Jogo da Velha 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"
    android:background="@drawable/fundo"
    tools:context=".MainActivity" >

    <LinearLayout
        android:id="@+id/LinearLayout1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="170dp"
        android:orientation="horizontal"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <ImageView
            android:id="@+id/ImageView01"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:clickable="true"
            android:onClick="selecionar" />

        <ImageView
            android:id="@+id/ImageView02"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:clickable="true"
            android:onClick="selecionar" />

        <ImageView
            android:id="@+id/ImageView03"
            android:layout_width="80dp"
            android:clickable="true"
            android:onClick="selecionar" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/LinearLayout2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="24dp"
        android:orientation="horizontal"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/LinearLayout1">

        <ImageView
            android:id="@+id/ImageView04"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:clickable="true"
            android:onClick="selecionar" />

        <ImageView
            android:id="@+id/ImageView05"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:clickable="true"
            android:onClick="selecionar" />

        <ImageView
            android:id="@+id/ImageView06"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:clickable="true"
            android:onClick="selecionar" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/LinearLayout3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="24dp"
        android:orientation="horizontal"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/LinearLayout2">

        <ImageView
            android:id="@+id/ImageView07"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:clickable="true"
            android:onClick="selecionar" />

        <ImageView
            android:id="@+id/ImageView08"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:clickable="true"
            android:onClick="selecionar" />

        <ImageView
            android:id="@+id/ImageView09"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:clickable="true"
            android:onClick="selecionar" />
    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>