bottom toolbar problem

bottom.xml

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.amirsiddique.recyclerview.MainActivity">

    <include
        android:id="@+id/toolbar"
        layout="@layout/toolbar" />

    <LinearLayout
        android:layout_below="@+id/toolbar"
        android:id="@+id/spinner_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Spinner
            android:id="@+id/sectorsSpinner"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textSize="12sp" />

        <Spinner
            android:id="@+id/indicesSpinner"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textSize="12sp" />

        <Spinner
            android:id="@+id/sortSpinner"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textSize="12sp" />
    </LinearLayout>

    <LinearLayout
        android:layout_below="@+id/spinner_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        >

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recyclerView_main"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:background="@color/white">

        </android.support.v7.widget.RecyclerView>

        <ProgressBar
            android:id="@+id/progressBar"
            style="?android:attr/progressBarStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
           android:layout_gravity="center"
            />

    </LinearLayout>

    <RelativeLayout
        android:id="@+id/bottomnavigation"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true" >

        <android.support.design.widget.BottomNavigationView
            android:id="@+id/bottomNavigation"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            app:menu="@menu/bottom_navigation_menu">

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


    </RelativeLayout>


</RelativeLayout>