title: Recyclerview covered by BottomNavigationView in CoordinatorLayout
body: <p>I tried Google Support Library BottomNavigationView with a Framelayout for my Fragments . </p>
  
  <p>Here are my code </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  
  &lt;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"
  tools:context="com.bottombarnavigation.MainActivity"&gt;
  
  &lt;android.support.design.widget.AppBarLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:theme="@style/AppTheme.AppBarOverlay"&gt;
  
    &lt;include layout="@layout/toolbar"/&gt;
  
  &lt;/android.support.design.widget.AppBarLayout&gt;
  
  &lt;include layout="@layout/content_main" /&gt;
  
  &lt;android.support.design.widget.BottomNavigationView
      android:background="#fcfcfc"
      android:id="@+id/bottom_navigation"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_gravity="bottom|end"
      app:menu="@menu/bottom_navigation" /&gt;
  
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>When i populate my Recyclerview inside the Fragment, it's content got covered up by the BottomNavigationView . </p>
  
  <p><a href="https://i.stack.imgur.com/dvZql.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/dvZql.jpg" alt="enter image description here"></a></p>
  
  <p>I have no idea why this happens. I look through other people tutorial and it works fine.</p>
  
  <p><strong>EDIT</strong>
  Here is my content_main.xml file</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
      &lt;RelativeLayout 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:background="@android:color/white"
      app:layout_behavior="@string/appbar_scrolling_view_behavior"
      tools:context="com.bottombarnavigation.MainActivity"
      tools:showIn="@layout/activity_main"&gt;
  
  
  &lt;FrameLayout
      android:id="@+id/container"
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;&lt;/FrameLayout&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>