If you want a fixed (non-scrolling) footer in your navigation menu, you need wrap NavigationView around another layout, like you've posted. NavigationView works like FrameLayout, so this ends up "stacking" the inner layout on top of the NavigationView menu items. Here's one way to arrange it, using LinearLayout for the footer items:
Fixed Footer
<android.support.design.widget.NavigationView
android:id="@+id/drawer"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="@layout/drawer_header"
app:menu="@menu/drawer">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:clickable="true"
android:orientation="vertical">
<TextView
android:id="@+id/footer_item_1"
android:layout_width="match_parent"
android:layout_height="48dp"
android:gravity="center"
android:text="Footer Item 1" />
<TextView
android:id="@+id/footer_item_2"
android:layout_width="match_parent"
android:layout_height="48dp"
android:gravity="center"
android:text="Footer Item 2" />
</LinearLayout>
</android.support.design.widget.NavigationView>
I used TextViews in this example, but you can use whatever you want for the footer views. To avoid the footer items overlapping with the bottom of the menu, add some dummy items to the end of your menu resource file (these will act like "spacers"):
res/menu/drawer.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group>
<item
android:id="@+id/nav_item_1"
android:icon="@drawable/ic_nav_item_1"
android:title="Nav Item 1" />
<item
android:id="@+id/nav_item_2"
android:icon="@drawable/ic_nav_item_2"
android:title="Nav Item 2" />
<item
android:id="@+id/nav_item_3"
android:icon="@drawable/ic_nav_item_3"
android:title="Nav Item 3" />
<item
android:id="@+id/nav_item_4"
android:icon="@drawable/ic_nav_item_4"
android:title="Nav Item 4" />
<item
android:id="@+id/footer_spacer_1"
android:checkable="false"
android:enabled="false"
android:orderInCategory="200"
android:title="" />
<item
android:id="@+id/footer_spacer_2"
android:checkable="false"
android:enabled="false"
android:orderInCategory="200"
android:title="" />
</group>
</menu>
Lastly, don't forget to add click listeners in your Activity for the actual footer views:
...
// Click listener for nav footer.
View navFooter1 = findViewById(R.id.footer_item_1);
navFooter1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Do footer action
}
});
View navFooter2 = findViewById(R.id.footer_item_2);
navFooter2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Do footer action
}
});
...
Scrolling Footer
If you allow the footer to scroll with the rest of the NavigationView though, it makes things simpler (no additional layouts or click listeners). Simply add the footer items to your menu resource file as a unique <group> (this will create a separator line), and everything will be handled automatically and scroll together:
res/menu/drawer.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:id="@+id/nav_menu">
<item
android:id="@+id/nav_item_1"
android:icon="@drawable/ic_nav_item_1"
android:title="Nav Item 1" />
<item
android:id="@+id/nav_item_2"
android:icon="@drawable/ic_nav_item_2"
android:title="Nav Item 2" />
<item
android:id="@+id/nav_item_3"
android:icon="@drawable/ic_nav_item_3"
android:title="Nav Item 3" />
<item
android:id="@+id/nav_item_4"
android:icon="@drawable/ic_nav_item_4"
android:title="Nav Item 4" />
</group>
<group android:id="@+id/nav_footer">
<item
android:id="@+id/nav_footer_1"
android:icon="@drawable/ic_footer_item_1"
android:title="Footer Item 1" />
<item
android:id="@+id/nav_footer_2"
android:icon="@drawable/ic_footer_item_2"
android:title="Footer Item 2" />
</group>
</menu>
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