项目是从菜单项添加的

drawer_menu_items.xml

<group android:checkableBehavior="single">

    <item
        android:id="@+id/inBox"
        android:checked="false"
        android:icon="@drawable/ic_inBox_black"
        android:title="@string/inBox_string" />

    <item
        android:id="@+id/starred"
        android:checked="false"
        android:icon="@drawable/ic_star_black"
        android:title="@string/starred_string" />

    <item
        android:id="@+id/sent_mail"
        android:checked="false"
        android:icon="@drawable/ic_send_black"
        android:title="@string/sent_mail_string" />

    <item
        android:id="@+id/drafts"
        android:checked="false"
        android:icon="@drawable/ic_drafts_black"
        android:title="@string/draft_string" />


    <item
        android:id="@+id/allmail"
        android:checked="false"
        android:icon="@drawable/ic_email_black"
        android:title="@string/all_mail_string" />

如何添加项目或如何添加切换按钮,如图所示：