<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<!--wap web页面保持比例不被缩放-->
<title>摇一摇</title>
<script type="text/javascript">
var SHAKE_THRESHOLD = 3000;
var last_update = 0;
var x = y = z = last_x = last_y = last_z = 0;
function init() {
if (window.DeviceMotionEvent) {
window.addEventListener('devicemotion', deviceMotionHandler, false);
} else {
alert('不支持移动事件');
}
}
function deviceMotionHandler(eventData) {
var acceleration = eventData.accelerationIncludingGravity;
var curTime = new Date().getTime();
if ((curTime - last_update) > 100) {
var diffTime = curTime - last_update;
last_update = curTime;
x = acceleration.x;
y = acceleration.y;
z = acceleration.z;
var speed = Math.abs(x + y + z - last_x - last_y - last_z) / diffTime * 10000;
if (speed > SHAKE_THRESHOLD) {
alert("摇动了");
}
last_x = x;
last_y = y;
last_z = z;
}
}
</script>
</head>
<body οnlοad="init()">
<p style="align-content:center">
<h1 style="color:green;align-content:center">
摇一摇手机
</h1>
</p>
</body>
</html>