如何从 flutter 中的 class 中删除或禁用某些对象以在其他页面上使用它

Question

In my flutter app, I made a class to use it on other pages that have the same objects, but on other pages, not all those objects on it.

class ListItem extends StatelessWidget {
  const ListItem(
      {Key? key,
      required this.nu_image,
      required this.en_text,
      required this.ja_text,
      required this.ja_image,
      required this.sound,
      required this.color})
      : super(key: key);
  final String nu_image;
  final Color color;
  final String en_text;
  final String ja_text;
  final String ja_image;
  final String sound;

How can I remove or disable it to use it on other pages has those objects on it? for examble: "ja_image". Thanks in advance...

Answer 1

If I understand correctly you simply need a question mark? after data type like so final String? nu_image; final String? nu_image; . and remove the required keyword from the constructor. That way you can create instance of this class without all parameters needed.