Android Question xTraViews Library - (DialogView) message is not transparent?

[T201016]

@Periklis Koutsogiannis

I have a question.
Can you build a similar message background as on the attached picture?
I tried with Colors.Transparent, but the background of the message is not transparent.

Sub BtnDialog1_Click
    Dim Dialog As DialogView

'Configure the message
    Dim MessageBackground As ColorDrawable : MessageBackground.Initialize(Colors.Transparent, ....)
    Dialog.Options.Elements.Message.Set(....)

    ....