Android Question PRoblem with Encryption lib

[Priamo]

Hello,

i use a lib in object in one my project. It's works fine, but on little cell Samsung with android ver 1.2... got a problem. During the activity create event, i read same data from a db for recognized the device. This data are saved at the first launch of the app. In the next restarts, the app read this data and run the encoded function of the lib.
But after the third string the app close itself without log an error.
this is my code:

    Sub Activity_Create(FirstTime AsBoolean)
    Activity.LoadLayout("Main")
    If FirstTime Then
        Dim a As String = EncodeData("MyProject")
        Dim b As String = EncodeData(AppVers)
        Dim dataOggi As String = EncodeData(DateTime.Date(DateTime.Now))
        Dim c As String = EncodeData(OS.Serial)
        Dim d As String = EncodeData(phe.Model)
        Dim e As String = EncodeData(OS.Release)
        Dim f As String = EncodeData(phe.Manufacturer)
        Dim g As String = EncodeData(lv1.Width & "x" & lv1.Height)
        Dim h As String = EncodeData("Send")
   enf if
   end sub
 
Sub EncodeData(dato AsString) AsString
    If dato<>""Then
        ReturnB64.EncodeStoS(dato, "UTF8")
    Else
       Return""
    End If
End Sub

On dataOggi i have the problem, if i delete dataOggi, the problem is on c etc.

I hope in your help.
Thanks to everybody.

 

[Priamo]

        Dim c As String = EncodeData(OS.Serial)

The problem is on the construct OS.Serial.

Now
The problem is on the construct OS.Serial.
Now I can not catch the error, the app exit without error.
How can i do?

Thanks.

 

[Erel]

I do not know how OS.Serial is implemented. However you can use PhoneId instead. Or: Android Device Unique ID - Alternative to PhoneId

 

[Priamo]

I do not know how OS.Serial is implemented. However you can use PhoneId instead. Or: Android Device Unique ID - Alternative to PhoneId

Thanks erel, you saved me
However, implemented os.serial so:

    Dim OS As OperatingSystem
    OS.Initialize ("OS")

In the previous piece of code I had omitted for brevity.

thanks a lot