title: How to make Constraint Layout Guideline in center
body: <p>I have <strong>3 Guideline in  Constraint Layout</strong>. One is in left with <code>16dp</code>left margin. Second is in right with <code>16dp</code> right margin. <strong>But I want another Guideline which will be in center</strong>. Suppose If I make this guideline center in nexus 5 from Android Stdio XML design panel  then in nexus S it's not showing in center. <strong>How to solve this?</strong></p>
  
  <pre><code> &lt;android.support.constraint.ConstraintLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:context="com.blabla.ScrollingActivity"&gt;
  
      &lt;android.support.constraint.Guideline
          android:id="@+id/guideline_end"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:orientation="vertical"
          app:layout_constraintGuide_end="16dp" /&gt;
  
      &lt;android.support.constraint.Guideline
          android:id="@+id/guideline_start"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:orientation="vertical"
          app:layout_constraintGuide_begin="16dp" /&gt;
  
      &lt;android.support.constraint.Guideline
          android:id="@+id/guideline_center"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:orientation="vertical"
          app:layout_constraintGuide_begin="180dp"/&gt;
   &lt;/android.support.constraint.ConstraintLayout&gt;
  </code></pre>