cc_binary {             //编译成可执行文件，cc_library_shared编译成动态库
    name: "bt_test",    //编译出的可执行文件的名字为bt_test
    vendor: true,       //编译出来放在/vendor目录下(默认是放在/system目录下)
    srcs: ["bt_test.cpp"], //源文件，格式["a.cpp", "b.cpp"]
    cflags: [
        "-Wall",
        "-Werror",
        "-Wno-unused-parameter",
    ],                    //编译flag
    include_dirs: [
        "hardware/interfaces/halnode/1.0/default",    //用户值定的头文件查找路径
    ],
    shared_libs: [       //编译依赖的动态库
        "liblog",
        "libutils",
        "libhidltransport",
        "android.hardware.halnode@1.0",
        "libhidlbase",
        "libbase",
    ],
}