Hello!

If all that you want is a workable APK file to install on your device and maybe a couple of others, you shouldn't need to use Processing's Export Android Project function. When you run the sketch on your device, the APK file is automatically created and will work properly on another device... if you can find it. Most likely, you will not be able to find it. In which case, you can compile it externally...

...ideally, using Eclipse, as this is (in my opinion, at least), by far the easiest way to do this. You simply add the exported project folder to Eclipse and export it from there. The resulting APK is compiled and signed (if you told Eclipse to sign it in the dialog) and can be uploaded to Google Play without any problems. Then again, you may not have Eclipse (and the Android ADT for Eclipse) installed. I would highly recommend having it simply as a development tool, seeing as you can use time and time again to build more and more apps.

Lastly, if you don't have Eclipse and don't want to get it, you'll need to build the project on your own, in the command line. This can be done, but it is far from ideal, especially if you want to do it several times. There are several tutorials already and the process is fairly complicated, so I'm not going to try to explain it here...

Two ways I have found to do it...y ou may need a rooted device?