How do you Install a java file onto an android tablet? Or how do I Convert a java file to a apk file?
Contact UpOnTek at http://www.upontek.com/ContactUs.php . They will help you with the conversion of java file to a .apk file. You sign an agreement, sent them the .jar file and, they will convert it, you will make a payment and they will send you back the converted file.
