B4J Tutorial [ABMaterial] Firebase Auth for Users in 1.20

Just like Erel has added the Firebase Auth Service to B4A (https://www.b4x.com/android/forum/threads/firebaseauth-authenticate-your-users.67875/) you can also use it to login with your ABMaterial (1.20) WebApp.

For WebApps, the procedure is quite simple.

Setup:

1. In the Firebase console create a new Project: https://console.firebase.google.com/
firebase1.png


2. Click 'Add Firebase to your web app'.

3. You get all the keys needed for ABMaterial.
firebase3.png


Usage in ABMaterial:

1. In BuildPage() initialize the Firebase API:

B4X:
' NEW FIREBASE
    page.Firebase.ApiKey = "AIzaSyCS5-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    page.Firebase.AuthDomain = "project-xxxxxxxxxxxxxxxxxxxxxxxxxxx.firebaseapp.com"
    page.Firebase.DatabaseURL = "https://project-xxxxxxxxxxxxxxxxxxxxxxxx.firebaseio.com" 
    page.Firebase.StorageBucket = "project-xxxxxxxxxxxxxxxxxxxxxxx.appspot.com"

2. In Websocket_Connected() use one of the Firebase connection methods. You can also create buttons and then in the Clicked_Event call the one you want (Google, Facebook, ...)

B4X:
' NEW FIREBASE
   page.Firebase.CheckAuthorized

3. The events:

B4X:
' NEW FIREBASE
Sub Page_FirebaseAuthStateChanged(IsLoggedIn As Boolean)   
  Log(IsLoggedIn)
   If IsLoggedIn Then     
     page.Firebase.Auth.CurrentUser.UpdateFromBrowser' IMPORTANT
     Log("ProviderId: " & page.Firebase.Auth.CurrentUser.ProviderId)
     Log("ProviderData: " & page.Firebase.Auth.CurrentUser.ProviderData.Size)
   Else
     Log("Authorizing...")     
     page.Firebase.Auth.SignInWithGoogle(False)   
   End If
End Sub

' NEW FIREBASE
Sub Page_FirebaseAuthError(extra As String)
    Log(extra)
End Sub

4. You can sign out by using page.Firebase.Auth.SignOut(). Depending on the result, one of the above events will be raised.

EDIT: Updated the SignIn... methods to match the B4A ones. I also simplified the check to one command:

page.Firebase.CheckAuthorized
 
Last edited:

litefrez

New Member
Licensed User
Working with this auth using the firebase gmail and email and password, but having an issue troubleshooting why my google auth works fine, but the email/password does not appear to return an error or a change of user state. Any help with trying to find the return or any log data of the info passed between my app and the firebase server would be appreciated.
 

litefrez

New Member
Licensed User
Actually, I apologize for bothering you. I found out that the b4a firebase auth lib doesn't allow it, I can't use it for the time being anyway. Once the b4a lib is updated to include it, if that ever happens, I will get back on this. Thank you so much for your willingness and for the abmaterial work that you have done. I have another question possibly if I can't figure it out, I will be posting a new question. Thanks again.
 

slamarca

Member
Licensed User
Hi I can't figure which is the logic flow in trying to authenticate with Firebase from the ABMaterial Demo app login modal.
Do someone have a working fragment to show me the way?

Thanks to all.
 

stanmiller

Active Member
Licensed User
Usage in ABMaterial:

1. In BuildPage() initialize the Firebase API:

B4X:
' NEW FIREBASE
    page.Firebase.ApiKey = "AIzaSyCS5-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    page.Firebase.AuthDomain = "project-xxxxxxxxxxxxxxxxxxxxxxxxxxx.firebaseapp.com"
    page.Firebase.DatabaseURL = "https://project-xxxxxxxxxxxxxxxxxxxxxxxx.firebaseio.com"
    page.Firebase.StorageBucket = "project-xxxxxxxxxxxxxxxxxxxxxxx.appspot.com"

@alwaysbusy

Firebase has added a new field to the configuration, messagingSenderID. Plus the version is now 3.6.4.

<script src="https://www.gstatic.com/firebasejs/3.6.4/firebase.js"></script>
<script>
// Initialize Firebase
var config = {
apiKey: "AIzaSyxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
authDomain: "mywebtoberapp-984d6.firebaseapp.com",
databaseURL: "https://mywebtoberapp-984d6.firebaseio.com",
storageBucket: "mywebtoberapp-984d6-979d6.appspot.com",
messagingSenderId: "123456789012"
};
firebase.initializeApp(config);
</script>

Didn't know if you had this on the list. I can add to the feedback portal.
 
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