title: Button highlight in android
body: <p>I have the following code for a button in the layout file for my application</p>
  
  <pre><code>&lt;Button
      android:id="@+id/button2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentBottom="true"
      android:layout_alignParentRight="true"
      android:text="Start updating" /&gt;
  </code></pre>
  
  <p>By default when the button is pressed its highlight color is blue. How do I change that to the color I want?(i want it to be crimson)</p>