title: Layout definition. "You must supply a layout_width attribute."
body: <p>I'm developing a little android app, and I'm having a problem with a layout, I been trying to find the error in my xml, but I couldn't find it... </p>
  
  <p>The error I'm getting is "You must supply a layout_width attribute", but I did it and it still doesn't work...</p>
  
  <p>Here is my XML file:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:orientation="vertical" &gt;
  
      &lt;LinearLayout 
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:orientation="horizontal"
          android:weightSum="100" &gt;
  
      &lt;TextView android:id="@+id/nombreEvento"
          android:layout_height="fill_parent"
          android:layout_weight="70"
      /&gt;
  
      &lt;TextView android:id="@+id/moneda"
          android:layout_height="fill_parent"
          android:layout_weight="10"
      /&gt;
  
      &lt;TextView android:id="@+id/totalEvento"
          android:layout_height="wrap_content"
          android:layout_weight="20"
      /&gt;
      &lt;/LinearLayout&gt;
  
  &lt;TextView android:id="@+id/fecha"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
  /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>