Android Question RandomAccessFile Boolean

[jaraiza]

Hi,

I need to store the last Checked status from a radioButton. The easiest way to do it was to save a Boolean variable but it seems it's not supported by RandomAccessFile lib.

I tried to use WriteObject to save the boolean value, but after a successfully save when I use ReadObject I get this error: java.lang.NegativeArraySizeException: -1

Do I need to use a string equivalent or something? Like saving "true" or "false" ?

Thanks

 

[sorex]

you can always cast it to another type

Dim b As Boolean
Dim t As String
t=b
Log(t)

why not use StateManager to store form and other settings?

 

[KZero]

to save

  Dim sVal As String
If Radiobutton1.Checked=True Then sVal ="1" Else sVal="0"
File.WriteString(File.DirInternal,"filename.txt",sVal)

to load

Dim sval As String
sval = File.ReadString(File.DirInternal,"filename.txt")
If sval="1" Then Radiobutton1.Checked=True Else Radiobutton1.Checked=False

 

[jaraiza]

to save

  Dim sVal As String
If Radiobutton1.Checked=True Then sVal ="1" Else sVal="0"
File.WriteString(File.DirInternal,"filename.txt",sVal)

to load

Dim sval As String
sval = File.ReadString(File.DirInternal,"filename.txt")
If sval="1" Then Radiobutton1.Checked=True Else Radiobutton1.Checked=False

Yeah, that was exactly what I meant with using the string equivalent "true" instead of boolean true.

The problem is RandomAccessFile doesn't support strings. Well, I'll cast to another type.

Thanks!

 

[jaraiza]

you can always cast it to another type

Dim b As Boolean
Dim t As String
t=b
Log(t)

why not use StateManager to store form and other settings?

Because I don't feel comfortable using space I won't need, I just need to write 1 or 2 variables.

 

[sorex]

I think it wouldn't hurt to check out StateManager as it's very easy to use (just putsetting(settingname,value) and getsetting(settingname)) and you'll need it soon anyway in another project.

 

[Erel]

I tried to use WriteObject to save the boolean value, but after a successfully save when I use ReadObject I get this error: java.lang.NegativeArraySizeException: -1

Post your code. RandomAccessFile supports boolean (as well as strings and almost all other non-UI types).

 

[jaraiza]

Well, something funny has just happened

As I've already changed my code to use "byte" type (and it was already working), I rewrote the code to use objects again to check the error so I can post it.

And... Now it works. I suppose I did something wrong before

Just to leave the working code here:

----------------
I've 2 radiobuttons in the designer, "rdTOK_SI" and "rdTOK_NO" (inside a panel named "pnl_rdTOK"), mutually exclusive. Also there is a button named "btnOK".

Sub Globals
    Dim rConfig As RandomAccessFile
    Dim rdTOK_Val As Boolean
    Dim readVar As Boolean = True
    Dim DummyStatus As String

    Private pnl_rdTOK As Panel
    Private rdTOK_SI As RadioButton
    Private rdTOK_NO As RadioButton
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("Opts")
   
    rConfig.Initialize(File.DirInternal,"MyCFG.dat",True)
    Try
        rdTOK_Val = rConfig.ReadObject(rConfig.CurrentPosition)
    Catch
        readVar = False
    End Try

    If readVar Then
        rdTOK_SI.Checked = rdTOK_Val
        rdTOK_NO.Checked = Not(rdTOK_Val)
    End If
    rConfig.Close
End Sub

Sub btnOK_Click
    rConfig.Initialize(File.DirInternal,"MyCFG.dat",False)
    rConfig.WriteObject(rdTOK_SI.Checked,True,rConfig.CurrentPosition)
    rConfig.Close
    Activity.Finish
End Sub

Thanks anyway