element-android/vector/src/main/res/layout/item_room.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/itemRoomLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?riotx_background"
    android:clickable="true"
    android:focusable="true"
    android:foreground="?attr/selectableItemBackground">

    <View
        android:id="@+id/roomUnreadIndicator"
        android:layout_width="4dp"
        android:layout_height="0dp"
        android:background="?attr/colorAccent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:visibility="gone"
        tools:visibility="visible"/>

    <ImageView
        android:id="@+id/roomAvatarImageView"
        android:layout_width="56dp"
        android:layout_height="56dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="12dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:src="@tools:sample/avatars" />

    <!-- Margin bottom does not work, so I use space -->
    <Space
        android:id="@+id/roomAvatarBottomSpace"
        android:layout_width="0dp"
        android:layout_height="12dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/roomAvatarImageView"
        tools:layout_marginStart="20dp" />

    <TextView
        android:id="@+id/roomNameView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/layout_horizontal_margin"
        android:layout_marginLeft="@dimen/layout_horizontal_margin"
        android:layout_marginTop="12dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:duplicateParentState="true"
        android:ellipsize="end"
        android:maxLines="1"
        android:textColor="?riotx_text_primary"
        android:textSize="15sp"
        android:textStyle="bold"
        app:layout_constrainedWidth="true"
        app:layout_constraintEnd_toStartOf="@+id/roomUnreadCounterBadgeView"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintHorizontal_chainStyle="packed"
        app:layout_constraintStart_toEndOf="@id/roomAvatarImageView"
        app:layout_constraintTop_toTopOf="parent"
        tools:text="@sample/matrix.json/data/displayName" />

    <im.vector.riotx.features.home.room.list.UnreadCounterBadgeView
        android:id="@+id/roomUnreadCounterBadgeView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:gravity="center"
        android:minWidth="16dp"
        android:minHeight="16dp"
        android:paddingLeft="4dp"
        android:paddingRight="4dp"
        android:textColor="@android:color/white"
        android:textSize="10sp"
        app:layout_constraintBottom_toBottomOf="@+id/roomNameView"
        app:layout_constraintEnd_toStartOf="@+id/roomLastEventTimeView"
        app:layout_constraintStart_toEndOf="@+id/roomNameView"
        app:layout_constraintTop_toTopOf="@+id/roomNameView"
        tools:background="@drawable/bg_unread_highlight"
        tools:text="4" />

    <TextView
        android:id="@+id/roomLastEventTimeView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:textColor="?riotx_text_secondary"
        android:textSize="15sp"
        app:layout_constraintBottom_toBottomOf="@+id/roomNameView"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@+id/roomNameView"
        tools:text="@tools:sample/date/hhmm" />

    <TextView
        android:id="@+id/roomLastEventView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="3dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:ellipsize="end"
        android:maxLines="2"
        android:textColor="?riotx_text_secondary"
        android:textSize="15sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="@+id/roomNameView"
        app:layout_constraintTop_toBottomOf="@+id/roomNameView"
        tools:text="@sample/matrix.json/data/message" />

    <!-- Margin bottom does not work, so I use space -->
    <Space
        android:id="@+id/roomLastEventBottomSpace"
        android:layout_width="0dp"
        android:layout_height="7dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/roomLastEventView"
        tools:layout_marginStart="120dp" />

    <androidx.constraintlayout.widget.Barrier
        android:id="@+id/roomBottomBarrier"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:barrierDirection="bottom"
        app:constraint_referenced_ids="roomAvatarBottomSpace,roomLastEventBottomSpace" />

    <View
        android:id="@+id/roomDividerView"
        android:layout_width="0dp"
        android:layout_height="1dp"
        android:background="?riotx_header_panel_border_mobile"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/roomBottomBarrier" />

</androidx.constraintlayout.widget.ConstraintLayout>