title: EditText setError() with no message just the icon
body: <p>Currently I have a really simple code that validates <code>EditText</code> fields and when the user hits the button at the end it checks them. It will put errors in all the fields with this:</p>
  
  <pre><code>if (!emailmatcher.matches()) {
      email.setError("Invalid Email");  
  }
  if (!zipmatcher.matches()) {
      zipcode.setError("Invalid ZipCode");                     
  }
  </code></pre>
  
  <p>My problem that is the keyboard will popup and will move the error bubble to a random place. I was hoping to not have a error bubbles with a message but keep the error icons in invalid <code>EditText</code> fields. I tried inputting <code>setError(null)</code> but that doesn't work. Any Ideas?</p>