you should export your game with appmobi or CocoonJS, and submit them the exported archive.
Then they will create the APK for you.
I actually use CocoonJS and the process is :
* Export as CocoonJS
* Declare your project on CocoonJS cloud
* Submit your generated archive file
* Ludei will send you a mail with the link to your compiled apk
* Sign and zipalign your APK
* Submit it to Google Play Store