android - ListViews Behind ActionBar -

i made 1 activity navigationview. when select 1 item of navigationview loads 1 fragment. .xml contains layouts activity , fragment:

<?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.drawerlayout xmlns:android="http://schemas.android.com/apk/res/android" 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">  <relativelayout     android:layout_width="match_parent"     android:layout_height="match_parent">      <linearlayout         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:orientation="vertical">          //layout activity         <relativelayout             android:id="@+id/separator"             android:layout_width="match_parent"             android:layout_height="match_parent"             >              <listview                 android:id="@+id/firstlist"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:choicemode="multiplechoice"                 android:clickable="false" />           </relativelayout>          //layout fragment         <relativelayout             android:layout_width="wrap_content"             android:layout_height="wrap_content">              <listview                 android:id="@+id/secondlist"                 android:layout_width="match_parent"                 android:layout_height="match_parent" />         </relativelayout>     </linearlayout>      <include         layout="@layout/app_bar_main"         android:layout_width="match_parent"         android:layout_height="wrap_content" />  </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"     app:headerlayout="@layout/nav_header_main"     app:menu="@menu/activity_main_drawer" />   </android.support.v4.widget.drawerlayout> 

the problem lists (listviews). behind action bar , don't know why.

i think problem .xml. if necessary provide more code. thanks.

edit app_bar.xml:

<?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.coordinatorlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:fitssystemwindows="true" >  <android.support.design.widget.appbarlayout     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:theme="@style/apptheme.appbaroverlay">      <android.support.v7.widget.toolbar         android:id="@+id/toolbar"         android:layout_width="match_parent"         android:layout_height="?attr/actionbarsize"         android:background="?attr/colorprimary"         app:popuptheme="@style/apptheme.popupoverlay" />  </android.support.design.widget.appbarlayout>    </android.support.design.widget.coordinatorlayout> 

this happening because of wrong xml.

<relativelayout     android:layout_width="match_parent"     android:layout_height="match_parent">     <linearlayout 

add id layout.

        android:id="@+id/list_layout"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:orientation="vertical"> 

add make following change in app_bar_main

<include     layout="@layout/app_bar_main"     android:layout_above="@id/list_layout"     android:layout_width="match_parent"     android:layout_height="wrap_content" />