Layout with nested scroll and collapsible image

activity_book_detail.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"
    android:id="@+id/mainContent"
    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:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsingToolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="@color/lime_700"
            app:expandedTitleTextAppearance="?android:attr/textAppearanceMedium"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <android.support.v4.view.ViewPager
                android:id="@+id/viewPagerSlider"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                app:layout_collapseMode="parallax" />

            <LinearLayout
                android:id="@+id/layoutPagesIndicator"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:layout_marginBottom="8dp"
                android:gravity="center_horizontal"
                android:orientation="horizontal">

            </LinearLayout>

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

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

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

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:paddingBottom="@dimen/activity_vertical_margin"
            android:paddingLeft="@dimen/activity_horizontal_margin"
            android:paddingRight="@dimen/activity_horizontal_margin"
            android:paddingTop="@dimen/activity_vertical_margin">

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemTitle"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_title"
                app:itemLabel="@string/book_detail_title"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemAuthor"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_author"
                app:itemLabel="@string/book_detail_author"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemISBN"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_isbn"
                app:itemLabel="@string/book_detail_isbn"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemStatus"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_status"
                app:itemLabel="@string/book_detail_status"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemEditorial"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_editorial"
                app:itemLabel="@string/book_detail_editorial"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemEdition"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_edition"
                app:itemLabel="@string/book_detail_edition"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemPublish"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_publish"
                app:itemLabel="@string/book_detail_publish"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemLanguage"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_language"
                app:itemLabel="@string/book_detail_language"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemLocation"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_location"
                app:itemLabel="@string/book_detail_location"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemCategory"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_category"
                app:itemLabel="@string/book_detail_category"
                app:itemTint="@color/lime_500" />

            <com.gammapeit.equilibro.views.TextItemLayout
                android:id="@+id/itemDescription"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/activity_vertical_margin"
                app:itemIcon="@drawable/ic_description"
                app:itemLabel="@string/book_detail_description"
                app:itemTint="@color/lime_500" />

        </LinearLayout>
    </android.support.v4.widget.NestedScrollView>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/buyBook"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/fab_margin"
        android:clickable="true"
        android:src="@drawable/ic_shopping_cart"
        app:backgroundTint="@color/orange_500"
        app:layout_anchor="@id/appBar"
        app:layout_anchorGravity="bottom|right|end"
        app:layout_behavior="com.gammapeit.equilibro.views.FABScrollBehavior" />

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