linphone-android/app/src/main/res/layout/voip_conference_grid.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <data>
        <import type="android.view.View" />
        <variable
            name="conferenceViewModel"
            type="org.linphone.activities.voip.viewmodels.ConferenceViewModel" />
        <variable
            name="controlsViewModel"
            type="org.linphone.activities.voip.viewmodels.ControlsViewModel" />
        <variable
            name="inflatedVisibility"
            type="Integer" />
    </data>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="@{inflatedVisibility}">

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

            <LinearLayout
                android:visibility="@{controlsViewModel.fullScreenMode || controlsViewModel.pipMode ? View.GONE : View.VISIBLE}"
                android:layout_width="match_parent"
                android:layout_height="@dimen/voip_call_header_height"
                android:layout_marginBottom="10dp"
                android:gravity="center_vertical"
                android:orientation="horizontal">

                <LinearLayout
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        style="@style/call_header_title"
                        android:maxLines="1"
                        android:ellipsize="end"
                        android:text="@{conferenceViewModel.subject, default=@string/conference_default_title}"/>

                    <Chronometer
                        android:id="@+id/grid_conference_timer"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        style="@style/call_header_subtitle" />

                </LinearLayout>

                <ImageView
                    android:onClick="@{() -> conferenceViewModel.toggleRecording()}"
                    android:selected="@{conferenceViewModel.isRecording}"
                    android:layout_height="40dp"
                    android:layout_width="40dp"
                    android:background="@drawable/button_call_recording_background"
                    android:src="@drawable/icon_call_record"
                    android:contentDescription="@string/content_description_toggle_recording"
                    android:padding="7dp"
                    android:layout_marginEnd="10dp"/>

                <ImageView
                    android:onClick="@{() -> conferenceViewModel.pauseConference()}"
                    android:selected="@{conferenceViewModel.isConferenceLocallyPaused}"
                    android:enabled="@{!conferenceViewModel.conferenceCreationPending}"
                    android:layout_height="40dp"
                    android:layout_width="40dp"
                    android:background="@drawable/button_toggle_background"
                    android:src="@drawable/icon_pause"
                    android:contentDescription="@string/content_description_pause_call"
                    android:padding="5dp"/>

            </LinearLayout>

            <LinearLayout
                android:visibility="@{conferenceViewModel.isRemotelyRecorded ? View.VISIBLE : View.GONE, default=gone}"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:gravity="center"
                android:layout_marginBottom="10dp"
                android:background="@drawable/shape_remote_recording_background">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@drawable/voip_remote_recording"
                    android:contentDescription="@null"/>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    style="@style/call_remote_recording_font"
                    android:layout_marginStart="10dp"
                    android:text="@string/call_remote_recording"/>

            </LinearLayout>

            <com.google.android.flexbox.FlexboxLayout
                android:onClick="@{() -> controlsViewModel.toggleFullScreen()}"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:entries="@{conferenceViewModel.conferenceParticipantDevices}"
                app:layout="@{@layout/voip_conference_participant_remote_grid}"
                app:flexDirection="column"
                app:flexWrap="wrap"
                app:alignItems="stretch"
                app:alignContent="stretch"
                app:justifyContent="space_between"
                app:showDivider="middle"
                app:dividerDrawable="@{controlsViewModel.fullScreenMode ? @drawable/shape_conference_divider_fullscreen : @drawable/shape_conference_divider}"/>

        </LinearLayout>

    </RelativeLayout>

</layout>