how To handle When Multiple Android Connected

On this time Adb command  take Up the topic  how To handle connection When Multiple Android Connected
Ok Lets Learn ..

First See Device Connected With Command

See this how to Setup ADB

Adb Devices

List of devices attached
emulator-4567  device
1234567  device


Now. use adb -s serialno command to handle multiple device connected

adb -s emulator-4567 uninstall com.android.facebook

adb -s 1234567 install facebook.apk