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<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
</head>
<body>
  
 <button>开始游戏</button>
    
  <audio src="https://daoket.github.io/img/load.mp3" id="audio"></audio>
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
  <script type="text/javascript">
    
    $('button').one('touchstart', function () {
        var audio = document.getElementById("audio");
        audio.play();
        audio.setAttribute('src', 'https://daoket.github.io/img/shake.mp3');
        audio.load();
        $(this).text('游戏进行中');
    })
 
    /**
     * 移动端摇一摇
     * @params devicemotion 提供设备加速度信息
     */
    window.addEventListener('devicemotion', devicemotionHandler, false);
 
    var x,
        y,
        z,
        last_x,
        last_y,
        last_z,
        last_time = 0,
        SHAKE_SPEED = 4000;
   function devicemotionHandler (evet) {
       var acc = event.accelerationIncludingGravity,
           curTime = new Date().getTime(),
           diffTime = curTime - last_time;
     
        if (diffTime > 100) {
              last_time = curTime;
            
              x = acc.x;
              y = acc.y;
              z = acc.z;
            
              var speed = Math.abs(x + y + z - last_x - last_y - last_z) / diffTime * 10000;
              if (speed > SHAKE_SPEED) {
                document.getElementById("audio").play()
              }
            
              last_x = x;
              last_y = y;
              last_z = z;
        }
   }
  </script>
</body>
</html>
 
​
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