One problem I got.
And you won't enjoy my solution !
Instead a TabPane now I have a B4XView Pane on main. There in I load different layouts. But on start I have to load some data into components on the other layouts. And I need access to every component from every layout.
Now I made 11 B4XViews, invisible, load the layouts, on click the menue button I will display the corresponding pane.
It works, but ..?
Another way - go back to TabPane, place an ImageView over the TabStripes and select the Tab per Code. Don't know if possible.