我想知道为什么我正在做的应用程序出错了?当我摇晃电话时,他没有开始演奏。我按照这个网站上的说明进行操作,http://software.intel.com/pt-br/articles/create-handbell-using-html5-and-phonegap,但我不太明白它是如何工作的。这是代码:
<!DOCTYPE HTML>
<html>
<head>
<meta name="viewport" content="width=320; user-scalable=no" />
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<title>BellShapes</title>
<script type="text/javascript" charset="utf-8" src="cordova.js"></script>
<script type="text/javascript" charset="utf-8">
function onLoad(){
// Aguardar o carregamento do Cordova
document.addEventListener("deviceready", onDeviceReady, false);
// inicialização
bellrightring = document.getElementById("bellrightring");
bellleftring = document.getElementById("bellleftring");
bellleft = document.getElementById("bellleft");
bellright = document.getElementById("bellright");
bellcenter = document.getElementById("bellcenter");
// inicialização da mídia
bellsound = new Media("/android_asset/www/resources/bell.mp3",
onRingSuccess(bellsound), onRingError);
bellend = new Media("/android_asset/www/resources/bell-end.mp3",
onRingSuccess(bellend), onRingError);
}
function sign(val, delta) {
if (typeof delta == undefined) delta=0
if (val > 0 && Math.abs(val)-delta > 0) return 1;
else if (val<0 && Math.abs(val)-delta > 0) return -1;
else return 0;
}
function isShaking(last, current, threshold) {
var deltaX = Math.abs(last.x - current.x),
deltaY = Math.abs(last.y - current.y),
deltaZ = Math.abs(last.z - current.z);
return ((deltaX > threshold && deltaY > threshold) ||
(deltaX > threshold && deltaZ > threshold) ||
(deltaY > threshold && deltaZ > threshold) || deltaX > threshold);
}
accelID = navigator.accelerometer.watchAcceleration(onSuccess, onError, options);
function onSuccess(acceleration) {
var x = acceleration.x;
var y = acceleration.y;
var z = acceleration.z;
var t = false;
if (previous){
if (isShaking(previous, acceleration, 10)){
moveBell(sign(x));
bellsound.play();
accelerated = true;
}
else {
stopBell(acceleration);
if (accelerated == true){
bellend.play();
}
accelerated = false;
}
}
previous = acceleration;
}
</script>
</head>
<body id="onLoad">
<div id="handbell">
<div id="bellcenter" class="position"></div>
<div id="bellright" class="position"></div>
<div id="bellleft" class="position"></div>
<div id="bellrightring" class="ring"></div>
<div id="bellleftring" class="ring"></div>
</div>
</body>
</html>
我对javascript了解不多,所以如果您能以更简单的方式解释,我将不胜感激。