Android Question Preferences Dialog change time in steps

Private Sub SetMinutesSelectorIntervalTo10Minutes(Key As String)
    Dim i As Int = p.PrefItems.IndexOf(p.GetPrefItem(Key))
    Dim pmMinutes As B4XPlusMinus = p.CustomListView1.GetPanel(i).GetView(1).Tag
    pmMinutes.SetNumericRange(0, 50, 10)
End Sub

Sub Button1_Click
    Dim rs As Object = p.ShowDialog(Data(0), "Ok", "CANCEL")
    SetMinutesSelectorIntervalTo10Minutes("time") 'this is the item "key"
    Wait For (rs) Complete (Result As Int)
    Log(Result)
End Sub