I am a beginner in android. I have a question why the spinner is not showing in design window?. For your help I have added a code below

```
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Text View!"
    android:paddingRight="100dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    android:id="@+id/brand"

    />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="New Button"
    android:layout_below="@+id/color"
    android:layout_alignLeft="@+id/color"
    android:id="@+id/find_beer"

    />

<Spinner
    android:id="@+id/color"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="72dp"
    >
</Spinner>

```

[enter image description here](https://i.stack.imgur.com/ALo50.jpg)