title: TextView with different textSize
body: <p>Is this possible to set different textSize in one TextView?  I know that I can change text style using:</p>
  
  <pre><code>TextView textView = (TextView) findViewById(R.id.textView);
  Spannable span = new SpannableString(textView.getText());
  span.setSpan(arg0, 1, 10, arg3);
  textView.setText(span)
  </code></pre>
  
  <p>I know the range start...end of text I want to change size. But what can I use as <code>arg0</code> and <code>arg3</code>?</p>