nextcloud-android/src/main/res/layout/richdocuments_webview.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  Nextcloud Android client application

  @author Tobias Kaminsky
  Copyright (C) 2018 Tobias Kaminsky
  Copyright (C) 2018 Nextcloud GmbH.

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program. If not, see <https://www.gnu.org/licenses/>.
-->
<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
                                        xmlns:app="http://schemas.android.com/apk/res-auto"
                                        android:id="@+id/drawer_layout"
                                        android:layout_width="match_parent"
                                        android:layout_height="match_parent"
                                        android:clickable="true"
                                        android:fitsSystemWindows="true"
                                        android:focusable="true">

    <!-- The main content view -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical">

        <ImageView
            android:id="@+id/thumbnail"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:contentDescription="@string/file_icon"
            app:srcCompat="@drawable/file"/>

        <TextView
            android:id="@+id/filename"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:ellipsize="middle"
            android:text="@string/placeholder_filename"
            android:textColor="@color/black"
            android:textSize="20sp"
            android:textStyle="bold"/>

        <ProgressBar
            android:id="@+id/progressBar2"
            style="?android:attr/progressBarStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/standard_margin"
            android:indeterminate="true"/>

        <WebView
            android:id="@+id/webView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="gone"/>


    </LinearLayout>

    <include
        layout="@layout/drawer"
        android:layout_width="@dimen/drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:visibility="gone"/>

</androidx.drawerlayout.widget.DrawerLayout>