adobe air app error java.lang.IllegalStateException

[sepehr shi]

when run my android app ( creat by flash cs6 as3 ) error :

An error has occurred in sub: settingm_camera1_ready (java line: 464) java.lang.IllegalStateException:The specified child already has a parent.you must call removeView() on the child s parent first.

my app detects the camera and shot !

this is first code in first frame :

stop();
rec_btn.addEventListener(MouseEvent.CLICK, mouseHandler);
function mouseHandler5(event:MouseEvent):void
{
    gotoAndPlay("stop");
}
videoDetect.attachCamera(null);
videoCapture.attachCamera(null);
NativeApplication.nativeApplication.systemIdleMode = SystemIdleMode.NORMAL;

and this is main code in frame 2 :

import flash.media.Video;
import flash.media.Camera;
import flash.utils.Timer;
import flash.events.TimerEvent;
import flash.display.BitmapData;
import flash.display.Bitmap;
import flash.display.BlendMode;
import flash.filters.ColorMatrixFilter;
import flash.geom.Matrix;
import flash.display.Sprite;
import flash.geom.Rectangle;
import flash.filters.BlurFilter;
import flash.display.Graphics;
import flash.events.Event;
import flash.display.PixelSnapping;
import flash.utils.ByteArray;
import flash.filesystem.File;
import flash.filesystem.FileStream;
import com.adobe.protocols.dict.Database;
import com.adobe.images.PNGEncoder;
import flash.filesystem.FileMode;

NativeApplication.nativeApplication.systemIdleMode = SystemIdleMode.KEEP_AWAKE;

/* INIT VARIABLES */

var timeoutTimerTime:uint = 1500;

var detectWidth:uint = 260;
var detectHeight:uint = 202;

var captureWidth:uint = 800;
var captureHeight:uint = 600;

var minMotionWidth:uint = 20;

var savePath:String = "DCIM/";


/* INIT VIDEOS AND CAMERAS */

var camera:Camera = Camera.getCamera();
camera.setMode(detectWidth, detectHeight, stage.frameRate);

var videoDetect:Video = new Video(detectWidth, detectHeight);
videoDetect.attachCamera(camera);

var captureCamera:Camera = Camera.getCamera();
captureCamera.setMode(captureWidth, captureHeight, 24);

var videoCapture:Video = new Video(captureWidth, captureHeight);
videoCapture.attachCamera(captureCamera);


/* INIT BITMAPS */

var matrix:Array = new Array();
matrix = matrix.concat([9, 0, 0, 0, -255]);
matrix = matrix.concat([0, 9, 0, 0, -255]);
matrix = matrix.concat([0, 0, 9, 0, -255]);
matrix = matrix.concat([0, 0, 0, 1,    0]);

var colorMatrixFilter:ColorMatrixFilter = new ColorMatrixFilter();
colorMatrixFilter.matrix = matrix;

var point:Point = new Point(0, 0);

var bitmapData0:BitmapData = new BitmapData(detectWidth, detectHeight, false,0 );
var bitmapData1:BitmapData = new BitmapData(detectWidth, detectHeight, false, 0);
var bitmapData2:BitmapData = new BitmapData(detectWidth, detectHeight, false, 0);


var bitmap0:Bitmap = new Bitmap(bitmapData0);

var bitmap1:Bitmap = new Bitmap(bitmapData1);
bitmap1.blendMode = BlendMode.DIFFERENCE;

var bitmap2:Bitmap = new Bitmap(bitmapData2);


var container:Sprite = new Sprite();
container.filters = [new BlurFilter(2, 2), colorMatrixFilter];
container.addChild(bitmap0);
container.addChild(bitmap1);

var canvas:Sprite = new Sprite();


/* DISPLAY */

container.x = 226 ;
container.y = 184;
canvas.x = 226;
canvas.y = 184;

addChild(container);
addChild(canvas);

/* TIMER FUNCTIONS */

var rectangle:Rectangle;
var imageTimer:Timer;

var canvasGraphics:Graphics = canvas.graphics;

addEventListener(Event.ENTER_FRAME, enterFrameHandler);

function enterFrameHandler(pEvent:Event):void
{
    bitmapData0.draw(bitmapData1);
    bitmapData1.draw(videoDetect);
    bitmapData2.draw(container);

    rectangle = bitmapData2.getColorBoundsRect(0xffffff, 0x000000, false);

    if(rectangle.width > minMotionWidth && rectangle.height > minMotionWidth)
    {
        canvasGraphics.clear();

        canvasGraphics.lineStyle(0, 0xffffff, 1);
        canvasGraphics.drawRect(rectangle.x, rectangle.y, rectangle.width, rectangle.height);
        canvasGraphics.endFill();

        createImage();
    }
}

/* CREATE IMAGE FUNCTIONS */

var time:String;
var date:Date;
var byteArray:ByteArray;
var file:File;
var fileStream:FileStream;
var hasTimeout:Boolean;
var videoDetectBitmapData:BitmapData;

var timeoutTimer:Timer = new Timer(timeoutTimerTime);
timeoutTimer.addEventListener(TimerEvent.TIMER, timeoutTimerTimerHandler);

function timeoutTimerTimerHandler(e:TimerEvent):void
{
    hasTimeout = false;
}

function createImage():void
{   
    if(!hasTimeout)
    {
        date = new Date();
        time = String(date.fullYear).slice(-2) + ("00" + String(date.month + 1)).slice(-2) + ("00" + String(date.day)).slice(-2) + ("00" + String(date.hours)).slice(-2) + ("00" + String(date.minutes)).slice(-2) + ("00" + String(date.seconds)).slice(-2);

        videoDetectBitmapData = new BitmapData(captureWidth, captureHeight);
        videoDetectBitmapData.draw(videoCapture);

        byteArray = PNGEncoder.encode(videoDetectBitmapData);
        file = File.desktopDirectory.resolvePath(savePath + time + ".png");

        fileStream = new FileStream();
        fileStream.open(file, FileMode.WRITE);
        fileStream.writeBytes(byteArray);

        fileStream.close();
    }

    hasTimeout = true;
    timeoutTimer.start();
}

when I hear the camera shot sound, the error is shown. tanx for help .