linphone-android/app/src/main/res/layout/voip_conference_header.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" />
    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <androidx.constraintlayout.widget.Group
            android:id="@+id/group"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:constraint_referenced_ids="remote_name,active_conference_timer,toggle_conference_recording,toggle_pause_conference" />

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

        <Chronometer
            android:id="@+id/active_conference_timer"
            style="@style/call_header_subtitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/remote_name" />

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

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

    </androidx.constraintlayout.widget.ConstraintLayout>

</layout>