# Step 2: Solution

## `activity_main.xml`

This is how your code should look by now

```
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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">
    
    <android.support.constraint.Guideline
        android:id="@+id/guideline_verticalHalf"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.5"/>

    <android.support.constraint.Guideline
        android:id="@+id/guideline_horizontalHalf"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.5"/>

    <android.support.constraint.Guideline
        android:id="@+id/guideline_horizontal38"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.38" />

    <android.support.constraint.Guideline
        android:id="@+id/guideline_horizontal30"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.30" />

    <android.support.constraint.Guideline
        android:id="@+id/guideline_horizontal20"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.20" />

</android.support.constraint.ConstraintLayout>
```

{% hint style="info" %}
A vertical guideline has a width of zero and the height of their ConstraintLayout parent. A horizontal one has a height of zero and the width of their ConstraintLayout parent.

It doesn't matter if we're going to set the XML values of the width and height to `wrap_content`or `match_parent`&#x20;
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://elizacamber.gitbook.io/animations-2018/solution-step-2.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.