Android Studio "ADB Not Responding"

Yesterday Android studio was fine, and today it's a problem to run again:

Started thinking that it was an SDK issue and changed the SDK to the SDK that came with Android Studio, but the problem still exists:

Click on the Android small icon below and intend to see the LogCat, the results see this:

Later on the Internet to find the solution, the original SDK port is occupied!

Workaround:

ADB run occupies port 5037, go to cmd window, run Netstat-aon|findstr "5037" (note space)

The 5037 port is occupied by the application of PID (process identifier) 4076! Just find it and end it.

PS: Display PID method

1. Task Manager--------Select the column, check the PID is OK!

Reference: http://vcsos.com/Article/pageSource/140816/20140816162242.shtml

Android Studio "ADB Not Responding"