<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>摇晃判断</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"/>
</head>
<body>
<div id="status">[-请晃动设备-]</div>
<div class="link" style="position:fixed;bottom:20px">
<a href="demo.htm">1、 获取设备信息</a><br />
<a href="demo_1.htm">2、 摇晃判断</a><br />
<a href="demo_2.htm">3、 简易模拟微信摇一摇</a>
</div>
<script>
var SHAKE_THRESHOLD = 800;
var last_update = 0;
var x = y = z = last_x = last_y = last_z = 0;
if (window.DeviceMotionEvent) {
window.addEventListener('devicemotion', deviceMotionHandler, false);
} else {
alert('本设备不支持devicemotion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;
var status = document.getElementById("status");
if (speed > SHAKE_THRESHOLD) {
var text = "x:"+x+"<br />y:"+y+"<br />z:"+z+"<br />speed:"+speed;
status.innerHTML = text;
}
last_x = x;
last_y = y;
last_z = z;
}
}
</script>
</body>
</html>
