How to use the font with classes

Look for any icon and copy the class name (e.g. "ai-twitter").
Add it as the class of any HTML container (e.g. "span") 
<span class="ai-twitter"></span>
Result:

How to use the font with Unicodes/HTML-entities

Look for any icon and copy the Unicode/HTML-entity (e.g. "ai-twitter").
Give the element itself or its parent the font-family "androidicons" and insert the Unicode/HTML-entity 
<span style="font-family: 'androidicons'">
  &#xe8e4; <!-- Unicode -->
  &#59620; <!-- HTML-Entity -->
</span>
Result:

Examples with styled icons

HTML: 
<ul class="icons">
  <li class="ai-twitter">Twitter</li>
  <li class="ai-facebook">Facebook</li>
  <li class="ai-dropbox">Dropbox</li>
</ul>
CSS: 
.icons li {
  color: #ff6600;
  font-size: 30px;
}
Result: