Android Question Problem with array of Panels

[paolofi]

I tried to use Panels array to create panels grid but I receive an error when try to retrieve the tag id:

java.lang.RuntimeException: Object should first be initialized (Panel).

Sub Globals
    Dim ImgPanel(12) As Panel
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Dim r As Int
    Dim c As Int
    Dim sx As Int
    Dim sxInc As Int
    Dim a As Int
    Dim aInc As Int
    r=0
    c=0

    For i = 0 To ImgPanel.Length - 1
        Dim p As Panel
        p.Initialize("ImgPanel")
        Activity.AddView(p, sx+(c*sxInc), a+(r*aInc), 130dip, 130dip) 'add the panel to the layout

        p.Tag=i
     
        ImgPanel(i)=p
     
        c=c+1

        If c>3 Then
            r=r+1
            c=0
        End If
    Next
End Sub

Sub ImgPanel_Click
    'Using Sender we find the panel that raised this event
    Dim p As Panel
    Dim Id As Int

    p = Sender
    Id=p.Tag '**** HERE I RECEIVE THE ERROR: java.lang.RuntimeException: Object should first be initialized (Panel).

End Sub

Some suggest?

Thanks in advance

Lenny

 

[vampirbcn]

Try this change:

p.Initialize("ImgPanel")
p.Tag=i  ' Before Activity.AddView
Activity.AddView(p, sx+(c*sxInc), a+(r*aInc), 130dip, 130dip) 'add the panel to the layout

 

[Erel]

This is might be related to a debugger bug in v2.71. Make sure that you do not put a breakpoint before the line: p = Sender.
This will reset the Sender to a Null value.

 

[paolofi]

Try this change:

p.Initialize("ImgPanel")
p.Tag=i  ' Before Activity.AddView
Activity.AddView(p, sx+(c*sxInc), a+(r*aInc), 130dip, 130dip) 'add the panel to the layout

Now its seems to work!

Many thanks!

Lenny

 

[vampirbcn]

Remember, it is important to assign the values before adding control.

Best regards


*Sorry for my bad English

 

[paolofi]

This is might be related to a debugger bug in v2.71. Make sure that you do not put a breakpoint before the line: p = Sender.
This will reset the Sender to a Null value.

Good to know.

Regards.

 

[mr23]

Just ran across this "do not put a breakpoint before the line: p = Sender" in 3.8.
Does this warrant a new thread, Erel?

 

[Erel]

This issue was fixed long ago. It will only happen if you handle the WindowFocusChanged event. In that case it is expected to happen as the debugger dialog causes the focus to change.