So I\'m running Ubuntu 13.04 and for the past many hours I\'ve been trying to get eclipse (Eclipse Juno 4.2.2) to launch anything on my phone, or even just in the emulator,
Make sure your device is in USB debugging mode. Then, restart the adb server by the console, going through is path and typing:
adb kill-server
then
adb start-server
Restart Eclipse and usb connection (unplug, plug)
hope it helps, it Always helps me