You have tested your PhoneGap app. Created the apk and tested on device. Congratulations!! Now that you want to upload your app on Google Play, you need to get your apk ready for release. And here are the steps to do that.
Now that you have your mobile application ready and running on Phonegap app, the next step would be to try them out on actual devices. To do that, for Android you would need to get your apk ready. This article will act as a step by step guide to accomplish exactly that on Ubuntu.