如何在Android的导航抽屉中添加可折叠菜单项? [英] How to add a collapsible menu item inside navigation drawer in android?

问题描述

我有一个DrawerLayout，其中包含一个NavigationView，并且此布局活动用作应用程序中所有活动的通用导航抽屉.我在导航视图中提供app:menu的菜单资源.我有一些菜单项，但是我希望一个菜单项是可折叠/可扩展的，因此当我单击它时，它会展开以显示两个子菜单，并在第二次单击时再次折叠.

I have a DrawerLayout enclosing a NavigationView and this layout activity serves as a common Navigation drawer for all the activities in my app. I am providing the menu resource for app:menu in navigation view. I have some menu items, but I want one menu item to be collapsible/expandable, so that when I click on it, it expands to show two submenus and collapses again on a second click.

我通过在<item>内添加另一个<menu>来添加子菜单，但无法使其可折叠/展开.

I have added submenus by adding another <menu> inside the <item> but cant make it collapsible/expandable.

此外，我不想出于自己的目的使用ExpandableListView.相反，我只需要在菜单资源文件中进行一些调整即可.请给我指出正确的方向.我搜索Google只是为了使用ExpandableListView查找可折叠列表项的代码，博客和示例，但是我需要它与设计支持库中的NavigationView设计小部件一起使用.

Additionally, I don't want to use ExpandableListView for my purpose. Instead, I just need to do some tweaks in menu resource file. Please just point me in the correct direction. I have searched Google only to find code, blogs, and examples for collapsible list items using ExpandableListView, but I need it to work with the NavigationView design widget from the design support Library.

这是我的菜单文件代码:

Here's my code for the menu file:

<menu xmlns:android="http://schemas.android.com/apk/res/android">

<group android:checkableBehavior="single">
    <item
        android:id="@+id/nav_aboutus"
        android:title="About Us" />

    <item
        android:id="@+id/nav_faq"
        android:title="FAQs" />
    <item
        android:id="@+id/nav_share"
        android:title="Share" />
    <item
        android:id="@+id/nav_myaccount"
        android:title="My Account" />
    <item
        android:id="@+id/nav_legal"
        android:title="Legal" >
        <menu>
                <item
                    android:id="@+id/nav_tnc"
                    android:title="Terms and Conditions" />
                <item
                    android:id="@+id/nav_pp"
                    android:title="Privacy Policy" />
            </group>
        </menu>
    </item>

</menu>

我希望法律"菜单项可扩展为具有两个子菜单项条款和条件"，隐私权政策".

I want Legal menu item to be expandable having two submenu items 'Terms and Conditions', 'Privacy Policy'.

推荐答案

您可以在导航抽屉中使用可扩展列表视图，但我不明白为什么您不想使用它们.有关更多信息，请参见 http://developer.android.com/reference/android/widget/ExpandableListView.html

You can use expandable list views inside navigation drawers, I don't understand why you don't want to use them. More on that can be found here http://developer.android.com/reference/android/widget/ExpandableListView.html

如果您坚持不使用expandableListView，那么另一种方法是使用菜单的OnSelect特定项自己设计扩展.尽管我真的不知道为什么要这么做，但是您只是重新实现了.

If you insist on not using expandableListView, then the alternative is to design the expansion yourself using the menu's OnSelect for that specific item. Though I really don't know why you want this, you'd just be re-implementing the wheel.

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