Android Question [Solved]Cannot serialize object

Johan Hormaza · Apr 17, 2022

Hello, I have a problem when sending a serialized object.
Here I attach the example.
Thank you

Johan Hormaza

William Lancee · Apr 17, 2022

I looked your project. It is far too complicated to decipher for me, and probably for many others.
You also didn't specify what your problem is.

Describe your problem and create a simple example project that shows the problem.
If you do that, then I and others will be willing to help.

Johan Hormaza · Apr 17, 2022

Johan Hormaza said:
problem when sending a serialized object.

This is the problem

William Lancee · Apr 17, 2022

What is the error message? What do or don't you see that you expected?
In what part of your code?

Marvel · Apr 17, 2022

The object you're trying to serialize, what does it contain? Does it contain a class? Not all object types can be serialised

William Lancee · Apr 17, 2022

Just guessing now. Maybe you have the same problem as HERE

We'll see when we're back in your time zone.

Johan Hormaza · Apr 17, 2022

Too bad, it was already quite late at night in my country.
What I want is to send a data packet via Bluetooth already serialized. This is where I send the package:

B4X:

Private Sub btnTransaction_Click
    Try
        Main.DatafonoPCL.WriteBytes(ser.ConvertObjectToBytes(DoTrans(DoTransaction))) 'problem is here
    Catch
        Log(LastException)
    End Try
End Sub

Private Sub DoTrans(DoTran As DoTransactionTask) As Object()
    Return Array(DoTran.transIn1,DoTran.transOut1)
End Sub

This is the package that contains an object of class TransactionIn and another TransactionOut. In which they already have their values.

B4X:

Type DoTransactionTask(transIn1 As TransactionIn, transOut1 As TransactionOut)
    Private DoTransaction As DoTransactionTask
    Private transIn As TransactionIn
    Private transOut As TransactionOut
    Private Sub B4XPage_Created (Root1 As B4XView)
    transOut.Initialize
    transOut.cAmount(0) = 0
    transOut.cNumAuto(0) = 0
    transOut.cCardEndValidityDate(0) = 0
    transOut.cCmc7(0) = 0
    transOut.cIso2(0) = 0
    transOut.cPan(0) = 0
    transOut.cCurrencyCode(0) = 0
    transOut.cC3Error(0) = 0
    transOut.cNumTerm(0) = 0
    transOut.cUserData1(0) = 0
    
    transIn.Initialize
    transIn.setAmount("20000")
    transIn.setCurrencyCode("978")
    transIn.setOperation("978")
    transIn.setTermNum("58")
    transIn.setAuthorizationType("2")
    transIn.setCtrlCheque("2")
    transIn.setUserData1("Johan Hormaza")
    
    DoTransaction.Initialize
    DoTransaction.transIn1 = transIn
    DoTransaction.transOut1 = transOut
    End Sub

William Lancee · Apr 17, 2022

No problem with the time difference, it trips me up all the time. Sometimes it seems that everybody is online all the time.

Serializer does not do arrays of objects ( HERE).

B4X:

Array(DoTran.transIn1,DoTran.transOut1)

Johan Hormaza · Apr 17, 2022

Before pressing the Transaction button you must first connect to a Bluetooth device

B4X:

