knigopis/app/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".feature.MainActivity">

    <include layout="@layout/default_app_bar" />

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipeRefresh"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

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

            <include
                layout="@layout/books_page"
                android:visibility="gone"
                tools:visibility="visible" />

            <include
                layout="@layout/users_page"
                android:visibility="gone" />

            <include
                layout="@layout/notes_page"
                android:visibility="gone" />

            <ProgressBar
                android:id="@+id/booksProgressBar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:alpha="0"
                tools:alpha="1" />

        </FrameLayout>

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

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/bottomNavigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:background="?attr/bottom_navigation_color"
        android:visibility="gone"
        app:menu="@menu/navigation" />

</LinearLayout>