How to put Facebook Logout button in the end of navigation view

Question

I have implemented facebook login through facebook sdk 4.3 I have made separate dialog fragment for login of facebook. Till now Every thing is working very well.

What I want I want to implement facebook log out button in the bottom of my navigation view to get logout but I do not have idea how to implement it. Because I have implemented facebook login through facebook login button . and I have seen after login that button change into a facebook logout button. Now I want two thing

1. How to insert a button in navigation view As I have made navigation view through new design technique and what ever I have added in that is through navigation menu. So I do not have idea how to add button in it

2. Secondly I do not know how to get log out from facebook using native or custom button. which function I have to implement

What i have searched so far , they are getting logout thorough session which now do not exist in facebook new sdk. So I have no idea How to implement it separately

For you let me put some code so that you come to know How I have implemented my Navigation view

this coede is in my main xml for navigation view

<android.support.design.widget.NavigationView
    android:id="@+id/navigation_view"
    android:layout_height="match_parent"
    android:layout_width="wrap_content"
    android:layout_gravity="fill_vertical|left"
    app:menu="@menu/drawer"
    app:itemTextColor="#ffffff"
    android:background="#AF4B02"
    app:itemIconTint="@color/navigation_icon"
    android:fadingEdge="horizontal"/>

and this is my drawer item in menu folder

<group android:checkableBehavior="single">

    <item
        android:id="@+id/home"
        android:checked="false"
        android:icon="@drawable/drawer_ic_home"
        android:title="@string/home_string" />

    <item
        android:id="@+id/offer"
        android:checked="false"
        android:icon="@drawable/drawer_ic_offer"
        android:title="@string/offer_string" />


    <item
        android:id="@+id/share"
        android:checked="false"
        android:icon="@drawable/drawer_ic_share"
        android:title="@string/share" />
    <item
        android:id="@+id/take"
        android:checked="false"
        android:icon="@drawable/drawer_ic_take"
        android:title="@string/take" />


    <item
        android:id="@+id/offer_status"
        android:checked="false"
        android:icon="@drawable/drawer_ic_status"
        android:title="@string/offer_status"
        />


    <item
        android:id="@+id/about_us"
        android:checked="false"
        android:icon="@drawable/drawer_ic_about_us"
        android:title="@string/about_us_string" />


</group>

so now in navigation view I want to add button at the bottom of the Navigation view So tell me How to do this ? how to listen its click event and then on that click How to logout from facebook?

Please help .

Answer 1

Here is how I add button to the bottom of navigation view

<android.support.design.widget.NavigationView
    android:id="@+id/navigation_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:background="@color/white"
    app:headerLayout="@layout/navigation_view_header"
    app:itemIconTint="@drawable/navigation_selector_text"
    app:itemTextColor="@drawable/navigation_selector_text"
    app:menu="@menu/side_navigation_menu_login">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <FacebookButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true">
        </FacebookButton>
    </RelativeLayout>
</android.support.design.widget.NavigationView>