Android Question Touch-event for CustomView

Public Sub Initialize (vCallback As Object, vEventName As String)
[...]
  
    Dim R As Reflector
    R.Target=sv
    R.SetOnTouchListener("sv_Touch")
  
End Sub

Sub sv_Touch(ViewTag As Object, Action As Int, X As Float,Y As Float, Motionevent As Object) As Boolean
    If SubExists(CallBack, EventName & "_Touch") Then
        CallSub(CallBack, EventName & "_Touch")
    End If
    Return False
End Sub