details.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:background="@color/colorPrimaryDark"
    android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar_layout"
        android:layout_width="match_parent"
        android:layout_height="400dp"
        android:elevation="0dp"
        android:fitsSystemWindows="true"
        android:theme="@style/AppTheme.AppBarOverlay"
        android:stateListAnimator="@null" >

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:titleEnabled="false">

            <ImageView
                android:id="@+id/background"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:clickable="false"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                android:src="@drawable/bg_1"
                app:layout_collapseMode="parallax" />

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:elevation="0dp"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/AppTheme.PopupOverlay" />

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

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

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

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/likeButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/fab_margin"
        app:layout_anchor="@id/app_bar_layout"
        app:layout_anchorGravity="bottom|end"
        app:srcCompat="@drawable/ic_heart_outline" />

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

details_content.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.constraint.ConstraintLayout
            android:id="@+id/details"
            android:layout_width="match_parent"
            android:layout_height="70dp"
            android:background="#1A000000"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent">

            <ImageView
                android:id="@+id/logo"
                android:layout_width="35dp"
                android:layout_height="35dp"
                android:layout_marginBottom="8dp"
                android:layout_marginStart="16dp"
                android:layout_marginTop="8dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:srcCompat="@drawable/ic_distropaper" />

            <TextView
                android:id="@+id/backgroundTitle"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="16dp"
                android:text="@string/title"
                android:textColor="@android:color/white"
                android:textSize="18sp"
                android:textStyle="bold"
                app:layout_constraintBottom_toTopOf="@+id/username"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toEndOf="@+id/logo"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_chainStyle="packed" />

            <TextView
                android:id="@+id/username"
                android:layout_width="0dp"
                android:layout_height="16dp"
                android:layout_marginEnd="8dp"
                android:alpha="0.5"
                android:text="@string/username"
                android:textColor="@android:color/white"
                android:textSize="13sp"
                android:textStyle="italic"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toStartOf="@+id/backgroundTitle"
                app:layout_constraintTop_toBottomOf="@+id/backgroundTitle" />

            <android.support.constraint.Guideline
                android:id="@+id/guideline"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                app:layout_constraintGuide_begin="35dp" />

        </android.support.constraint.ConstraintLayout>

        <android.support.constraint.ConstraintLayout
            android:id="@+id/constraintLayout"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:clickable="true"
            android:focusable="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/details">

            <TextView
                android:id="@+id/description"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginEnd="16dp"
                android:layout_marginStart="16dp"
                android:layout_marginTop="16dp"
                android:text="@string/description_placeholder"
                android:textColor="@android:color/white"
                android:textSize="13sp"
                android:visibility="visible"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/saveWallpaper" />

            <LinearLayout
                android:id="@+id/saveWallpaper"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:background="@null"
                android:clickable="true"
                android:focusable="true"
                android:foreground="?selectableItemBackground"
                android:gravity="center"
                android:orientation="vertical"
                android:paddingBottom="16dp"
                android:paddingTop="16dp"
                app:layout_constraintEnd_toStartOf="@+id/setWallpaper"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent">

                <ImageView
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:src="@drawable/ic_download"
                    android:tint="@android:color/white" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="5dp"
                    android:text="@string/save"
                    android:textAllCaps="true"
                    android:textColor="@android:color/white"
                    android:textSize="13sp" />

            </LinearLayout>

            <LinearLayout
                android:id="@+id/setWallpaper"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:background="@null"
                android:clickable="true"
                android:focusable="true"
                android:foreground="?selectableItemBackground"
                android:gravity="center"
                android:orientation="vertical"
                android:paddingBottom="16dp"
                android:paddingTop="16dp"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toEndOf="@+id/saveWallpaper"
                app:layout_constraintTop_toTopOf="parent">

                <ImageView
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:src="@drawable/ic_set"
                    android:tint="@android:color/white" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="5dp"
                    android:text="@string/set"
                    android:textAllCaps="true"
                    android:textColor="@android:color/white"
                    android:textSize="13sp" />

            </LinearLayout>

            <TextView
                android:id="@+id/textView6"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginEnd="16dp"
                android:layout_marginStart="16dp"
                android:alpha=".5"
                android:text="@string/distropaper_exclusive"
                android:textColor="@android:color/white"
                android:textSize="11sp"
                android:textStyle="italic"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/description" />

        </android.support.constraint.ConstraintLayout>

    </android.support.constraint.ConstraintLayout>

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