var Shaker = function(f){// 搖一搖: 檢測到3次搖動算一次搖一搖, 搖動后調用處理函數, 不再檢測搖動// f 搖動后的回調this.callback = f;this.status = 0; // 0: 偵聽未開始 1: 偵聽開始 this.speed = 15;this.lastX = this.lastY = this.lastZ = 0;this.num = 0; // 檢測觸發次數this.minNum = 3; // 最小檢測觸發次數this.beginSecond = 0; // 開始檢測的秒數this.maxSecond = 3; // 最大間隔秒數this.handlerWrap = function(){};}Shaker.prototype.listen = function(){// 偵聽搖動var that = this;if (this.status == 0 && window.DeviceMotionEvent) {this.status = 1;this.handlerWrap = function(event){that.handler(event)}window.addEventListener('devicemotion', this.handlerWrap, false);}}Shaker.prototype.release = function(){// 停止偵聽if(this.status == 1){if (window.DeviceMotionEvent) {window.removeEventListener('devicemotion', this.handlerWrap);}this.status = 0;this.num = 0;}}Shaker.prototype.reset = function(){// 重置檢測if(this.status == 1){this.num = 0;}}Shaker.prototype.handler = function(event){// 傳感器事件處理if(this.status == 1){var acceleration =event.accelerationIncludingGravity;var x = acceleration.x;var y = acceleration.y;var z = acceleration.z;if( Math.abs(x-this.lastX) > this.speed || Math.abs(y-this.lastY) > this.speed || Math.abs(z-this.lastZ) > this.speed ) {if(this.num == 0){this.beginSecond = Date.parse(new Date()) / 1000}this.num += 1;}this.lastX = x;this.lastY = y;this.lastZ = z;if(this.num >= this.minNum){var now = Date.parse(new Date()) / 1000;if(now - this.beginSecond <= this.maxSecond){this.release();if(this.callback){this.callback();}}this.reset();}}}

var s = new Shaker(function(){ /*搖動后的回調*/ });s.listen();