如何启用运行/禁用上下文菜单项 [英] How to enable/disable context menu items on runtime

问题描述

我想启用/禁用项目根据一定的条件下...

通过选项菜单中，你可以做：

  .setGroupEnabled（0，假）;
 

但我不知道怎么跟上下文菜单做到这一点。

我怎么能这样做？

感谢

编辑：这些项目是在膨胀的菜单

  @覆盖
    公共无效onCreateContextMenu（文本菜单菜单视图V，ContextMenuInfo menuInfo）{        super.onCreateContextMenu（菜单，V，menuInfo）;        MenuInflater吹气= getMenuInflater（）;        inflater.inflate（R.menu.options，菜单）;
    }
 

解决方案

您可以修改/从 onCreateContextMenu 方法中在运行时创建一个上下文菜单。

  @覆盖
公共无效onCreateContextMenu（文本菜单菜单视图V，ContextMenuInfo menuInfo）{
    super.onCreateContextMenu（菜单，V，menuInfo）;    AdapterContextMenuInfo信息=（AdapterContextMenuInfo）menuInfo;
    为MyObject OBJ =（为MyObject）myListView.getItemAtPosition（info.position）;    menu.setHeaderTitle（选择选项）;
    menu.add（0，v.getId（），0，删除+ obj.name）;
}
 

下面是一些示例code，我从<一花href=\"http://stackoverflow.com/questions/3631967/how-to-create-a-dynamic-context-menu-in-android\">this帖子。通过重写此方法，你可以修改菜单的创建。只是这里内添加一些条件语句来控制你的不同scenerios。

I want to enable/disable items depending certain conditions...

With options menu you can do:

.setGroupEnabled(0, false);

But i don't know how to do this with context menu

How can I do that?

Thanks

EDIT: These items are in inflated menu

@Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {

        super.onCreateContextMenu(menu, v, menuInfo);

        MenuInflater inflater = getMenuInflater();

        inflater.inflate(R.menu.options, menu);
    }

解决方案

You can modify/create a context menu at runtime from within the onCreateContextMenu method.

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);

    AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
    MyObject obj = (MyObject) myListView.getItemAtPosition(info.position);

    menu.setHeaderTitle("Selection Options");  
    menu.add(0, v.getId(), 0, "Remove " + obj.name); 
}

Here is some sample code I took from this post. By overriding this method you can modify the menu as its created. Just add some conditionals within here to control your different scenerios.

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