B4A Library Facebook - Extends FirebaseAuth to support Facebook

Erel · Jun 15, 2016

This library requires B4A v12.0+

This library together with FirebaseAuth allows users to sign in to your app with a Facebook or Google account.

Start with configuring FirebaseAuth: https://www.b4x.com/android/forum/threads/firebaseauth-authenticate-your-users.67875/
Once it works you can follow these instructions to add support for Facebook.

You should create a facebook app with an Android platform:

Enable Facebook in Firebase console: Auth - Sign In Method:

Add the OAuth redirect URI from Firebase to Facebook Login product:

You will need to follow these instructions to create a hash key from B4A signing key: https://developers.facebook.com/docs/android/getting-started#release-key-hash
The alias in the command should be B4A.

Add the following snippet to the manifest editor and make sure to update facebook_app_id and the client token (https://developers.facebook.com/docs/facebook-login/guides/access-tokens#clienttokens):

B4X:

'************ Facebook Login ****************
CreateResource(values, facebook.xml, <resources>
    <string name="facebook_app_id">111111111111111</string>
   </resources>)
  
 AddApplicationText(<meta-data android:name="com.facebook.sdk.ClientToken" android:value="aaaaaaaaaabbbbbbbe053434346"/>)

AddApplicationText( <activity
            android:name="com.facebook.FacebookActivity"
            android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
           android:theme="@android:style/Theme.Translucent.NoTitleBar" />
          <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>)
  
AddApplicationText(
    <provider
            android:name="com.facebook.internal.FacebookInitProvider"
            android:authorities="${applicationId}.FacebookInitProvider"
            android:exported="false" />

        <receiver
            android:name="com.facebook.CurrentAccessTokenExpirationBroadcastReceiver"
            android:exported="false" >
            <intent-filter>
                <action android:name="com.facebook.sdk.ACTION_CURRENT_ACCESS_TOKEN_CHANGED" />
            </intent-filter>
        </receiver>
        <receiver
            android:name="com.facebook.AuthenticationTokenManager$CurrentAuthenticationTokenChangedBroadcastReceiver"
            android:exported="false" >
            <intent-filter>
                <action android:name="com.facebook.sdk.ACTION_CURRENT_AUTHENTICATION_TOKEN_CHANGED" />
            </intent-filter>
        </receiver>
       
         <activity
            android:name="com.facebook.FacebookActivity"
            android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
            android:theme="@style/com_facebook_activity_theme" />
        <activity android:name="com.facebook.CustomTabMainActivity" />
        <activity
            android:name="com.facebook.CustomTabActivity"
            android:exported="true"
             >
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />

                <data
                    android:host="cct.${applicationId}"
                    android:scheme="fbconnect" />
            </intent-filter>
        </activity>
)

'************ Facebook Login (end) **********

Replace the number with your Facebook app id.

The code itself is simple. You need to initialize FacebookSdk in the starter service.
Call SignIn from an Activity to sign in.
Note that the user will sign in automatically after the first time.

Auth_SignedIn event is raised after the user signs in.

Firebase instructions: https://firebase.google.com/docs/auth/android/facebook-login
Facebook instructions: https://developers.facebook.com/docs/facebook-login/android

Note that you need to "make the app public" before other users can log in:

Updates

v2.01 - Adds missing dependencies.
v2.00 - Based on Facebook 14.1.1
v1.04 - Based on Facebook 11.2
v1.02 - Based on Facebook SDK 7.0.0.
v1.01 - Based on Facebook SDK 5.50.

Download link: https://www.b4x.com/android/files/facebook.zip

Erel · Jun 29, 2021

It is possible that Facebook no longer provides the email. Apple made a similar change last year.

What is the output of:

B4X:

Log("SignedIn: " & User.DisplayName)
    Log(User.Uid)
    Log("Email: " & User.Email)

stevenindon · Jun 29, 2021

Hi,

Face book returned User.Displayname, User.uid and Facebook photo url.

I have another application running on flutter (connects to the same firebase + Facebook app) and I am able to get email return from Facebook.

There is something in flutter programming that I add :

https://graph.facebook.com/v2.12/me?fields=name,first_name,last_name,email&access_token=$TOKEN

Wonder if query is the same for B4a Facebook library?...

