The connection to adb is down, and a severe error has occured.

运行android程序控制台输出
[2013-06-25 11:10:32 - MyWellnessTracker] The connection to adb is down, and a severe error has occured.
[2013-06-25 11:10:32 - MyWellnessTracker] You must restart adb and Eclipse.
[2013-06-25 11:10:32 - MyWellnessTracker] Please ensure that adb is correctly located at 'E:\SDK\platform-tools\adb.exe' and can be executed.

解决方法一：

 关闭Esclipse和模拟器，进入命令行DOC，重启adb：

 adb kill-server

 adb start-server

解决方法二：

 进入DDMS中，Reset adb，就可以了