<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">


    <RelativeLayout
    android:layout_height="match_parent"
    android:layout_width="match_parent"
        android:id="@+id/fragment_container"
    xmlns:android="http://schemas.android.com/apk/res/android" >

        <ExpandableListView
        android:id="@+id/lvExp"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:dividerHeight="1dp"
        android:layout_gravity="start"
        android:divider="#9E9E9E"
        android:childDivider="@color/colorPrimaryDark"
        android:drawSelectorOnTop="true"/>

    </RelativeLayout>


    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />


</android.support.v4.widget.DrawerLayout>