Android Navigation view: Scroll the menu items only issue

Question

I want to scroll only the menu items of the navigation view but it also scroll the header with it. Please any body tell me how to achieve this... Here is my code:

activity_main.xml

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
        .......    
        <android.support.design.widget.NavigationView
            android:id="@+id/navigation_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            app:headerLayout="@layout/header"
            app:menu="@menu/drawer" />
    </android.support.v4.widget.DrawerLayout>

header.xml

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="190dp"
        android:background="@drawable/background_material"
        android:orientation="vertical"
        >

        <de.hdodenhof.circleimageview.CircleImageView xmlns:app="http://schemas.android.com/apk/res-auto"
            android:id="@+id/profile_image"
            android:layout_width="76dp"
            android:layout_height="76dp"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_centerVertical="true"
            android:layout_marginLeft="24dp"
            android:layout_marginStart="24dp"
            android:src="@mipmap/ic_launcher"
            app:border_color="#FF000000" /
    </RelativeLayout>

drawer_menu_items.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <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" />
        <item
            android:id="@+id/trash"
            android:checked="false"
            android:icon="@drawable/ic_delete_black"
            android:title="@string/trash_string" />
        <item
            android:id="@+id/spam"
            android:checked="false"
            android:icon="@drawable/ic_error_black"
            android:title="@string/spam_string" />
        <item
            android:id="@+id/abc"
            android:checked="false"
            android:icon="@android:drawable/ic_menu_camera"
            android:title="Camera" />
        <item
            android:id="@+id/abcd"
            android:checked="false"
            android:icon="@android:drawable/ic_menu_call"
            android:title="Call" />
        <item
            android:id="@+id/abcde"
            android:checked="false"
            android:icon="@android:drawable/ic_menu_gallery"
            android:title="Gallery" />

        <item

            android:checked="false"
            android:icon="@android:drawable/ic_menu_gallery"
            android:title="Gallery" />
        <item

            android:checked="false"
            android:icon="@android:drawable/ic_menu_compass"
            android:title="Compass" />
        <item

            android:checked="false"
            android:icon="@android:drawable/ic_menu_myplaces"
            android:title="My Places" />

    </group>
</menu>

How can I only scroll the menu item not the header... I've attached some pictures too...

Answer 1

I know its Too old Question but its too easy!

<android.support.design.widget.NavigationView
    android:id="@+id/navigationview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    app:headerLayout="@layout/header_drawer"
    app:menu="@menu/item_drawer">

</android.support.design.widget.NavigationView>

Add the following code to the NavigationView (<include layout="@layout/header_drawer"/>)

<android.support.design.widget.NavigationView
     android:id="@+id/navigationview"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:layout_gravity="start"
     app:headerLayout="@layout/header_drawer"
     app:menu="@menu/item_drawer">

    <include layout="@layout/header_drawer"/>

 </android.support.design.widget.NavigationView>