title: Format currency dynamically on TextView
body: <p>I'm trying to dynamically format the value entered by the user on a <code>TextView</code>, specifically what I am trying to do is:</p>
  
  <pre><code>1. TextView text = ""
  2. User entered = "4"
  3. TextView text = 0.04
  4. User entered = "5"
  5. TextView text = 0.45
  6. User entered = "6"
  7. TextView text = 4.56
  </code></pre>
  
  <p>and so on...</p>
  
  <p>I'm using the <code>onTextChanged</code>method stub from <code>TextWatcher</code>, although I don't know how to implement this logic.</p>
  
  <p>What is the simplest way to implement this feature?</p>