I\'m attempting to transition from Eclipse to Android Studio today. I generated the Gradle build files in Eclipse and imported into Android Studio. I changed my preferences
If you have an LG G3
I've seen a couple of posts about people having issues connecting their LG G3 to adb...major PITA because the solution is very non-intuitive.
Turns out you need to switch the USB mode to Send Images (PTP). You can find this menu by clicking on the notification item that says "Tap for more USB options" right after plugging your phone in.
More info: http://forum.xda-developers.com/lg-g3/general/guide-connecting-lg-g3-to-linux-adb-aka-t2821673