How to put RelativeLayout inside CoordinatorLayout

Question

I'm trying to recreate the search box as it is in Airbnb Android app. So I'm using CoorinatorLayout with Toolbar and RecyclerView.

But when I insert something inside the Coordinator besides those two things, it doesn't show up. Here is my code:

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/slidingLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.design.widget.AppBarLayout
    android:id="@+id/appbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/red"
        app:layout_scrollFlags="scroll|enterAlways" />

</android.support.design.widget.AppBarLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="50dp"
    android:layout_marginRight="50dp"
    android:layout_marginTop="20dp"
    android:background="@drawable/rounded_background"
    android:orientation="horizontal"
    android:padding="6dp"
    app:layout_scrollFlags="scroll|enterAlways">

    <EditText
        android:id="@+id/search"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="6"
        android:background="@null"
        android:fontFamily="sans-serif-light"
        android:hint="Unesite grad"
        android:paddingLeft="16dp"
        android:paddingStart="16dp" />

    <ImageView
        android:id="@+id/cancelSearch"
        android:layout_width="0dp"
        android:layout_height="40dp"
        android:layout_weight="1"
        android:padding="10dp"
        android:src="@drawable/ic_cancel" />
</LinearLayout>

<android.support.v7.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:layout_below="@id/appbar"
    android:background="#ffffff"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

But actually if this even worked, I would have the trouble of putting the search box above the RecyclerView.

I have tried to put everything inside the RelativeLayout but that didn't work.

Here is also the picture of what I'm trying to make

EDIT:

Here is the code with RelativeLayout

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/slidingLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

   <RelativeLayout
       android:layout_width="match_parent"
       android:layout_height="match_parent">

       <android.support.design.widget.AppBarLayout
           android:id="@+id/appbar"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
           android:background="#00000000">

           <android.support.v7.widget.Toolbar
               android:id="@+id/toolbar"
               android:layout_width="match_parent"
               android:layout_height="?attr/actionBarSize"
               android:background="@color/red"
               app:layout_scrollFlags="scroll|enterAlways"/>
   </android.support.design.widget.AppBarLayout>

   <RelativeLayout
       android:layout_width="fill_parent"
       android:layout_height="fill_parent">
       <LinearLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_marginLeft="50dp"
          android:layout_marginRight="50dp"
          android:layout_marginTop="20dp"
          android:background="@drawable/rounded_background"
          android:orientation="horizontal"
          android:padding="6dp"
          app:layout_scrollFlags="scroll|enterAlways">

          <EditText
              android:id="@+id/search"
              android:layout_width="0dp"
              android:layout_height="fill_parent"
              android:layout_weight="6"
              android:background="@null"
              android:fontFamily="sans-serif-light"
              android:hint="Unesite grad"
              android:paddingLeft="16dp"
              android:paddingStart="16dp" />

          <ImageView
              android:id="@+id/cancelSearch"
              android:layout_width="0dp"
              android:layout_height="40dp"
              android:layout_weight="1"
              android:padding="10dp"
              android:src="@drawable/ic_cancel" />
      </LinearLayout>
      <android.support.v7.widget.RecyclerView
           android:id="@+id/recyclerView"
           android:layout_width="match_parent"
           android:layout_height="fill_parent"
           android:layout_below="@id/appbar"
           android:background="#ffffff"
           app:layout_behavior="@string/appbar_scrolling_view_behavior" />
   </RelativeLayout>

Answer 1

I was trying to do something a little similar, but with an ad banner at the bottom of the screen. My solution was to wrap the RelativeLayout outside the CoordinatorLayout as so:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

  <android.support.design.widget.CoordinatorLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_above="@+id/ad_view">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

      <android.support.v7.widget.Toolbar
          android:id="@+id/toolbar"
          android:layout_width="match_parent"
          android:layout_height="?attr/actionBarSize"
          android:background="?attr/colorPrimary"
          app:layout_scrollFlags="scroll|enterAlways"
          app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

    </android.support.design.widget.AppBarLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/my_list_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

  </android.support.design.widget.CoordinatorLayout>

  <com.google.android.gms.ads.AdView
      android:id="@+id/ad_view"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_alignParentBottom="true"
      android:layout_gravity="center|bottom"
      app:adSize="SMART_BANNER"
      app:adUnitId="@string/admob_id" />

</RelativeLayout>

The toolbar properly hides when scrolling inside the RecyclerView and everything seems to be working just fine. I would imagine if you followed a similar principle you should be good-to-go.