[2015-03-18 14:28:12 - Test1] The connection to adb is down, and a severe error has occured. 方法1.cmd中adb kill-server，然后adb -startserver
方法2.方法1不管用，那么在任务管理器中杀死adb.exe，然后重启Eclipse。
The connection to adb is down, and a severe error has occured
原文：http://cbg23.blog.51cto.com/7201812/1621824