how do you add space between views?

You should better use ConstrainLayout

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:gravity="center">

    <Button
    android:id="@+id/btn1"
    android:layout_width="125px"
    android:layout_height="wrap_content"
    android:layout_marginStart="16dp"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"/>

<TextView
    android:id="@+id/txv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:hint="Los Santos"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"/>

<Button
    android:id="@+id/btn2"
    android:layout_width="125px"
    android:layout_height="wrap_content"
    android:layout_marginEnd="16dp"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

Here is the docs about it https://developer.android.com/reference/androidx/constraintlayout/widget/ConstraintLayout