title: What is textview.setTextSize()?
body: <p>In my android game, there is a textview. I am setting the text size using following code.</p>
  
  <pre><code>textview.setTextSize(30);
  </code></pre>
  
  <p><code>30</code> is in pixels. But what exactly it is ? Is it the height or width of a character ? Is it ordinal no. ?</p>