B4A Library FirebaseAuth - Authenticate your users

Erel · Jun 13, 2016

This library requires B4A v6+.

It allows the users to sign in to your app with their Google account (more identity providers will be added in the future).

Like all Firebase services it is quite simple to integrate this service in your app.

1. Follow this tutorial and make sure to add the Firebase Auth manifest snippet: https://www.b4x.com/android/forum/threads/integrating-firebase-services.67692/

2. This service requires that the signing key SHA1 signature is set in the Firebase project settings:

You can find this value under Tools - Private Sign Key, in the signature field:

Initialize the FirebaseAuth object and call SignInWithGoogle to sign in. Note that the user will be signed in automatically when the program restarts.

B4X:

Sub Process_Globals
   Private auth As FirebaseAuth
End Sub

Sub Globals
   Private lblName As Label
End Sub

Sub Activity_Create(FirstTime As Boolean)
   If FirstTime Then
     auth.Initialize("auth")
   End If
   Activity.LoadLayout("1")
   If auth.CurrentUser.IsInitialized Then Auth_SignedIn(auth.CurrentUser)
End Sub

Sub btnSignIn_Click
   auth.SignInWithGoogle
End Sub

Sub btnSignOut_Click
   auth.SignOutFromGoogle
   lblName.Text = "Goodbye!"
End Sub

Sub Auth_SignedIn (User As FirebaseUser)
   Log("SignedIn: " & User.DisplayName)
   lblName.Text = "Hello: " & User.DisplayName
End Sub

Next:
- Combine Google and Facebook: https://www.b4x.com/android/forum/t...seauth-to-support-facebook.67954/#post-430482
- Server verification of signed in users: https://www.b4x.com/android/forum/t...end-authentication-for-signed-in-users.68672/

FirebaseAuth is an internal library now. It is preinstalled with the IDE.

V2.01 is attached. It adds a SignError (Error As Exception) event.

Rajesh Krishnan · Feb 7, 2017

Hey Erel,
Following the steps uv given for the user authentication, on executing the firebase example gives an error telling package name doesnt match. But how would we get the package name without once running the code.

Erel · Feb 7, 2017

Rajesh Krishnan said:
Hey Erel,

Please don't limit your questions to a single member.

You can change the package name under Project - Build Configurations.

itgirl · Feb 12, 2017

running the example using my own google-json and after changing the package name i get this error

B4X:

** Service (starter) Create **
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
main_activity_create (java line: 339)
android.content.res.Resources$NotFoundException: String resource ID #0x0
    at android.content.res.Resources.getText(Resources.java:1334)
    at android.content.res.Resources.getString(Resources.java:1428)
    at anywheresoftware.b4a.objects.FirebaseAuthWrapper.Initialize(FirebaseAuthWrapper.java:64)
    at natchcenter.com.refuni.main._activity_create(main.java:339)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
    at natchcenter.com.refuni.main.afterFirstLayout(main.java:102)
    at natchcenter.com.refuni.main.access$000(main.java:17)
    at natchcenter.com.refuni.main$WaitForLayout.run(main.java:80)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:145)
    at android.app.ActivityThread.main(ActivityThread.java:5951)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)

any one has an idea whats going on ?

with mainfest set to

B4X:

<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="25"/>

testing on Galaxy S4 with android 5

Erel · Feb 13, 2017

I don't recommend you to set the targetSdkVersion to 25. There might be side effects that you are unaware of.

It looks like a problem with google-services.json. Try to download it again.

itgirl · Feb 13, 2017

Erel said:
I don't recommend you to set the targetSdkVersion to 25. There might be side effects that you are unaware of.

It looks like a problem with google-services.json. Try to download it again.

actually it was 23 but i tried 25 to see if the error goes away , i tried to download google-services.json 3 times and the error still exists. by the way in the same project i have firebase FCM and firebase ads working like a charm just auth lib causes this error

B4X:

auth.Initialize("auth")

.
also i tried uninstall and reinstall

Erel · Feb 13, 2017

1. Can you send me your google-services.json file to erel@basic4ppc.com?

2. Have you added the SHA-1 signature as explained in step #2 ?
https://www.b4x.com/android/forum/threads/firebaseauth-authenticate-your-users.67875/

itgirl · Feb 13, 2017

Erel said:
1. Can you send me your google-services.json file to erel@basic4ppc.com?

2. Have you added the SHA-1 signature as explained in step #2 ?
https://www.b4x.com/android/forum/threads/firebaseauth-authenticate-your-users.67875/

the file is sent,

and yeah i did add the SHA-1 signature

Erel · Feb 13, 2017

The json file downloaded is missing required fields.

It should include this field: "client_type": 3

Try to make a few changes in Firebase console and download a new json file.

If it doesn't help then try to create a new Firebase project.

itgirl · Feb 13, 2017

Erel said:
The json file downloaded is missing required fields.

It should include this field: "client_type": 3

Try to make a few changes in Firebase console and download a new json file.

If it doesn't help then try to create a new Firebase project.

Automated json file from firebase console is always buggy for me, changes to a project not always take effect in google-services.json but it always works after 2nd or 3rd download but with this auth didnt work even 4th download :/ can i edit the file manually and add the missing fields?

Erel · Feb 13, 2017

You cannot add it manually as the important value is missing. The client_type is only used to find it.

itgirl · Feb 13, 2017

Erel said:
You cannot add it manually as the important value is missing. The client_type is only used to find it.

Thank you so much Erel I'll try with the FireBase console again

itgirl · Feb 20, 2017

Confirmed , for further help any one whos facing the same issue as the one mentioned in #63 you MUST delete the whole project not the app and re create it in order to work , it's a bug reported many times in FireBase

Happy coding

desof · Mar 16, 2017

Why does this happen with Facebook that some emails are not displayed?

Erel · Mar 16, 2017

See the comment here: https://github.com/firebase/quickstart-android/issues/13#issuecomment-222818397

Check your settings. Based on that answer it can happen if the "Allow creation of multiple accounts with the same email address " option is set.

syderbit · Apr 8, 2017

DonManfred said:
Erel gave me the source of the lib so i can add them ;-)
I m working on it...

Will check to add this too

send me too ....
@Erel

Erel · Apr 9, 2017

The source code is attached.

syderbit · Apr 9, 2017

Thank you @Erel

Intiwhiz · May 12, 2017

Dear @Erel,

I have trouble while compile the program, it show picture below

Your assistance really appriciated

Thanks

Erel · May 14, 2017

Please start a new thread for this.

somed3v3loper · Jun 8, 2017

Phone sign-in method is now enabled .
Can we have a library or this one source code ?
Thanks

B4A Library FirebaseAuth - Authenticate your users

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