html5 实现手机摇一摇功能（B） 

<!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>

 

posted @ 2015-07-13 12:28  捅了个浆糊  阅读(218)  评论(0)    收藏  举报