Please note that there are many devices not having the playStore in their ROMs. I would suggest placing b4a-bridge in b4a's distribution setup file. It's a very valuable tool, since, again, not all devices are coming with suitable adb driver.
When I tried that I got the message "You don't have any devices." Googling this shows that I am not alone in this, and gives lots of advice, none of which has worked so far.
I'll keep soldiering on... Sometimes I wonder why everything is so difficult.