palestrante_item.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:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/room_item_txt_nome"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="16dp"
        android:layout_marginRight="16dp"
        android:text="TextView"
        android:textSize="24sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/room_item_txt_tecnologia"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="TextView"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="@+id/room_item_txt_nome"
        app:layout_constraintStart_toStartOf="@+id/room_item_txt_nome"
        app:layout_constraintTop_toBottomOf="@+id/room_item_txt_nome" />

    <TextView
        android:id="@+id/room_item_txt_topico"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="TextView"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="@+id/room_item_txt_tecnologia"
        app:layout_constraintStart_toStartOf="@+id/room_item_txt_tecnologia"
        app:layout_constraintTop_toBottomOf="@+id/room_item_txt_tecnologia" />
</androidx.constraintlayout.widget.ConstraintLayout>