Android Question B4xpagesmanager error

[djmainero]

Hello!

I'm getting this error informed on firebase crashlytics, i can't reproduce it, so I don't know how to fix it or where's the problem.

Fatal Exception: java.lang.NullPointerException: Attempt to read from field 'java.lang.Object com.empresa.appname.b4xpagesmanager$_b4xpageinfo.B4XPage' on a null object reference
       at com.empresa.appname.b4xpagesmanager._getpage(b4xpagesmanager.java:575)
       at com.empresa.appname.b4xpages._getpage(b4xpages.java:75)
       at com.empresa.appname.b4xmainpage$ResumableSub_B4XPage_Created.resume(b4xmainpage.java:279)
       at com.empresa.appname.b4xmainpage._b4xpage_created(b4xmainpage.java:184)
       at java.lang.reflect.Method.invoke(Method.java)
       at anywheresoftware.b4a.BA.raiseEvent2(BA.java:213)
       at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:1082)
       at anywheresoftware.b4a.keywords.Common.CallSubNew2(Common.java:1037)
       at com.empresa.appname.b4xpagesmanager._createpageifneeded(b4xpagesmanager.java:532)
       at com.empresa.appname.b4xpagesmanager._showpage(b4xpagesmanager.java:869)
       at com.empresa.appname.b4xpagesmanager._addpage(b4xpagesmanager.java:209)
       at com.empresa.appname.b4xpagesmanager._addpageandcreate(b4xpagesmanager.java:216)
       at com.empresa.appname.b4xpagesmanager._initialize(b4xpagesmanager.java:720)
       at com.empresa.appname.main._activity_create(main.java:378)
       at java.lang.reflect.Method.invoke(Method.java)
       at anywheresoftware.b4a.BA.raiseEvent2(BA.java:213)
       at com.empresa.appname.main.afterFirstLayout(main.java:105)
       at com.empresa.appname.main.access$000(main.java:17)
       at com.empresa.appname.main$WaitForLayout.run(main.java:83)
       at android.os.Handler.handleCallback(Handler.java:739)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:148)
       at android.app.ActivityThread.main(ActivityThread.java:5421)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Thanks!!

 

[Erel]

Make sure to add all pages in B4XPage_Created of B4XMainPage.

 

[djmainero]

Thanks for replying!

All pages are being created in B4XMainPage

 

[Erel]

Can you post the full code in B4XPage_Created of B4XMainPage?

 

[djmainero]

Of course, here's

If Glo.CrearPages Then
        Glo.CrearPages = False
        
        Home.Initialize
        B4XPages.AddPageAndCreate("Home", Home)
    
        ListadoDeudaPage.Initialize
        B4XPages.AddPageAndCreate("ListadoDeudaPage", ListadoDeudaPage)
    
        GuiaPage.Initialize
        B4XPages.AddPageAndCreate("GuiaPage", GuiaPage)
    
        ConsumosPage.Initialize
        B4XPages.AddPageAndCreate("ConsumosPage", ConsumosPage)
    
        ReclamosPage.Initialize
        B4XPages.AddPageAndCreate("ReclamosPage", ReclamosPage)
    
        UsuariosPage.Initialize
        B4XPages.AddPageAndCreate("UsuariosPage", UsuariosPage)
        
        NotificacionesPage.Initialize
        B4XPages.AddPageAndCreate("NotificacionesPage", NotificacionesPage)
        
        AdherentesPage.Initialize
        B4XPages.AddPageAndCreate("AdherentesPage", AdherentesPage)
        
        FallecidosPage.Initialize
        B4XPages.AddPageAndCreate("FallecidosPage", FallecidosPage)
        
        ProblemaIniciarPage.Initialize
        B4XPages.AddPageAndCreate("ProblemaIniciarPage", ProblemaIniciarPage)
    Else
        Home = B4XPages.GetPage("Home")
        ListadoDeudaPage = B4XPages.GetPage("ListadoDeudaPage")
        GuiaPage = B4XPages.GetPage("GuiaPage")
        ConsumosPage = B4XPages.GetPage("ConsumosPage")
        ReclamosPage = B4XPages.GetPage("ReclamosPage")
        UsuariosPage = B4XPages.GetPage("UsuariosPage")
        NotificacionesPage = B4XPages.GetPage("NotificacionesPage")
        AdherentesPage = B4XPages.GetPage("AdherentesPage")
        FallecidosPage = B4XPages.GetPage("FallecidosPage")
        ProblemaIniciarPage = B4XPages.GetPage("ProblemaIniciarPage")
    End If
    B4XPages.GetManager.LogEvents = True

    Root = Root1
    Root.LoadLayout("LoginPage")
    If Glo.isDarkMode Then
        iLogoSys.SetBitmap(xui.LoadBitmapResize(File.DirAssets, "LogoMembreteB.png", iLogoSys.Width, iLogoSys.Height, True))
    End If
    'CheckUpdate
    
    SetStatusBarColor(xui.Color_ARGB(255, 63, 99, 171))
    ShowLoading
    CreaListaLogin
    
    #If B4A
    Private cd As ColorDrawable
    cd.Initialize(Colors.Transparent, 0)
    txtUsuario.Background = cd
    txtPass.Background = cd
    If Not(Glo.FondoCoop.IsInitialized) Then Glo.FondoCoop = xui.LoadBitmapResize(File.DirAssets, "fondocoop.jpg", 100%x, 100%y, True)
    #Else
    Glo.FondoCoop = xui.LoadBitmap(File.DirAssets, "fondocoop.jpg")
    #End If
    
    DateTime.DateFormat = "dd/MM/yyyy"   
    imgFondoHeader.SetBitmap(Glo.FondoCoop)
    Wait For (initDB) Complete(Result As Boolean)

    Try
        For Each Archivo As String In File.ListFiles(Glo.Provider.SharedFolder)
            If Archivo.EndsWith(".pdf") Then File.Delete(Glo.Provider.SharedFolder, Archivo)
        Next
    Catch
        Log(LastException)
    End Try
        
    Wait For (listaCoops) Complete(Finish As Boolean)
    #IF Coop
    listadoCooperativas.mBase.Visible = False
    #End If
    If Finish Then
        #IF Coop
        For i = 0 To listadoCooperativas.Size
            'Log(listadoCooperativas.GetItem(i)) 'Cooperativa de Gral. Coop
            If listadoCooperativas.GetItem(i).Contains("Coop") Then
                lblNombreApp.Text = listadoCooperativas.GetItem(i)
                setCoope(i)
                listadoCooperativas_SelectedIndexChanged(i)
                Exit
            End If
        Next
        #End If
    End If

Glo.CrearPages start always as True, and sets to False here only

Thanks!

 

[Erel]

Something is strange here. B4XPage_Created should run exactly once. Why is this condition needed?

 

[djmainero]

I think is a residual code that I left from a test that I did, ignore it.

(Sorry for the late response)

 

[Erel]

Based on the error message Glo.CrearPages = False and it will cause your app to crash.