Q:

Connected device is a device or an emulator

I have a device that is connected to my PC.  Is it possible to know this device is real phone or emulator using adb?  If it is possible then how can i do it?  Google and documentation didn't solve my problem. 

A:

You can use adb get-serialno to obtain the serial number of the device.  On the emulator the serial number starts with emulator-.