hi, 1- what is the Eclipse version you used ? is it ok if i use Eclipse neon? i think it's the last version, i downloaded it from the official website. Or, I should use the Eclipse which uploaded in Buildbox website? 2- because i have problems in APK i don't know it, the problem is : if anyone downloads my APK to any device, it's will not open, the message is: "Unfortunately, " my app name" has stopped. any solution? tips? etc 3- can i export APK via android studio? is it better than Eclipse ? ??