適用於 Adobe® Flash® Platform 的 ActionScript® 3.0 參考
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篩選: AIR 30.0 和更早版本, Flash Player 30.0 和更早版本, Flash Lite 4
Flex 4.6 和更早版本, Flash Pro CS6 和更早版本
隱藏篩選
flash.sensors 

Accelerometer  - AS3

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adobe.utils
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com.adobe.livecycle.ria.security.api
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com.adobe.solutions.acm.authoring.presentation.common
com.adobe.solutions.acm.authoring.presentation.events
com.adobe.solutions.acm.authoring.presentation.fragment
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com.adobe.solutions.exm.authoring.components.toolbars
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com.adobe.solutions.exm.authoring.domain.variable
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com.adobe.solutions.prm.constant
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com.adobe.solutions.prm.presentation.asset
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com.adobe.solutions.prm.presentation.document
com.adobe.solutions.prm.presentation.event
com.adobe.solutions.prm.presentation.file
com.adobe.solutions.prm.presentation.project
com.adobe.solutions.prm.presentation.team
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com.adobe.solutions.rca.constant
com.adobe.solutions.rca.domain
com.adobe.solutions.rca.domain.common
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com.adobe.solutions.rca.presentation
com.adobe.solutions.rca.presentation.comment
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fl.accessibility
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flash.notifications
flash.permissions
flash.printing
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flash.sampler
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flash.sensors
flash.system
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flash.text.engine
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flash.ui
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flash.xml
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語言元素

全域常數
全域函數
運算子
陳述式、關鍵字和指令
特殊類型

附錄

新增內容
編譯器錯誤
編譯器警告
執行階段錯誤
移轉至 ActionScript 3
支援的字元集
僅限 MXML 標籤
移動 XML 元素
Timed Text 標籤
不建議元素清單
AccessibilityImplementation 常數
如何使用 ActionScript 範例
法律聲明
套件flash.sensors
類別public class Accelerometer
繼承Accelerometer Inheritance EventDispatcher Inheritance Object

語言版本: ActionScript 3.0
執行階段版本: AIR 2, Flash Player 10.1, Flash Lite 4

Accelerometer 類別會根據裝置的移動感應器偵測到的活動傳送事件。這個資料代表裝置的位置或是沿著三維軸的移動。當裝置移動時,感應器會偵測此移動並傳回加速資料。Accelerometer 類別提供查詢是否支援加速計的方法,同時也設定加速事件傳送的速率。

注意:請使用 Accelerometer.isSupported 屬性來測試執行階段環境是否有能力使用此功能。雖然 Accelerometer 類別及其成員可供為每個 API 項目所列出的執行階段版本存取,但是執行階段目前的環境會決定此功能的可用性。例如,您可以使用 Accelerometer 類別屬性為 Flash Player 10.1 編譯程式碼,但是您需要使用 Accelerometer.isSupported 屬性,在 Flash Player 執行階段目前的部署環境中,測試 Accelerometer 功能的可用性。如果 Accelerometer.isSupported 在執行階段是 true,則表示 Accelerometer 支援目前存在。

AIR 描述檔支援:僅行動裝置支援此功能。桌面或 AIR for TV 裝置不支援。如需有關跨多個描述檔之 API 支援的詳細資訊,請參閱 AIR 描述檔支援

檢視範例

詳細資訊

相關 API 元素



公用屬性
 屬性定義自
 Inheritedconstructor : Object
類別物件的參照或是特定物件實體的建構函數。
Object
  isSupported : Boolean
[靜態] [唯讀] 如果裝置中可以使用加速計感應器,isSupported 屬性會設定為 True,否則設定為 False。
Accelerometer
  muted : Boolean
[唯讀] 指定使用者已經拒絕存取加速計 (true) 或允許 (false)。
Accelerometer
公用方法
 方法定義自
  
