If you are trying to show HTML from a string resource id, the formatting may not show up on screen. If that is happening to you, try using CDATA tags instead:
strings.xml:
<string name="sample_string"><![CDATA[<h2>Title</h2><br><p>Description here</p>]]></string>
...
MainActivity.java:
text.setText(Html.fromHtml(getString(R.string.sample_string));
See this post for further details.