一(yī)、PhoneGap 加速計(j&λ♠ì)Accelerometer &nb✘€sp; §β ₽ ↕; &nb₽€∑≤sp; 對(duì)象介紹
主要(yào)方法
accelerometer.getCurrentAccelerat ™'ion 獲取當前設備在x，y，z 軸上(shàng)的(↑βde)加速度信息
accelerometer.watchAcceleration Ω←±£定期獲取設備的(de)加速度信息
accelerometer.clearWatch &n ÷bsp; 停止定期 ♣<×獲取設備的(de)加速度信息
參數(shù)
accelerometerSuccess 獲取加速度信息γ♥成功的(de)回調函數(shù)
accelerometerError 獲取加速度信息失敗☆→的(de)回調函數(shù)
acceε"©↑lerometerOptions
一(yī)般為(wèi♥♣≥)json 對(duì)象，frequency 是(shì)它↑•目前的(de)唯一(yī)參數(shù)，以毫秒(miǎo)數(shù♠™₽)表示，用(yòng)來(lái)指定定期★★獲取
加速度信息頻(pín)率
二、獲取加速度信息
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="α→γ;Content-Type" content=&qu≠©←£ot;text/html; charset=utf-8">
<title>Acceleration 例子(zǐ)&¥¥↑lt;/title>
<script type="text/javascript&q© uot; charset="utf-8"•β$ ; src="cordova.js&≥®$ quot;></script>
<script type="text/ja↑₹vascript" charset=&'♠₹"utf-8">
----------------------- P♦∞∞age 2-----------------------♦σ>
// 等待PhoneGaσ↑p 加載
document.addEventListener("deviceλ₹±&ready", onDeviceReady, false);
// 加←$載完成
&nb≥₹sp; function onDeviceReady() {
navigator.accelerometer.getC ↑™©urrentAcceleration(onSu£ccess, onError);
}∑∞
// 獲取加速度§©信息成功後的(de)回調函數(shù)
// 接收包含當前加速¥™'±度信息的(de)Acceleration 對(duì)象
functioγ✔↕n onSuccess(acceleration) {
&n↔<bsp; alert('X 軸方向的←>"α(de)加速度: ' + acceleration.x + '\">n' +
&n<±λ™bsp; &nb®∞αsp; &nbs↔↑₽p; 'Y 軸方向的(de)加速度: ' + acו✔↓celeration.y + '\n' +
&n♦λλbsp; &nbs★£πp; δΩ; 'Z 軸方向的(de)加速度: ' + acc≠λ'★eleration.z + '\n' +
&nbs>₹±p; €←; ♦¶↕© '時(shí)間(jiān)戳: ' π♣←; &n×α↓bsp; + acceleration.times$¶♥tamp + '\n');
}
// 獲取加速度信 Ω息失敗後的(de)回調函數(shù)
fun¥÷∑ction onError() {
&n<∏•¶bsp; alert('出錯(cuò)了(le)!♥®');
&nb>¥β∑sp; }
</script>
</head>
<body>
<h1>例子(zǐ)</h1>
<p>獲取當前的(de)加速度"÷信息</p>
</body>
</html>
三．定期獲取加速度信息
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Conteγ↑nt-Type" content="σ;text/html; charset=utf-8&qu±"×σot;>
<title>Acceleration &n→γ₹®bsp; 例子(zǐ)</title&λ≥α☆gt;
<script type="te≈ ♣xt/javascript" cha←©rset="utf-8" src=✘σ'"cordova.js">&l&&₽t;/script>
<script type="text/javasc₹α÷'ript" charset="utf-8"&δ↕ gt;
----------------------- Page 3------- ©----------------
/←≈/ 當前watchAccelerati≈on 的(de)引用(yòng)ID
varwatchID = null;
// 等待Pho↕≤γneGap 加載
document.addEventListener("deviπαceready", onDeviceReady ≥↔£, false);
// 加載完成
∑★; function onDeviceReady() {
startWatch();
&•γ nbsp; }
₽✔ ♦; // 開(kāi)始監測
"α± function startWatch() {
&£♥∏nbsp; //&nbs' ₽p; 每隔三秒(miǎo)更新一(yī)次信息
var options = { frequency: 3000 };
watchID = navigator.acceler₹↓δometer.watchAcceleration(onSucc≥γess, onError, options);
&nb↕↓sp; }
// ≤™; 停止監測
♥; function stopWat₽€ch() {
×← &nb> sp; if (watchID) {
navigator.accelerometer.clearWatch(watλ<™♥chID);
watchID = null;
&nπ÷bsp; ≥γ§; }
&nbs←¶βp; }
☆β // 獲取加速度信息成功後的(de)回調函數(sh<₩↕ù)
