1. buffer_handle_t
文件位置：system\core\include\system\window.h
typedef const native_handle_t* buffer_handle_t;
2. native_handle_t
文件位置：system\core\include\cutils\native_handle.h
typedef struct native_handle
{
int version; /* sizeof(native_handle_t) */
int numFds; /* number of file-descriptors at &data[0] */
int numInts; /* number of ints at &data[numFds] */
int data[0]; /* numFds + numInts ints */
} native_handle_t;