在手機上測試的時候遇到錯誤：
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.
解決：將手機重啓一下即可。轉載：http://blog.csdn.net/rhljiayou/article/details/7918490