4 slot game xml

<Button
        android:id="@+id/action"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Roll"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.306" />

    <ImageView
        android:id="@+id/slot3"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginEnd="4dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/slot4"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.152"
        app:srcCompat="@drawable/slot4" />

    <ImageView
        android:id="@+id/slot4"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginEnd="58dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.152"
        app:srcCompat="@drawable/slot4" />

    <ImageView
        android:id="@+id/slot1"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginStart="58dp"
        android:layout_marginEnd="4dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/slot2"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.152"
        app:srcCompat="@drawable/slot4" />

    <ImageView
        android:id="@+id/slot2"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginEnd="4dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/slot3"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.152"
        app:srcCompat="@drawable/slot4" />