看到android的binder机制，有点不太理解。BP(binder proxy)和BN(binder native)是通过binder来通信的。Bp主要是用来处理java层传下来的服务请求。然后通过transact将处理请求传给bn（通过binder）。
请教各位大虾，这里BP和BN我有点不理解，为什么处理java层传下来的请求的部分叫做BP，我感觉应该叫做BN，谢谢。
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Q:What do "Bn*" and "Bp*" stand for in frameworks/base/include/utils/IInterface.h ?
I understand that "B" is for binder but what about "n" and "p"?
It seems like "p" may stand for "remote" and "n" for "native" but I would love a clarification.
A:"n" is native, that is the class you inherit from to implement the interface; "p" is proxy, that is the class that is created to perform interface calls through IPC.
http://groups.google.com/group/android-platform/browse_thread/thread/467bc0b5e858473f