I have installed Android Studio v0.1 on Mac. My project imported and built successfully. AVD shows up whenever I run or debug the project, even though my device is connected
// the very First time it will always selected only emulator options
you need to change it in Create Run Configuration... in that General Tab select Target Device
Visual aid to @Padma Kumar's answer.
"Android Studio is not starting from Device", "Force to start Android Studio from Device"