title: How do you update the screen after you change the text with a setText?
body: <p>Right now I am using the following code to update a <code>TextView</code></p>
  
  <pre><code>txtMain.setText("new text");
  </code></pre>
  
  <p>After that code executes, the screen does not update with the new text. Is there a way I can force the text to update right then and there?</p>