constraintlayout_flow.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="match_parent"
    tools:context=".MainActivity">

    <androidx.constraintlayout.helper.widget.Flow
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:flow_wrapMode="chain"
        app:constraint_referenced_ids="btn1, btn2, btn3, btn4, btn5"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn1"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:text="Button 1"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn2"
        app:layout_constraintLeft_toRightOf="@+id/btn1"
        app:layout_constraintTop_toTopOf="parent"
        android:text="Button 2"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn3"
        app:layout_constraintLeft_toRightOf="@+id/btn2"
        app:layout_constraintTop_toTopOf="parent"
        android:text="Button 3"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn4"
        app:layout_constraintLeft_toRightOf="@+id/btn3"
        app:layout_constraintTop_toTopOf="parent"
        android:text="Button 4"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn5"
        app:layout_constraintLeft_toRightOf="@+id/btn4"
        app:layout_constraintTop_toTopOf="parent"
        android:text="Button 5"/>



</androidx.constraintlayout.widget.ConstraintLayout>