In Eclipse, my device not detected [duplicate]

Answer 1

Try Killing the adb server and restarting it thru command prompt

go to your android skd directory where ever you have kept it and traverse to adb.exe which you will find inside platform-tools..

May be this will help you. same happened with me many times. I just restart the server at that time

Answer 2

Edit ~/.android/adb_usb.ini (or if you are running as root, check /root/.android)
Add 0x1bbb to the end of the file if it already exists, otherwise do: echo 0x1bbb >> adb_usb.ini
adb kill-server
adb start-server
Check output of adb devices for your device