<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no"/>
<meta name="format-detection"content="telephone=no">
<title>html5 Gravity Sensing Event</title>
</head>
<body>
<p>Shake to trigger html5 gravity sensing event</p>
<div id="j"></div>
<script type="text/javascript">
if (window.DeviceMotionEvent) {
window.addEventListener('devicemotion',deviceMotionHandler, false);
}
var speed = 1;//speed
var x = y = z = lastX = lastY = lastZ = 0;
function deviceMotionHandler(eventData) {
var acceleration =eventData.accelerationIncludingGravity;
x = acceleration.x;
y = acceleration.y;
z = acceleration.z;
//document.getElementById("j").innerHTML = "\n "+Math.abs(x-lastX)+"\n"+Math.abs(y-lastY)+"\n"+Math.abs(z-lastZ);
if(Math.abs(x-lastX) > speed || Math.abs(y-lastY) > speed || Math.abs(z-lastZ) > speed) {
//Simple shake trigger code
//alert('Triggered gravity sensor');
document.getElementById("j").innerHTML = "\n "+Math.abs(x-lastX);
}
lastX = x;
lastY=y;
lastZ = z;
}
</script>
</body>
</html>
refer to:
http://www.haorooms.com/post/html5_DeviceMotionEvent