从XML创建的现有菜单创建子菜单编程

问题描述：

我已经建立在XML中我父母的菜单，现在我不知道如何使用code的家长下创建子菜单。这意味着，父母都在menu.xml文件和子菜单codeD将基于动态code作为当数据是可用的。

I have created my parent menus in xml , now i don't know how to create submenus under those parents using code. That means , parents are coded in menu.xml and submenus will be loaded based on a dynamic code as and when the data is available.

当我试图使用menu.addSubMenu它创建一个新的父菜单项。

When i tried to use menu.addSubMenu it is creating a new parent menu item.

答

mymenu.xml：

mymenu.xml:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
            android:id="@+id/menubutton_submenuButton"
            android:showAsAction="always"/>
        <menu>
            <!-- empty submenu, filled programatically -->
        </menu>
    </item>
</menu>

再后来在code：

Then later in code:

@Override
public boolean onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.mymenu, menu);

    MenuItem menuItem = menu.findItem(R.id.menubutton_submenuButton);
    SubMenu subMenu = menuItem.getSubMenu();
    // @todo: add submenu items programmatically here.

    return super.onCreateOptionsMenu(menu, inflater);
}

从XML创建的现有菜单创建子菜单编程

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