Cacher is the code snippet organizer for pro developers

var ua = navigator.userAgent.toLowerCase();
var isAndroid = ua.indexOf("android") > -1; //&& ua.indexOf("mobile");
if(isAndroid) {
	// Do something!
	// Redirect to Android-site?
	window.location = 'http://android.davidwalsh.name';
}

<?php
$ua = strtolower($_SERVER['HTTP_USER_AGENT']);
if(stripos($ua,'android') !== false) { // && stripos($ua,'mobile') !== false) {
	header('Location: http://android.davidwalsh.name');
	exit();
}