I want to create a Java FileDescriptor object on C!

There are too few related instructions.

It has been tried for a long time and cannot be called successfully.

AFileDescriptor_create(JNIEnv *env)

AFileDescriptor_getFd(JNIEnv *env, jobject fileDescriptor)

AFileDescriptor_setFd(JNIEnv *env, jobject fileDescriptor, int fd)

https://developer.android.com/ndk/reference/group/file-descriptor