•™// 接收包含當前加速度信息∞ 的(de)Acceleration 對(duì)象↑±₽
$•; function onSuccess(acc♥€eleration) {
var element = documen★π't.getElementById('accelerometer');
element.innerHTML = 'X 軸方λ'₹¶向的(de)加速度: ' + accel∑&eration.x + '<br />' +
&£★ πnbsp; δ↔$¶ β ; ← →♣ ∑" §; ¶" ©; 'Y 軸方向的(de)加速度: ' + acceleration.y + ✔ε§>'<br />' +
&↑ε↔nbsp; &nb&♣πsp; &nbs₽±÷p; &nbs≤→Ω∑p; >↑ φ'¶; ♥σ± 'Z 軸方向的(de)加速度: $απ' + acceleration.z + '<br />'ε∑σ +
&nb≤₽≥sp; &₽↑✔nbsp; ↑↓; &nγ™bsp; &n×→<÷bsp; &nbs☆"p; '時↔≠σ(shí)間(jiān)戳: ' ♣$↓ &n♠∑bsp; + acce>£↕leration.timestamp +↓→ '<br />';
}
// 獲取加速γ₹度信息失敗後的(de)回調函數(shù)
&nbsλ£p; function onError() {
alert('onError!');
✘ }
----------------------- Page 4----©≠↕♥-------------------
</script>
</head>
<body>
<div id="accelerometer">✔☆™;監測加速度信息中...</divγ★>
<button"stopWatch();"∞>停止監測加速度信息</button>♠ ¥;
</body>
</html>
四．搖一(yī)搖
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv=&qu☆ ot;Content-Type" cont↑§π☆ent="text/html; charset☆ ≤=UTF-8">
<title>Acceleratio§≥≥n 例子(₹♠zǐ)</title>
<script type="σβ<text/javascript" charset≤Ω="utf-8" src="cord×₩↔↑ova-1.5.0.js"></s±§±cript>
<script type="tφ∑ext/javascript" charse$♦t="utf-8">
varwatchID = null;
document.addEventListener(&quo©λt;deviceready",'✘ onDeviceReady, false);
¥σ€ varoldValue = {
&nb★§↕sp; x: null,
☆♣€ y: null,
♥≥; z: null
}
&nbs✔p; function onDeviceReady() {
startWatch();
&nbs• ✔p; }
λσ; function startWatch() {
var options = { frequency: 300 };
watchID = navigator.accelδ•φerometer.watchAcceleration(onSucc★ δess, onError, options);
}
✘←λ∏; function stopWatch() {
&nb¥"sp; &nbs§✔p; if (watchID) {₹₹∑
navigator.accelerometer.clearWatc§§±h(watchID);
--------------------β≈$±--- Page 5-----------------------
watchID = null;
&nb→ ≠sp; &nbλ<sp; }
™↕σ }
₹↔ ✔ // 獲取加速度信息成功後的(de)回調函數(shù)¶↓∞£
&n>↑>bsp; function onSuccess(newValue) {φ
÷✘var changes = {},
&nb♣♦¥®sp; &nb÷"$πsp; bound = 3;
&n<φ↔γbsp; ±← if (oldVal✘∑ue.x !== null) {
&n $bsp; &nbs ↓ p; &nbs∑∏♦ p; changes.x = Math.abs(ol♣•"dValue.x, newValue.x);
&nbs $p; &nb×≥λ→sp; changes.y = Math.abs™≈¶✔(oldValue.y, newValue•≠≠♠.y);
&•σnbsp; &n©•bsp; changes.z = Math.abs(oldVa÷φ>πlue.z, newValue.z);
&nbsγββ¶p; ✔δ¶÷ }
&nb♦ ≤λsp; →© if (changes.↕×x> bound &&changes.y&↓↓gt; bound &&ch≥₩anges.z>
&nbs €σp; ₽δ boun♦ε $d) {
&nbsπ↓p; <α₩; alert('檢測到(dào)手機(j©>ī)晃動');
&nb÷≠$sp; &n>&bsp; }
&↑↓nbsp; ✔↓$; oldValue = ✔£•→{
&♦£nbsp; &nbsφ≥≤δp; ✔•≈↓ x: newValue.x,
'γ₩ •δ>₹; y: newValue.y,
&nb™φsp; & <©nbsp; π™λ↔ z: newValue.z
&nb™©™÷sp; &nb∞↕¶sp; →; }
var element = document.getEle™↑✔♠mentById('accelerometer');
element.innerHTML = 'Acceleration ↑$X: ' + newValue.x + '<br />←←®' +
&nb★∑☆sp; &nbs×$p; ✘∑✘¥; >ק &nπ≈§bsp; &nb'∑ sp; &n↑✔bsp; & >nbsp; 'Acceleration Y:₩₩ ' + newValue.y + '<br />' +
&nbs♣☆p; '♦♠♠ 'εγ; &n₹γbsp; ε♠; &<×nbsp; &nbs≈δp; ↔βε 'Acceleration Z: ' + neδ→™wValue.z + '<br />' +
