With Android studio, write java code and by converting options, you can get converted equalent kotlin code..
See this link.
According to my knowledge, some language supports running other language code via some native methods...
C code can run on c++, Java can be run on python by jpython, R can can run on python, java have supported, and supports most programs..
Kotlin is introduced as to provide alternatives which have difficulties in java. So most programs write in java can be supported to run on kotlin..
Infact I think it easy by some IDE...