Android Question button size became larger after I set its border

'Set the style of a button
'chosen=True: style2 when button is chosen。 || chosen=False: style1 when button is not chosen
private Sub SetButtonStyle(button As B4XView, chosen As Boolean)
    Private sld As StateListDrawable
    
    Private cd1,cd2 As ColorDrawable
    cd1.Initialize2(Colors.Gray,0,0,Colors.Transparent) 'style1
    cd2.Initialize2(Colors.White,0,1dip,Colors.Black)  'style2
    
    If chosen=True Then
        sld.Initialize
        sld.AddState(sld.State_Enabled,cd2)
        button.As(Button).Background=sld
    Else
        sld.Initialize
        sld.AddState(sld.State_Enabled,cd1)
        button.As(Button).Background=sld
        
    End If

End Sub