EditText is growing as text entered
<p>I have an edittext that is 80% of the screen across and a button that should take the remaining 20%, but when text is entered into the box or removed the edittext grows and shrinks.</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="fill_parent"
   android:orientation="vertical"&gt;

   &lt;LinearLayout
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:orientation="horizontal"
      android:weightSum="100"&gt;

      &lt;Button
         android:id="@+id/people_relationFilterB"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_weight="20" /&gt;

      &lt;EditText
         android:id="@+id/people_searchBoxET"
         android:text="Search Known"
         android:singleLine="true"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_weight="80" /&gt;
   &lt;/LinearLayout&gt;

   &lt;ListView
     android:id="@+id/people_listLV"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content" /&gt;

&lt;/LinearLayout&gt;
</code></pre>

<p>Any Clues? Thanks!</p>
