AFAIK there is no means to convert a B4A layout into a B4i layout, you need to do it on your own.
The oprating systems are not the same, which means that there are views existing in one operating system but not in the other and vice and versa.
Then you may have the problem that a same layout is accepted by B4A users but not necessarily by B4i users. B4A users don't have the same feeling than B4i users and this also vice and versa.
Probably, B4X XUI, will become a solution, but still with the product feeling problem.