如何以编程方式创建 Menu 实例?即在 onCreateOptionsMenu 之外膨胀菜单 [英] How to create a Menu instance programmatically? i.e. inflate a Menu outside onCreateOptionsMenu

问题描述

我想在外部 onCreateOptionsMenu 方法(这意味着在用户不按下按钮时创建/显示菜单)膨胀一个菜单对象，所以我需要创建一个菜单实例以将其传递给 inflate 方法.

I want to inflate a menu object outside onCreateOptionsMenu method (which means to create/show the menu when the user doesn't press the button), so I need to create a menu instance to pass it to the inflate method.

以下是我要实现的目标的示例:

Here is an example of what I am trying to achieve:

Menu menu = // How to create an instance !? 
new MenuInflater(context).inflate(R.menu.my_menu, menu)

Menu 是一个接口，所以我需要知道哪个类正在实现它.我确实浏览了 Android 代码以获取有关如何创建 Menu 对象的任何提示，但仍然找不到我要查找的内容.

Menu is an interface, so I need to know which class is implementing it. I did browse Android code to get any hint on how a Menu object is created, but still could not find what I am looking for.

编辑 1

我的目标是从自定义视图中触发 onOptionsItemSelected(MenuItem item) 事件，该事件将由活动处理，因此我需要有一个带有特定 itemId 和标题的 MenuItem 对象才能传递它与事件.

My goal is to fire an onOptionsItemSelected(MenuItem item) event from a custom view, which will be handled by the activity, so I need to have a MenuItem object with specific itemId and title to pass it with the event.

如果我能成功创建一个 Menu 对象，就很容易得到它的子 MenuItems.

If I can successfully create a Menu object, it will be easy to get its children MenuItems.

编辑 2

我不试图显示菜单，我想要的是用在菜单 XML 中定义的元素填充 ListView具有标题、图标和 itemId 并且每当单击 ListViewItem 时，我想触发在我的活动中处理的 onOptionsItemSelected(MenuItem item) 事件.

I am not trying to display a menu at all, what I want is to populate a ListView with elements defined in a menu XML that have title, icon and itemId and whenever a ListViewItem is clicked I want to fire a onOptionsItemSelected(MenuItem item) event that is handled in my activity.

我知道我可以解析菜单 XML 以提取项目信息，但是如果不创建 标准 MenuItem 对象，我将无法触发 onOptionsItemSelected(MenuItem item)将其作为参数传递.

I know that I can parse the menu XML to extract items information, however I will not be able to fire onOptionsItemSelected(MenuItem item) without creating a standard MenuItem object to pass it as argument.

任何帮助将不胜感激.谢谢！

Any help will be appreciated. Thanks!

推荐答案

这里有一个获取 Menu 实例的技巧:

Here's a trick to get an instance of Menu:

PopupMenu p  = new PopupMenu(getContext(), null);
Menu menu = p.getMenu();

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