title: Android: When to end class with finish()?
body: <p>I often see examples of classes which end with <code>finish()</code>, but definitely not always. My question is when should you end a class with <code>finish()</code>? And what does it do exactly, what is the difference between ending a class with the back button and ending it with <code>finish()</code>?</p>
  
  <p>Thanks in advance!</p>