Android Question Image Overlay - Two layouts or panels?

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.
   Private iv As ImageView
   Private p As Panel
   Private pState As Int = 0 'panel visible or not
   Private bt As Button

End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")
   iv.Initialize("iv")
   Activity.AddView(iv,0,0,100%x,100%y)
   Dim b As Bitmap
   b.Initialize(File.DirAssets,"1.png")
   iv.Bitmap=b

   p.Initialize("panel")
   Activity.AddView(p,-100dip, 0, 100dip,100dip)
   Dim cd As ColorDrawable
   cd.Initialize(Colors.ARGB(100, 255,0,0), 0)
   p.Background = cd
   bt.Initialize("Button")
   p.AddView(bt, 20dip,20dip, 60dip,60dip)
End Sub

Sub iv_Click
    If pState = 0 Then
      p.SetLayoutAnimated(100, 0,0 , 100dip,100dip)
      pState = 1
    Else
      p.SetLayoutAnimated(100, -100dip,0 , 100dip,100dip)
      pState = 0     
    End If
End Sub

Sub button_click
    Log("Button click")
End Sub