title: How do I get the background color of a TextView?
body: <p>How do I get the background color of a TextView?</p>
  
  <p>When I press the TextView, I want to change the background color according to the background color that is in use.</p>
  
  <p>TextView does not have a method such as:</p>
  
  <pre><code>getBackgroundResource()
  </code></pre>
  
  <p>Edit:
  I would prefer to get the resId of the background color.</p>