Erel · Jun 29, 2021

This is a different method - OAuth. You can do it yourself with OkHttpUtils2.

Try this: https://www.b4x.com/android/forum/t...ith-a-firebaseauth-library.126613/post-791731

stevenindon · Jun 30, 2021

I see. Thanks for the suggestion Erel. Will look into this.

Erel · Oct 31, 2022

V2.00 released. Requires B4A v12.0. Make sure to update the manifest editor code.

Abdou1283 · Nov 6, 2022

Erel said:
V2.00 released. Requires B4A v12.0. Make sure to update the manifest editor code.

An error has occured in the sample project

B4X:

The SDK has not been initialized, make sure to call FacebookSdk.sdkInitialize() first.

Erel · Nov 6, 2022

Please post logs and code as text.

Abdou1283 · Nov 6, 2022

Erel said:
Please post logs and code as text.

Error occured on line 13 in starter service for both
facebook.initialize and facebook.initialize2("fb")

B4X:

Copying updated assets files (5)
*** Service (starter) Create ***
Error occurred on line: 13 (Starter)
The SDK has not been initialized, make sure to call FacebookSdk.sdkInitialize() first.
    at com.facebook.internal.Validate.sdkInitialized(Validate.kt:129)
    at com.facebook.login.LoginManager.<init>(LoginManager.kt:1398)
    at com.facebook.login.LoginManager$Companion.getInstance(LoginManager.kt:1319)
    at com.facebook.login.LoginManager.getInstance(Unknown Source:2)
    at anywheresoftware.b4x.objects.FacebookSdkWrapper.Initialize2(FacebookSdkWrapper.java:91)
    at chouaibi.dev.kids.puzzle.starter._service_create(starter.java:181)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:348)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:146)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:193)
    at chouaibi.dev.kids.puzzle.starter.onCreate(starter.java:56)
    at android.app.ActivityThread.handleCreateService(ActivityThread.java:4661)
    at android.app.ActivityThread.access$1700(ActivityThread.java:301)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2196)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:246)
    at android.app.ActivityThread.main(ActivityThread.java:8653)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
** Service (starter) Start **

this is my manifest

B4X:

AddManifestText(
<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="31"/>
<supports-screens android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
'End of default text.

CreateResourceFromFile(Macro, FirebaseAnalytics.GooglePlayBase)
CreateResourceFromFile(Macro, FirebaseAnalytics.Firebase)
CreateResourceFromFile(Macro, FirebaseAuth.FirebaseAuth)



'************ Facebook Login ****************
CreateResource(values, facebook.xml, <resources>
    <string name="facebook_app_id">****************</string>
   </resources>)
 
AddApplicationText(
    <provider
            android:name="com.facebook.internal.FacebookInitProvider"
            android:authorities="${applicationId}.FacebookInitProvider"
            android:exported="false" />

        <receiver
            android:name="com.facebook.CurrentAccessTokenExpirationBroadcastReceiver"
            android:exported="false" >
            <intent-filter>
                <action android:name="com.facebook.sdk.ACTION_CURRENT_ACCESS_TOKEN_CHANGED" />
            </intent-filter>
        </receiver>
        <receiver
            android:name="com.facebook.AuthenticationTokenManager$CurrentAuthenticationTokenChangedBroadcastReceiver"
            android:exported="false" >
            <intent-filter>
                <action android:name="com.facebook.sdk.ACTION_CURRENT_AUTHENTICATION_TOKEN_CHANGED" />
            </intent-filter>
        </receiver>
      
         <activity
            android:name="com.facebook.FacebookActivity"
            android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
            android:theme="@style/com_facebook_activity_theme" />
        <activity android:name="com.facebook.CustomTabMainActivity" />
        <activity
            android:name="com.facebook.CustomTabActivity"
            android:exported="true"
             >
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />

                <data
                    android:host="cct.${applicationId}"
                    android:scheme="fbconnect" />
            </intent-filter>
        </activity>
)

'************ Facebook Login (end) **********

Erel · Nov 7, 2022

v2.01 released. It adds missing dependencies. The manifest snippet was also updated. Note that you need to replace two values: facebook app id and client token.

B4A Library Facebook - Extends FirebaseAuth to support Facebook

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