Flex (flash) detects three States of the camera (whether it is occupied, no camera is installed, normal)

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In the videoProgramDuring the preparation process, we often need to use the camera. before using the camera, it is necessary to check the current status of the camera:

1. Occupied

2. No camera is installed

3. Normal

 

See the following:Code:

<? XML version = "1.0" encoding = "UTF-8"?>
<Mx: Export wedapplication xmlns: MX = "http://www.adobe.com/2006/mxml"
Layout = "absolute" creationcomplete = "Init ()">

<Mx: SCRIPT>
<! [CDATA [

Import MX. Controls. Alert;
Private var camera: camera;
Private var isexistscamera: Boolean = false;
Private var isbusycamera: Boolean = false;
Private var intervalid: uint;
Private var times: int;

Private function Init (): void
{
Camera = camera. getcamera ();
If (CAMERA = NULL)
{
If (camera. Names. Length <= 0)
{
This. isexistscamera = false;
Alert. Show ("no camera installed ");
}
}
Else
{
This. vdpaly. attachcamera (this. Camera );
This. iscamerabusy ();
}
}

Private function iscamerabusy (): void
{
This. intervalid = setinterval (callback, 50 );
}

 

Private function callback (): void
{
Trace ("currentfps =" + camera. currentfps. tostring ());

If (camera. currentfps> 0)
{
// Video device available
Clearinterval (this. intervalid );
This. isbusycamera = false;
Alert. Show ("normal camera ");
}
Else
{
Times ++;
Trace ("Times =" + times. tostring ());

If (times> 30)
{
// Video Device Busy
Clearinterval (intervalid );
This. isbusycamera = true;
Alert. Show ("camera occupied ");
}
}
}

 

Private function Cl (): void
{
Alert. Show (this. Camera. currentfps. tostring ());
}

 

]>
</MX: SCRIPT>

<Mx: videodisplay id = "vdpaly" Click = "Cl ()" x = "44" Y = "64" width = "232" Height = "236"/>

</MX: Using wedapplication>

 

Code Description:

Camera = NULL, the camera is not installed

If the camera is occupied, the camera. currentfps is definitely not greater than 0, but equal to 0.

 

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