private void createNavDrawerItems() {
    mDrawerItemsListContainer = (ViewGroup) findViewById(R.id.navdrawer_items_list);
    ...
    int i = 0;
    for (int itemId : mNavDrawerItems) {
        mNavDrawerItemViews[i] = makeNavDrawerItem(itemId, mDrawerItemsListContainer);
        mDrawerItemsListContainer.addView(mNavDrawerItemViews[i]);
        ++i;
    }
}

private View makeNavDrawerItem(final int itemId, ViewGroup container) {
    ...
    if (itemId == NAVDRAWER_ITEM_SEPARATOR) {
        layoutToInflate = R.layout.navdrawer_separator;
    } else if (itemId == NAVDRAWER_ITEM_SEPARATOR_SPECIAL) {
        layoutToInflate = R.layout.navdrawer_separator;
    } else {
        layoutToInflate = R.layout.navdrawer_item;
    }
    ...
    return view;
}

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <!-- your content layout -->

    <android.support.design.widget.NavigationView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/drawer_header"
        />
</android.support.v4.widget.DrawerLayout>

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:choiceMode="singleChoice"
    android:orientation="vertical">

    <TextView
        android:id="@+id/myFirstButton"
        android:onClick="onMyFirstButtonClick"
        android:text="@string/my_first_button_title"/>

    <TextView
        android:id="@+id/goToTheTopButton"
        android:onClick="onGoToTheTopButtonClick"
        android:text="@string/go_to_the_top_title"/>

    <View style="@style/Divider"/>

    <!-- Some other "menu items" -->
</LinearLayout>