Introduction of a Good article on Android Hal

From Linux driver to Hal and to Jni to Java, there is a basic understanding of HAL, in which the design of hw_module_t is very ingenious, each module will have its own specific function, and HAL is not known, So HAL provides an open function, this function can get hw_device_t, in fact, this structure and each module structure is beginning to align, the general practice is to hw_deivce_t as a module of the structure of the first variable, This guarantees the start of alignment, and in JNI, only a pointer cast is required.

Links to Good articles: http://blog.csdn.net/luoshengyang/article/details/6567257

Introduction of a Good article on Android Hal