Android Question Loop Scroll in xCustomListView ?

Sub Globals
   Private clv1 As CustomListView
   Private clv2 As CustomListView
   Private Label1 As B4XView
   Private CheckBox1 As B4XView
   Private xui As XUI
   Private jSV As JavaObject
End Sub

Sub Activity_Create(FirstTime As Boolean)
   Activity.LoadLayout("1")
   For x = 1 To 3
       For i = 1 To 10
           clv1.AddTextItem("Item #" & i, "")
       Next
   Next
   Dim jSV As JavaObject = clv1.sv
   jSV.RunMethod("setVerticalScrollBarEnabled", Array(False))

End Sub

Sub clv1_VisibleRangeChanged (FirstIndex As Int, LastIndex As Int)
   Log(FirstIndex)
   Dim RealSize As Int = Round(clv1.Size / 3)
   If FirstIndex < RealSize Then
       StopScroll
       clv1.SetScrollViewOffset(clv1.GetScrollViewOffset + clv1.GetScrollViewContentSize /  3)
   else if FirstIndex >= RealSize * 2 Then
       StopScroll
       clv1.SetScrollViewOffset(clv1.GetScrollViewOffset - clv1.GetScrollViewContentSize /  3)
   End If
End Sub

Private Sub StopScroll
   jSV.RunMethod("smoothScrollBy", Array(0, 0))
End Sub