res/layout/fragment_preview.xml

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout 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="match_parent"
             android:fitsSystemWindows="false">

  <ImageView
    android:id="@+id/low_res_image"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scaleType="centerCrop"
    android:background="@android:color/black"/>

  <com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
      android:id="@+id/full_res_image"
      android:layout_width="match_parent"
      android:layout_height="match_parent" />

  <ImageView
    android:id="@+id/loading_indicator"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:visibility="invisible"
    android:fitsSystemWindows="false"/>

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

      <androidx.coordinatorlayout.widget.CoordinatorLayout
          android:id="@+id/coordinator_layout"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_gravity="bottom">

        <include
            layout="@layout/preview_page_info"
            android:id="@+id/bottom_sheet"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:behavior_peekHeight="@dimen/preview_attribution_pane_collapsed_height"
            app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior"/>

    </androidx.coordinatorlayout.widget.CoordinatorLayout>

    <androidx.appcompat.widget.Toolbar
      android:id="@+id/toolbar"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_gravity="top"
      style="@style/TranslucentToolbarStyle"/>

  </FrameLayout>

</FrameLayout>