I forgot to post this link [1] which Om provide me. It explains what actually should be done in order to add Tabs using TabBar.
[1] http://codepen.io/anon/pen/BNOVvw Piotr ----- Apache Flex PMC piotrzarzyck...@gmail.com -- View this message in context: http://apache-flex-development.2333347.n4.nabble.com/FlexJS-MDL-Add-Remove-item-s-to-TabBar-tp59508p59881.html Sent from the Apache Flex Development mailing list archive at Nabble.com.