java中的getPartActionList方法应该是静态的还是非静态的？

Question

这是我的代码，我想使用多态但是 getPartActionList 是静态的，我不使用多态性。 此方法返回参数名称 PartAction 类，它对所有对象的行为都相同。 getPartActionList 方法在我的代码中应该是静态的还是非静态的？ 请帮我。 很抱歉写得不好。

public class PartAction extends BaseAction {

    private String address;
    private String brand;
    private String part_human;

    public static List<String> getPartActionList() {

        List<String> list = new ArrayList<>();
        list.add("addressName");
        list.add("brandName");
        list.add("partHumanName");
        return list;

    }

switch (categoryEnums) {

        case MAIN_CATEGORY:
            recyclerViewCategory.setAdapter(new CategoryAdapter(getContext(),getMainCategory(), statusFragment, childFragmentManager));
            break;

        case BUY_CATEGORY:
            recyclerViewCategory.setAdapter(new SubcategoryAdapter(getContext(), BuyAction.getBuyActionList(), statusFragment, childFragmentManager,action));
            break;

        case HUMAN_CATEGORY:
            recyclerViewCategory.setAdapter(new SubcategoryAdapter(getContext(), HumanAction.getHumanActionList(), statusFragment, childFragmentManager,action));
            break;

        case HUMAN_SUBCATEGORY_1:
            recyclerViewCategory.setAdapter(new SubcategoryAdapter(getContext(), HumanAction.getSubCategoryHumanList(), statusFragment, childFragmentManager,action));
            break;

        case HUMAN_SUBCATEGORY_2:
            recyclerViewCategory.setAdapter(new SubcategoryAdapter(getContext(), HumanAction.getSecondSubCategoryHumanList(), statusFragment, childFragmentManager,action));
            break;

        case SERVICE_CATEGORY:
            recyclerViewCategory.setAdapter(new SubcategoryAdapter(getContext(), ServiceAction.getServiceActionList(), statusFragment, childFragmentManager,action));
            break;

        case TRANSPORT_CATEGORY:
            FragmentTransaction fragmentTransaction = childFragmentManager.beginTransaction();
            fragmentTransaction.add(R.id.framLayout_child_category, new HomeFragment("حمل و نقل", action));
            fragmentTransaction.addToBackStack(null).commit();
            break;

        case REPAIRS_CATEGORY:
            recyclerViewCategory.setAdapter(new SubcategoryAdapter(getContext(), RepairAction.getRepairActionList(), statusFragment, childFragmentManager,action));
            break;

        case PARTS_CATEGORY:
            recyclerViewCategory.setAdapter(new SubcategoryAdapter(getContext(), PartAction.getPartActionList(), statusFragment, childFragmentManager,action));
            break;

Answer 1

您似乎总是在已经有操作的上下文中使用getPartActionList 方法：

recyclerViewCategory.setAdapter(new SubcategoryAdapter(getContext(), PartAction.getPartActionList(), statusFragment, childFragmentManager,action));

这意味着您需要确保您使用的类（本例中为PartAction）与action 的类匹配。

如果您创建一个getActionList 方法并将其作为抽象方法放在BaseAction 类中，如下所示：

abstract class BaseAction {
   public abstract List<String> getActionList();
}

那么你可以这样做：

recyclerViewCategory.setAdapter(new SubcategoryAdapter(getContext(), action.getActionList(), statusFragment, childFragmentManager, action));

如果 switch 语句的该分支处理的 Action 类型发生变化，您需要手动更改的事情就会减少。