title: Cannot see second button
body: <p>I'm trying to create a menu on my home screen but I cannot see the second button that I created. I tried <code>android:layout_below="@+id/score_button"</code> but it gives warning "invalid layout parameter"</p>
  
  <p><strong>Here is my xml file</strong></p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="horizontal" &gt;
  
      &lt;Button
          android:id="@+id/score_button"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:onClick="scoreGame"
          android:text="@string/score_button" /&gt;
  
      &lt;Button
          android:id="@+id/settings_button"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:text="@string/action_settings" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>Something that I've noticed is that whichever button is placed first in the xml file is the one that is displayed when I run the app on my device.</p>
  
  <p>Thanks in advance for any help, much appreciated.</p>