Android Question Facebook login

S

Stefano Di Chiano

Active Member
Licensed User
I'm implementing Facebook login via FirebaseAuth.
The main problem is that after I sign in (successfully) the app crash.
The secondary problem is that when I was using B4A Bridge the logs didn't show.
I tried with an emulator and I got the following error:
Logger connesso a: emulator-5554
--------- beginning of /dev/log/system
--------- beginning of /dev/log/main
Copying updated assets files (1)
*** Service (starter) Create ***
** Service (starter) Start **
onAuthStateChanged: com.google.firebase.auth.internal.zzl@4e82a120
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Facebook - SignIn
** Activity (main) Pause, UserClosed = false **
sending message to waiting queue (OnActivityResult)
running waiting messages (1)
Facebook - ResultArrived: Intent { (has extras) }
Facebook success: com.facebook.login.LoginResult@4e996dc0
signInWithCredential start
** Activity (main) Resume **
onAuthStateChanged: com.google.firebase.auth.internal.zzl@4e82a120
SignedIn: Stefano Di Chiano
AKXb0iY01ORBY88qFdYap3kvBlP2
Error occurred on line: 41 (Starter)
java.lang.NullPointerException
at anywheresoftware.b4a.BA.addLogPrefix(BA.java:587)
at anywheresoftware.b4a.keywords.Common.LogImpl(Common.java:191)
at b4a.logintest.starter._auth_signedin(starter.java:162)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
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.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
at anywheresoftware.b4a.BA$2.run(BA.java:370)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5021)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)
at dalvik.system.NativeStart.main(Native Method)
signInWithCredential complete: true
On line 41 of the starter service there is just: Log(User.Email).
I'm using B4A version 9.80.
If needed, this is my manifest:
'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: https://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="9" android:targetSdkVersion="28"/>
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
CreateResourceFromFile(Macro, Themes.DarkTheme)
'End of default text.
CreateResourceFromFile(Macro, FirebaseAnalytics.GooglePlayBase)
CreateResourceFromFile(Macro, FirebaseAnalytics.Firebase)
CreateResourceFromFile(Macro, FirebaseAuth.FirebaseAuth)
'************ Facebook Login ****************
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"/>)
'************ Facebook Login (end) **********
CreateResource(values, facebook.xml, <resources>
<string name="facebook_app_id">509085083330445</string>
</resources>)
 
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S

Stefano Di Chiano

Active Member
Licensed User
Ok, sorry. I used spoilers to not make it too long.
Anyway, this is the code:
Auth_SignedIn: 
Sub Auth_SignedIn (User As FirebaseUser)
    Log("SignedIn: " & User.DisplayName)
    CallSub(Main, "SetState")
    Log(User.Uid)
    Log(User.Email)
End Sub
Line 41 is:
Line 41: 
Log(User.Email)
The SetState used in Auth_SignedIn is:
SetState: 
Sub SetState
    If Starter.auth.CurrentUser.IsInitialized Then
        Dim cu As FirebaseUser = Starter.auth.CurrentUser
        lblName.Text = "Hello: " & cu.DisplayName
    End If
    For Each btn As Button In Array (btnSignInFacebook, btnSignInGoogle)
        btn.Enabled = Not(Starter.auth.CurrentUser.IsInitialized)
    Next
    btnSignOut.Enabled = Starter.auth.CurrentUser.IsInitialized
End Sub
This is all from the facebook example on the tutorial.
 
Upvote 0
S

Stefano Di Chiano

Active Member
Licensed User
It didn't fix the issue completely.
On the emulator it works fine now, but if using B4A Bridge the app still crash after signing in with facebook.
 
Upvote 0
S

Stefano Di Chiano

Active Member
Licensed User
I switched to USB mode and it works well without errors.
It only crash when I sign in with Facebook using B4A Bridge.
It works perfectly both in USB mode and with android emulators.
 
Upvote 0
S

Stefano Di Chiano

Active Member
Licensed User
You are actually right. I don't know what happened but this morning I run it again and it worked perfectly even with B4A Bridge.
Could it have been a network problem?
 
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