會建立新的 Accelerometer 實體。
Accelerometer
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
會在 EventDispatcher 物件註冊事件偵聽程式,以便讓偵聽程式收到事件的通知。
EventDispatcher
 Inherited
會將事件傳送到事件流程。
EventDispatcher
 Inherited
會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。
EventDispatcher
 Inherited
指出物件是否有已定義的指定屬性。
Object
 Inherited
指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。
Object
 Inherited
指出指定的屬性是否存在,以及是否可列舉。
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
會從 EventDispatcher 物件移除偵聽程式。
EventDispatcher
 Inherited
為迴圈作業設定動態屬性的可用性。
Object
  
setRequestedUpdateInterval 方法用於設定希望的更新時間間隔。
Accelerometer
 Inherited
傳回代表此物件的字串,根據地區特定慣例進行格式化。
Object
 Inherited
會傳回指定之物件的字串形式。
Object
 Inherited
會傳回指定之物件的基本值。
Object
 Inherited
檢查此 EventDispatcher 物件是否已註冊事件偵聽程式,或者此物件的任何祖系已為特定事件類型註冊事件偵聽程式。
EventDispatcher
事件
 事件 摘要 定義自
 Inherited[廣播事件] 當 Flash Player 或 AIR 應用程式取得作業系統焦點並成為作用中時傳送。EventDispatcher
 Inherited[廣播事件] 當 Flash Player 或 AIR 應用程式失去作業系統焦點並成為非作用中時傳送。EventDispatcher
  當加速計變更它的狀態時傳送。Accelerometer
  會傳送 update 事件以回應加速計感應器的更新。Accelerometer
屬性詳細資訊

isSupported

屬性
isSupported:Boolean  [唯讀]

語言版本: ActionScript 3.0
執行階段版本: AIR 2, Flash Player 10.1, Flash Lite 4

如果裝置中可以使用加速計感應器,isSupported 屬性會設定為 True,否則設定為 False



實作
    public static function get isSupported():Boolean

範例  ( 如何使用本範例 )
下列範使用 Accelerometer.isSupported 屬性來測試在執行階段的 Accelerometer 支援。如果目前的環境支援 Accelerometer 功能,則會將事件偵聽程式加入 Accelerometer 物件,而相關聯的處理常式則會在文字欄位中填入時間戳記與加速值。否則,文字欄位會指出在目前環境中不支援該功能。
var myTextField:TextField = new TextField();
myTextField.width = 200;
addChild(myTextField);
var acc1:Accelerometer = new Accelerometer();
var isSupported:Boolean = Accelerometer.isSupported;
checksupport();

function checksupport():void {
    if (isSupported) {
        myTextField.text = "Accelerometer feature supported";
        acc1.addEventListener(AccelerometerEvent.UPDATE, updateHandler);
    } else {
        myTextField.text = "Accelerometer feature not supported";
    }
}

function updateHandler(evt:AccelerometerEvent):void {
    myTextField.text = String("at: " + evt.timestamp + "\n" + "acceleration X: " + evt.accelerationX + "\n" + "acceleration Y: " + evt.accelerationY + "\n" + "acceleration Z: " + evt.accelerationZ);

}

muted

屬性 
muted:Boolean  [唯讀]

語言版本: ActionScript 3.0
執行階段版本: AIR 2, Flash Player 10.1

指定使用者已經拒絕存取加速計 (true) 或允許 (false)。當這個值變更時,會傳送 status 事件。



實作
    public function get muted():Boolean

相關 API 元素

建構函式詳細資料

Accelerometer

()建構函式
public function Accelerometer()

語言版本: ActionScript 3.0
執行階段版本: AIR 2, Flash Player 10.1, Flash Lite 4

會建立新的 Accelerometer 實體。

方法詳細資訊

setRequestedUpdateInterval

()方法
public function setRequestedUpdateInterval(interval:Number):void

語言版本: ActionScript 3.0
執行階段版本: AIR 2, Flash Player 10.1, Flash Lite 4

setRequestedUpdateInterval 方法用於設定希望的更新時間間隔。時間間隔的測量以毫秒為單位。更新間隔僅用於提示以保留電池電力。加速更新之間的實際時間可能大於或小於這個值。在更新間隔中所做的任何變更會影響所有註冊的偵聽程式。 您可以使用 Accelerometer 類別,無需呼叫 setRequestedUpdateInterval() 方法。 在這種情況下,應用程式會根據裝置預設間隔接收更新。

參數

interval:Number — 要求的更新間隔。若 interval 設為 0,將使用最低支援的更新間隔。


擲回值
ArgumentError — 指定的 interval 小於零。
事件詳細資訊

status

事件
事件物件類型: flash.events.StatusEvent
屬性 StatusEvent.type = flash.events.StatusEvent.STATUS

