大宁摇一摇

1.H5摇一摇事件 window.DeviceMotionEvent

var SHAKE_THRESHOLD = 3000;  
    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('not support mobile event');  
        } 

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) {  
                //摇一摇需要做的事情
                
            }
            last_x = x;  
            last_y = y;  
            last_z = z;  
        }  
    }