Archived:How to check if the native Symbian camera app is running

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Compatibility

Platform(s): S60 3rd Edition

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Article

Created: User:Technical writer 1 (08 Feb 2008)

Last edited: hamishwillee (14 Sep 2012)

Description

In order to find out whether the Camera application is running, TApaTaskList class can be used to retrieve a list of currently running tasks.

Note that on some devices, such as the Nokia N93 and the Nokia N93i, the Camera task is always running in the background and only hidden from the list of active task when in background.

Solution

The following function returns ETrue if the Camera is running and not hidden from the list of active tasks.

Capability requirements: none

  #include <apgtask.h>      // link against apgrfx.lib
  #include <apgwgnam.h>
 
  // The UID of the native camera application
  const TUid KNativeCameraAppUID = { 0x101ffa86 }; 
 
  TBool CheckCameraStatusL()
    {
    TUid id( KNativeCameraAppUID );
    TApaTaskList taskList( iWsSession ); // iWsSession is of type RWsSession
    TApaTask task = taskList.FindApp( id );
 
    if( task.Exists() )
      {
      CApaWindowGroupName* wgName = 
        CApaWindowGroupName::NewLC( iWsSession, task.WgId() );
 
      TBool isHidden = wgName->Hidden();
      CleanupStack::PopAndDestroy(); // wgName
 
      if(!isHidden)
        {
        return ETrue;
        }
      }
    return EFalse;
    }