The only slight difference between configuring Charles to work for physical devices and emulators, is the wifi network. Emulators only have 1 available wifi network. All other setup task are the same as for a real physical Android device
Android Wi-fi network
You will notice that there is only 1 wifi network
As your emulator is already running on your laptop it is just uses the same wifi network your laptop uses under the hood. This is the only thing to be aware of
Still having problems?
See common Android problems for more help