运行Android程序出错：The connection to adb is down, and a severe error has occured

调试Android程序时候，报错如下：

[2013-02-21 15:41:06 - MainActivity] ------------------------------
[2013-02-21 15:41:06 - MainActivity] Android Launch!
[2013-02-21 15:41:06 - MainActivity] The connection to adb is down, and a severe error has occured.
[2013-02-21 15:41:06 - MainActivity] You must restart adb and Eclipse.
[2013-02-21 15:41:06 - MainActivity] Please ensure that adb is correctly located at 'D:adt-bundle-windows-x86_64sdk\platform-tools\adb.exe' and can be executed.

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原因是 我安装了91手机助手， 这个程序自动启动，监听手机连接，手机用usb线已连接，它就监听这个手机了。 这个“动作” 会导致这个问题。具体原因不详。

参考链接：

http://my.eoe.cn/sunxun/archive/919.html

http://www.crifan.com/android_adt_the_connection_to_adb_is_down__and_a_severe_error_has_occured/

http://logger.iteye.com/blog/911977

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最近又出现问题， 某些时候连不上设备，但是重启机器就好了。

发现：qq有个进程叫做 tadb.exe,干掉他，重启eclipse即可。

如何发现这个进程的呢，请参见：

http://hi.baidu.com/z_shaoxuan/item/c410af57cb7bab04e6c4a505