₹↕ ×; &↑✘↔βnbsp; &§♠γnbsp; &n'♠±bsp; &©₽>nbsp; &nbs↑↑®∞p; &nb ↓≈sp; &nb↕$sp; 'Timestamp: ' &n¥↔φ"bsp; &nbs↑÷§"p; + newValue.timestamp +≤✘∏ε '<br />';
&n♦∞¶bsp; }
&nb ×÷sp; // 獲取加速度信息失∏€™敗後的(de)回調函數(shù)
€♠&¶function onError() {
alert('onError!');
&nγδ☆'bsp; }
</script>
</head>
<body>
<div id="accelerometer&≤ ♦βquot;>監測加速度信息中...</div><↔↓
<button"stopWatch•ε();">停止監測加速度信息&₽</button>
</body>
</html>
----------------------- Page 6-$ •≥----------------------
五．重力感應
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-€★₹♥Type" content="text/ht→™ml; charset=UTF-8">"↕∞♦;
<title>Acceleration $≠ 例子(zǐ)</title>
<style type="text/cssφ✘">
©↓ #ball {
×÷position: absolute;
&×₩↑£nbsp; z-index: 0;
& ≤→≥nbsp; left: 20px;
γασ ; top: 100px;
&nb " sp; background: #f00;
}
</style>
<script type="te ©∞≈xt/javascript" c★φ≤≈harset="utf-8" src="cord↓ova-1.5.0.js"></script>
<script type="text/java¶§Ωscript" charset=" ¥•utf-8">
varwatchID = null;
document.addEventListener(φ≤ε"deviceready", onDevi≥ceReady, false);
&n☆φ✔bsp; function drawCi™"σ☆rcle(x,y) {
va$£₩→rctx = document.getElementById(& €β≈quot;ball").getContext('2d↔♥ ');
&nb₹∏≠βsp; varrd = 10;
&n≠ bsp; ctx.beginPa€ γth();
↑↓ &nbββ₽sp; ctx.arc(x, y, rd, δ☆↑0, Math.PI * 2, false);
ctx.clo©≤←§sePath();
&nbs₹♦p; ctx.fillStyle =•£ "yellow";
ctx.fλ δ¥ill();
}
funcλδtion clear() {
va≠'₹rctx = document.getElementBy€←Id("ball").getContext('2d'€ε);
✘δ ctx.clearRect(0,0,200,200);
}
&nbs↔←>p; function onDevic∏¥→"eReady() {
drβ™λ☆awCircle(10,10);
startWatch();
-----------------------₩ & Page 7--------------------- ≈--
}
&nγ§'₽bsp; function startWatch() {
var options = { frequency: 4∑&★0 };
watchID = navigator.accelerom→"λ₹eter.watchAcceleration(onSuccγπ←ess, onError, option∏→ s);
&nbδδλ☆sp; }
fu♦≤↓♠nction stopWatch() {
&nε¥bsp; ×™©✘if (watchID) {
navigator.accelerometer.clearWa≥"♥ tch(watchID);
watchID = null;
&n©×α✔bsp; ™↔÷ }
&nb↓♦πsp; }
'♣β varoldX = 10, oldY = 10;
♦<; // 獲取加速度信息成功後的(deλγ≠✘)回調函數(shù)
"≠©≈ function onSuccess(newVal↑×≠ue) {
&$♦nbsp; &nb♥♥₹←sp; if(10<=oldX<180&α÷≥&10<=oldY<180){
&nb←×±×sp; δγβ '₽α; clear(≠€₽λ);
§¶≥ >λ≤ dr✘δΩ©awCircle(oldX,oldY);
&nbs p; &nbs•σp; }
&nb ≤✔☆sp; ¶$✘; oldX -= newVa¥↔♥♥lue.x;
&nb ✔₹™sp; ∏€αoldY += newValue.y;
var element = document.getElementByIα ₩"d('accelerometer');
element.innerHTML = σΩ'X: ' + oldX + '<br /λ$↑$>' +
≠• ₹® &nπ$bsp; &nbsφ£÷☆p; &♣→₩♥nbsp; &nbs♣<•←p; &nbsγp; &nb$↔÷sp; 'Y: ' + oldY + '<br />'×≈ ;
₩$; }
&nb∏✘sp; // 獲取加速度信息失敗後的(de)回調函數(shù)
functi™↑'on onError() {
alert('onError!');
&nβ"bsp; }
</script>
</head>
<body>
<div id="accelerometer"↕☆↔;>開(kāi)啓重力感應...<δ£σ/div>
<button"stopWatch();">₽π;停止重力感應</button>
<canvas id="ball" width∏π∞σ="200" height="20¥× 0"></canvas>
</body>
</html>
