在手机上测试的时候遇到错误：
Couldn't register com.gaohf.notify with the bootstrap server. Error: unkNown error code.
This generally means that another instance of this process was already running or is hung in the debugger.
解决：
将手机重启一下即可。 转载：http://blog.csdn.net/rhljiayou/article/details/7918490