語言版本: ActionScript 3.0
執行階段版本: AIR 2, Flash Player 10.1, Flash Lite 4

當加速計變更它的狀態時傳送。

注意:加速計在某些裝置隨時都可使用。在這類的裝置上,Accelerometer 物件絕對不會傳送 status 事件。

定義 status 事件物件的 type 屬性值。

這個事件具有下列屬性:

屬性
bubblesfalse
cancelablefalse;沒有要取消的預設行為指令。
code物件狀態的說明。
currentTarget正主動使用事件偵聽程式處理 Event 物件的物件。
level訊息的類別,例如 "status""warning""error"
target回報其自身狀態的物件。

update

事件  
事件物件類型: flash.events.AccelerometerEvent
屬性 AccelerometerEvent.type = flash.events.AccelerometerEvent.UPDATE

語言版本: ActionScript 3.0
執行階段版本: AIR 2, Flash Player 10.1, Flash Lite 4

會傳送 update 事件以回應加速計感應器的更新。會在以下情況傳送事件:

  • 當新的偵聽程式函數透過 addEventListener() 附加,這個事件會一次傳遞到所有註冊的偵聽程式,以提供加速計目前的值。
  • 每當加速計依照裝置決定的間隔從平台取得更新時。
  • 每當應用程式遺失加速計的變更時 (例如,執行階段在閒置之後繼續)。

定義 AccelerometerEvent 事件物件的 type 屬性值。

這個事件具有下列屬性:

屬性
bubblesfalse
cancelablefalse;沒有要取消的預設行為指令。
currentTarget正主動使用事件偵聽程式處理 Event 物件的物件。
timestampAccelerometer 更新的時間戳記。
accelerationX沿著 x 軸的加速值 (以 G 為單位,9.8 公尺/秒平方)。
accelerationY沿著 y 軸的加速值 (以 G 為單位,9.8 公尺/秒平方)。
accelerationZ沿著 z 軸的加速值 (以 G 為單位,9.8 公尺/秒平方)。
AccelerometerExample.as

在下列範例中,應用程式會根據加速計 update 事件移動 Sprite。加速計 update 事件會指出裝置的移動。
package 
{
    import flash.display.Sprite;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;
    import flash.events.Event;
    import flash.events.AccelerometerEvent;
    import flash.sensors.Accelerometer;

    public class AccelerometerTest extends Sprite
    {
        private var ball:Sprite;
        private var accelerometer:Accelerometer;        
        private var xSpeed:Number = 0;
        private var ySpeed:Number = 0;
        private const RADIUS = 20;
        
        public final function AccelerometerTest()
        {
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;
            
            createBall();
                                    
            if (Accelerometer.isSupported)
            {
                accelerometer = new Accelerometer();
                accelerometer.addEventListener(AccelerometerEvent.UPDATE, accUpdateHandler);
                stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
            }
        }
        
        private final function createBall():void
        {
             ball = new Sprite();
             ball.graphics.beginFill(0xFF0000);
             ball.graphics.drawCircle(0, 0, RADIUS);
             ball.cacheAsBitmap = true;
             ball.x = stage.stageWidth / 2;
             ball.y = stage.stageHeight / 2;
             addChild(ball);
        }

        private final function enterFrameHandler(event:Event):void
        {
            event.stopPropagation();
            moveBall();
        }
        private final function moveBall():void
        {
            var newX:Number = ball.x + xSpeed;
            var newY:Number = ball.y + ySpeed;
            if (newX < 20)
            {
                ball.x = RADIUS;
                xSpeed = 0;
            }
            else if (newX > stage.stageWidth - RADIUS)
            {
                ball.x = stage.stageWidth - RADIUS;
                xSpeed = 0;
            }
            else
            {
                ball.x += xSpeed;
            }
            
            if (newY < RADIUS)
            {
                ball.y = RADIUS;
                ySpeed = 0;
            }
            else if (newY > stage.stageHeight - RADIUS)
            {
                ball.y = stage.stageHeight - RADIUS;
                ySpeed = 0;
            }
            else
            {
                ball.y += ySpeed;
            }
        }

        private final function accUpdateHandler(event:AccelerometerEvent):void
        {
            xSpeed -= event.accelerationX * 2;
            ySpeed += event.accelerationY * 2;
        }
    }
}




[ X ]為什麼顯示英文?
「ActionScript 3.0 參考」的內容是以英文顯示

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