Android Question Invalid Double when using GradientDrawable

Sub Item_RowContentFiller(RowID As Long, LayoutName As String, CellPanel As Panel, CellIndex As Byte, Position As Int)

    Dim gdTheGradientDrawable As GradientDrawable
    Dim arrColours(2) As Int

    arrColours(0) = Colors.DarkGray
    arrColours(1) = Colors.Black

    gdTheGradientDrawable.Initialize("TOP_BOTTOM", arrColours)

    If ULV.IsSelected(Position) Then
        'The selected rows are green
        CellPanel.Color = Colors.Green
    Else
        ' Set properties for the seperate lines that make up the list.
        '-------------------------------------------------------------
        'CellPanel.Color = Colors.White
        CellPanel.Color = gdTheGradientDrawable
    End If

    'Reads the data and sets the label text
    Dim lbl As Label = CellPanel.GetView(0) 'The first (and only) view of the cell is a label