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html5如何獲取手機陀螺儀角度資訊

html5事件中,deviceorientation事件,此事件是檢測裝置方向變化時的事件。其常用屬性為alpha(x)、beta(y)、gamma(z)。
預設將手機垂直,且正面(90度)衝著自己
alpha:左右旋轉
beta:前後旋轉
gamma:扭轉(自轉)

<html>  
<head>  
    <title>DeviceOrientationEvent</title>  
    <meta charset="UTF-8" />  
    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
>
<script src="js/common/jquery.min.js"></script> <script src="js/common/eventutil.js"></script> </head> <body> <div id="arrow"></div> </body> </html> <script> try { var text = ""; window.addEventListener("deviceorientation"
, orientationHandler, false); function orientationHandler(event) { text = "" var arrow = document.getElementById("arrow"); text += "左右旋轉:rotate alpha{" + Math.round(event.alpha) + "deg)<p>"; text += "前後旋轉:rotate beta{" + Math.round(event.beta) + "deg)<p>"
; text += "扭轉裝置:rotate gamma{" + Math.round(event.gamma) + "deg)<p>"; arrow.innerHTML = text; } } catch (e) { $("#arrow").html(e.message) }
</script>