android 学习之路

1) android build system
   a) Makefile
      android 采用了makefile 来构成它的编译系统， 并且才用了分层的方式
     

Layer	Example	Description
Product	myProduct, myProduct_eu, myProduct_eu_fr, j2, sdk	The product layer defines a complete specification of a shipping product, defining which modules to build and how to configure them. You might offer a device in several different versions based on locale, for example, or on features such as a camera.
Device	myDevice, myDevice_eu, myDevice_eu_lite	The device layer represents the physical layer of plastic on the device. For example, North American devices probably include QWERTY keyboards whereas devices sold in France probably include AZERTY keyboards. Peripherals typically connect to the device layer.
Board	sardine, trout, goldfish	The board layer represents the bare schematics of a product. You may still connect peripherals to the board layer.
Arch	arm (arm5te) (arm6), x86, 68k	The arch layer describes the processor running on your board.

b) android make file 调用的分析





how to create a native service:



how to create a java service:
http://hi.baidu.com/xxw8393/blog/item/fa4ee495578243057af48034.html


AIDL function: