title: What's the difference between fill_parent and wrap_content?
body: <p>In Android, when layout out widgets, what's the difference between <code>fill_parent</code> (<code>match_parent</code> in API Level 8 and higher) and <code>wrap_content</code>?</p>
  
  <p>Is there any documentation where you can point to? I'm interested in understanding it very well.</p>