title: Custom Button in XML
body: <p>I made this XML file to customize a button </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;shape xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="rectangle" &gt;
  
  &lt;corners android:radius="10dip" /&gt;
  
  &lt;gradient
      android:angle="90"
      android:centerColor="#0043E1"
      android:centerY="0.4"
      android:endColor="#6495ED"
      android:startColor="#6495ED"
      android:type="linear" /&gt;
  
  &lt;/shape&gt;
  </code></pre>
  
  <p>What should I add to make the state focus and pressed please? A gradient color for the state pressed, and another for the state focused?</p>