廢話不多說,直接上程式碼

List<User> list = new ArrayList<>();

        for (int i = 0; i < 10; i++) {
            User user = new User();
            user.id = i + "";
            list.add(user);
        }

        Observable.from(list)
                .subscribe(new Action1<User>() {
                    @Override
                    public
 
 void call(User user) {
                        System.out.println("MainActivity.call=" + user.id);
                    }
                });