loongoffice/android/source/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout android:id="@+id/drawer_layout"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#fff"
    tools:context=".LibreOfficeMainActivity">

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

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <com.google.android.material.appbar.AppBarLayout
                android:id="@+id/appBar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <com.google.android.material.appbar.MaterialToolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    android:elevation="3dp"
                    app:theme="@style/LibreOfficeTheme"
                    tools:theme="@style/LibreOfficeTheme"
                    app:popupTheme="@style/LibreOfficeTheme" />

            </com.google.android.material.appbar.AppBarLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/background_floating">

                <EditText
                    android:id="@+id/calc_address"
                    android:layout_width="@dimen/calc_address_bar_width"
                    android:layout_height="wrap_content"
                    android:layout_weight="0"
                    android:inputType="textNoSuggestions"
                    android:imeOptions="actionDone|actionGo"
                    android:visibility="gone"
                    android:importantForAutofill="no" />

                <EditText
                    android:id="@+id/calc_formula"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:inputType="text"
                    android:imeOptions="actionDone|actionGo"
                    android:visibility="gone"
                    android:importantForAutofill="no" />

            </LinearLayout>

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

                <View
                    android:id="@+id/calc_header_top_left"
                    android:layout_width="@dimen/calc_header_width"
                    android:layout_height="@dimen/calc_header_height"
                    android:visibility="gone"/>

                <org.libreoffice.overlay.CalcHeadersView
                    android:id="@+id/calc_header_column"
                    android:layout_width="match_parent"
                    android:layout_height="@dimen/calc_header_height"
                    android:layout_toRightOf="@+id/calc_header_top_left"
                    android:visibility="gone"/>

                <org.libreoffice.overlay.CalcHeadersView
                    android:id="@+id/calc_header_row"
                    android:layout_width="@dimen/calc_header_width"
                    android:layout_height="match_parent"
                    android:layout_below="@+id/calc_header_top_left"
                    android:visibility="gone"/>

                <RelativeLayout
                    android:id="@+id/gecko_layout"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="vertical"
                    android:layout_toRightOf="@+id/calc_header_row"
                    android:layout_below="@+id/calc_header_column">

                    <org.mozilla.gecko.gfx.LayerView
                        android:id="@+id/layer_view"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"/>

                    <org.libreoffice.overlay.DocumentOverlayView
                        android:id="@+id/text_cursor_view"
                        android:layout_width="fill_parent"
                        android:layout_height="fill_parent"/>

                </RelativeLayout>

            </RelativeLayout>

        </LinearLayout>

        <include layout="@layout/toolbar_bottom"/>
        <include android:id="@+id/toolbar_back_color_picker" layout="@layout/toolbar_color_picker"/>
        <include android:id="@+id/toolbar_color_picker" layout="@layout/toolbar_color_picker"/>

        <RelativeLayout
            android:id="@+id/loadingPanel"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#9333"
            android:gravity="center">

            <ProgressBar
                android:id="@+id/progressBar"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:indeterminate="true"/>

        </RelativeLayout>

        <!--What's the use of this view? Can it be removed?-->
        <View
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

    </androidx.coordinatorlayout.widget.CoordinatorLayout>

    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="#9FFF"
        android:choiceMode="singleChoice"/>

</androidx.drawerlayout.widget.DrawerLayout>