Android Eclipse Device-Free problem Resolution

Today run the program found eclipse under device without equipment, obviously remember last week appeared this issue, and has been resolved, this again appeared, and also forgot how to solve the past, it seems to be written down, convenient access;

This issue check online, some say is the ADB restart, but can not solve my problem, see the ADB version of the reply, I think, I this SDK has been upgraded, there may be such problems, so switch to the previous

Back up the SDK, immediately ...

So I do not see the device that appears, is the SDK upgrade, appeared, written here, to facilitate the resolution of the problem;

Android Eclipse Device-Free problem Resolution