网络获取资料所得：
运行eclipse执行android应用，控制台报错：
The connection to adb is down, and a severe error has occured.
You must restart adb and Eclipse.
Please ensure that adb is correctly located at 'E:setupsandroidandroid-2.1_r01-windows oolsadb.exe' and can be executed.
关掉eclipse，查看任务管理器，关闭tabd.exe，重启即可