activity_detail.xml

<?xml version="1.0" encoding="utf-8"?><!--
  ~ Copyright 2018 Sudhir Khanger
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~     http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<layout 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">

    <data />

    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:context=".ui.detail.DetailActivity">

        <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="@dimen/appbar_height"
            android:theme="@style/AppTheme.AppBarOverlay">

            <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/collapsing_toolbar"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_scrollFlags="scroll|exitUntilCollapsed">

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

                    <ImageView
                        android:id="@+id/backdrop_image_view"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:adjustViewBounds="true"
                        android:scaleType="centerCrop"
                        app:layout_collapseMode="parallax"
                        app:layout_collapseParallaxMultiplier="0.5" />

                    <TextView
                        android:id="@+id/title_text_view"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentStart="true"
                        android:layout_alignParentLeft="true"
                        android:layout_alignParentBottom="true"
                        android:layout_marginStart="@dimen/margin_16dp"
                        android:layout_marginLeft="@dimen/margin_16dp"
                        android:layout_marginBottom="@dimen/margin_8dp"
                        android:textColor="@android:color/white"
                        android:textSize="@dimen/title_size"
                        android:textStyle="bold"
                        tools:text="Title" />
                </RelativeLayout>

                <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    app:layout_collapseMode="pin"
                    app:popupTheme="@style/AppTheme.PopupOverlay" />
            </android.support.design.widget.CollapsingToolbarLayout>
        </android.support.design.widget.AppBarLayout>

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

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