Error occurred on line: 96 (B4XMainPage)
java.lang.RuntimeException: Cannot serialize object: [b4xcollections=null, b4xpages=null, camount=[B@fd2073b
, camount2=[B@d433e58, cautotype=[B@2b08bb1, ccashnum=[B@ba19896
, ccmc7=[B@a4fdc17, ccryptovad=[B@9d9e804, cctrlcheque=[B@d9131ed
, ccurrencycode=[B@e56a822, ccurrencycode2=[B@e6c22b3, ccustomerpresent=[B@f8070
, cdatefinvalidite=[B@65bffe9, cdateinitvalidite=[B@45b246e, cidentcheque=[B@afc370f
, ciso2=[B@ac4339c, cnumauto=[B@3ebb1a5, cnumcontexte=[B@619197a
, cnumdossier=[B@ccf352b, cnumticket=[B@aeed88, coperation=[B@60ac321
, coption=[B@68f5346, cpan=[B@489f907, creadertype=[B@b095a34
, ctendertype=[B@4af705d, ctermnum=[B@7dd5dd2, ctrnsnum=[B@e431ea3
, ctutorialmode=[B@afbe5a0, ctypefacture=[B@6f7b559, cuserdata1=[B@c8f851e
, cuserdata2=[B@6df01ff, ffu=[B@9c9bbcc, main=null
, starter=null]
    at anywheresoftware.b4a.randomaccessfile.B4XSerializator.writeType(B4XSerializator.java:275)
    at anywheresoftware.b4a.randomaccessfile.B4XSerializator.writeObject(B4XSerializator.java:241)
    at anywheresoftware.b4a.randomaccessfile.B4XSerializator.writeList(B4XSerializator.java:269)
    at anywheresoftware.b4a.randomaccessfile.B4XSerializator.writeObject(B4XSerializator.java:237)
    at anywheresoftware.b4a.randomaccessfile.B4XSerializator.WriteObject(B4XSerializator.java:121)
    at anywheresoftware.b4a.randomaccessfile.B4XSerializator.ConvertObjectToBytes(B4XSerializator.java:79)
    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:144)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:193)
    at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
    at android.view.View.performClick(View.java:7297)
    at android.view.View.performClickInternal(View.java:7274)
    at android.view.View.access$3600(View.java:819)
    at android.view.View$PerformClick.run(View.java:28017)
    at android.os.Handler.handleCallback(Handler.java:914)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:225)
    at android.app.ActivityThread.main(ActivityThread.java:7564)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
** Activity (main) Pause event (activity is not paused). **
** Service (starter) Destroy (ignored)**

Johan Hormaza · Apr 17, 2022

William Lancee said:
No problem with the time difference, it trips me up all the time. Sometimes it seems that everybody is online all the time.

Serializer does not do arrays of objects ( HERE).

B4X:

Array(DoTran.transIn1,DoTran.transOut1)

What do you mean?
If I use

Johan Hormaza · Apr 17, 2022

There is a Java library for Android that sends the Serialized package and so I try to do the same for B4X

William Lancee · Apr 17, 2022

You're right about Arrays of objects. But the objects in your case are class instances, aren't they?

agraham · Apr 17, 2022

You seem to be trying to serialize class instances of TransactionIn and ttransactionOut which I don't think B4XSerializator supports. It can only serialize certain types of objects. See the splash screen here

[B4X] Network + AsyncStreams + B4XSerializator

Better implementation, based on B4XPages: https://www.b4x.com/android/forum/threads/b4x-b4xpages-network-asyncstreams-b4xserializator.119011/#content New video tutorial: This is a simple and important example. It demonstrates several good practices related to network...

www.b4x.com

Johan Hormaza · Apr 17, 2022

William Lancee said:
You're right about Arrays of objects. But the objects in your case are class instances, aren't they?

Yes, but the Type DoTransactionTask object is a Type

Erel · Apr 17, 2022

Many posts but still not enough information to help you.
Based on the error message, which should have been posted in the first message, you are trying to serialize a class instance (maybe a page) which isn't supported.

Erel · Apr 17, 2022

You can serialize custom types but they cannot hold class intances.

Johan Hormaza · Apr 17, 2022

Erel said:
You can serialize custom types but they cannot hold class intances.

And what do you recommend I do with the TransactionIn and TransactionOut classes to be able to enter them into a Type DoTransactionTask (transIn1 As TransactionIn, transOut1 As TransactionOut)?

Johan Hormaza · Apr 17, 2022

agraham said:
You seem to be trying to serialize class instances of TransactionIn and ttransactionOut which I don't think B4XSerializator supports. It can only serialize certain types of objects. See the splash screen here

[B4X] Network + AsyncStreams + B4XSerializator

Better implementation, based on B4XPages: https://www.b4x.com/android/forum/threads/b4x-b4xpages-network-asyncstreams-b4xserializator.119011/#content New video tutorial: This is a simple and important example. It demonstrates several good practices related to network...

www.b4x.com

Thanks friend, I based myself precisely on this example ?

Erel · Apr 17, 2022

It depends on all kinds of things. Making them custom types is a good option.

Johan Hormaza · Apr 17, 2022

Erel said:
It depends on all kinds of things. Making them custom types is a good option.

Thanks Erel, you mean that they are not classes but Type? Something like that?

B4X:

    Type TransactionIn(...)
    Type TransactionOut(...)
    Type DoTransactionTask(transIn1 As TransactionIn, transOut1 As TransactionOut)

Android Question [Solved]Cannot serialize object

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