title: Debug android application directly from the device
body: <p>I'm trying to debug an android application through my Nexus 5,
  My computer wont detect the devices when I'm running the "adb  devices" commend from the cmd... 
  I'm getting the following message "List of devices attached" and then an empty line.
  i already have the recent USB drivers, my USB debugging option on my Nexus already on
  what should i do
  Thank you </p>