catch

com.google.android.gms.tasks.RuntimeExecutionException: com.google.firebase.auth.FirebaseAuthUserCollisionException: The email address is already in use by another account.
    at com.google.android.gms.tasks.zzu.getResult(Unknown Source:30)
    at de.donmanfred.FirebaseAuthExWrapper$4.onComplete(FirebaseAuthExWrapper.java:155)
    at com.google.android.gms.tasks.zzj.run(Unknown Source:32)
    at android.os.Handler.handleCallback(Handler.java:789)
    at android.os.Handler.dispatchMessage(Handler.java:98)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6809)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: com.google.firebase.auth.FirebaseAuthUserCollisionException: The email address is already in use by another account.
    at com.google.firebase.auth.api.internal.zzce.zzb(Unknown Source:95)
    at com.google.firebase.auth.api.internal.zzbb.zza(Unknown Source:55)
    at com.google.firebase.auth.api.internal.zzcy.zzc(Unknown Source:19)
    at com.google.firebase.auth.api.internal.zzdb.onFailure(Unknown Source:51)
    at com.google.firebase.auth.api.internal.zzci.dispatchTransaction(Unknown Source:101)
    at com.google.android.gms.internal.firebase_auth.zzb.onTransact(Unknown Source:49)
    at android.os.Binder.execTransact(Binder.java:692)

 

[DonManfred]

Why you are registering again with this email? Use login with this email instead of trying to register a new account

 

[npsonic]

Why you are registering again with this email? Use login with this email instead of trying to register a new account

If client is trying to register again with the email that has already been registered, how could I stop it?
Is there any way to check if that email is authenticated?

 

[DonManfred]

Use Try Catch to catch the error and show a Alert to the user

 

[npsonic]

Try Catch doesn't work, app will crash even with the whole code in Try Catch

 

[DonManfred]

Is there any way to check if that email is authenticated?

You can use Firebase Admin tools to check the userlist. Firebase Admin Tools can only run in Servermode so you´ll need to use B4J for this.

But it is possible to get all registered Accounts with Firebase Admin.

 

[npsonic]

You can use Firebase Admin tools to check the userlist. Firebase Admin Tools can only run in Servermode so you´ll need to use B4J for this.

But it is possible to get all registered Accounts with Firebase Admin.

You are right there is now API for that, but wouldn't that be very bad practice to get all users everytime when someone is registering there email.
When amount of authenticated users is growing sign up would take longer and longer for each user.

 

[DonManfred]

No one stopps you to get the list on the server and create a database for you.

For any more question; Please create a new Thread!

You should have started with a new thread ALWAYS BTW.

 

[npsonic]

It seems that you aren't handling exceptions in your code.

Right way to do this would be

mAuth.createUserWithEmailAndPassword(email, password)
            .addOnCompleteListener(
                    new OnCompleteListener<AuthResult>()
                    {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task)
                        {
                            if (!task.isSuccessful())
                            {
                                try
                                {
                                    throw task.getException();
                                }
                                // if user enters wrong email.
                                catch (FirebaseAuthWeakPasswordException weakPassword)
                                {
                                    Log.d(TAG, "onComplete: weak_password");

                                    // TODO: take your actions!
                                }
                                // if user enters wrong password.
                                catch (FirebaseAuthInvalidCredentialsException malformedEmail)
                                {
                                    Log.d(TAG, "onComplete: malformed_email");

                                    // TODO: Take your action
                                }
                                catch (FirebaseAuthUserCollisionException existEmail)
                                {
                                    Log.d(TAG, "onComplete: exist_email");

                                    // TODO: Take your action
                                }
                                catch (Exception e)
                                {
                                    Log.d(TAG, "onComplete: " + e.getMessage());
                                }
                            }
                        }
                    }
            );

 

[DonManfred]

I can´t change the library as i lost the source of it last year with a HDD Crash.

 

[npsonic]

I'm not expert on this matter and wouldn't want to create whole library again.

Can't we some how catch the exception, so that it wouldn't crash the app? I have now made some testing with inline java, but can't get anything to work.
App will always crash.

Erel, if you are reading this some expertise is needed here.

 

[Erel]

Erel, if you are reading this some expertise is needed here.

If you can get a reference to mAuth with JavaObject or Reflector then you can call this method with JavaObject and implement the listener with JavaObject.CreateEventFromUI.

 

[DonManfred]

You can also try to use Firebase UI Auth Library.
It allows you to try to create new account with an existing email. The user is asked for the password in this case.
I just tried to add a new email matching an existing email.