Android Question StateListDrawable not work with B4XView assign to Button

[dws]

I have a sub like this. But the StateListDrawable not affect ... What is Wrong

Sub AddButton
    ' Panel to host more than one buttons '
    Dim p As Panel = xui.CreatePanel("")
    p.SetLayoutAnimated(0, 0, 0, 40dip, 40dip)

    ' First button'
    Dim b As Button
    b.Initialize("MyButton")
    b.Text = "Button1"

    ' Colors for button state list'
    ' Enabled '
    Dim gdEnable As GradientDrawable, clrEnable(2) As Int
    clrEnable(0) = Colors.White
    clrEnable(1) = Colors.LightGray
    gdEnable.Initialize("TOP_BOTTOM", clrEnable)
    ' Disabled '
    Dim gdDisable As GradientDrawable, clrDisable(2) As Int
    clrDisable(0) = Colors.DarkGray
    clrDisable(1) = Colors.LightGray
    gdDisable.Initialize("TOP_BOTTOM", clrDisable)
    'Pressed'
    Dim gdPressed As GradientDrawable, clrPressed(2) As Int
    clrPressed(0) = Colors.Green
    clrPressed(1) = Colors.Yellow
    gdPressed.Initialize("TOP_BOTTOM", clrPressed)
   
   ' Final StateListDrawable'
    Dim std As StateListDrawable
    std.Initialize
    std.AddState2(Array As Int(std.State_enabled),     gEnabled)
    std.AddState2(Array As Int(std.State_Disabled),    gDisable)
    std.AddState2(Array As Int(std.State_Pressed),     gPress)
    std.AddCatchAllState(gEnabled)

    ' Add statelistdrawable to button.background '
    b.Background = std

    ' This in sub Global '
    Dim BtnB4x as B4XView

    ' Assign button to B4XView '
    BtnB4x = b
    BtnB4x.TextColor = Colors.Black
    BtnB4x.TextSize = 16
    BtnB4x.Visible = True
   
    ' Add B4XView button to panel '
    p.AddView(BtnB4x,0,0,0,0)
   
    BtnB4x.SetLayoutAnimated(0,0,100%x,100%y)

End sub

 

[Erel]

Best if you create a small example and upload it.