[Qt-qml] Can't run app with Qt mobility QML plug in from second time on N9

[david.zhang.liang]

Hi,

I used the Camera QML plugin of Qt mobility.  I works fine the first time on 
N9, allowing me to see the viewfinder.  However, the second time I run this 
application, the Camera element does not work and shows nothing.

I find similar problems when using another Qt mobility QML plugin: 
ContactModel.    

Anyone knows what is the cause of this problem and how it can be solved?

Thanks in advance.

David.  

import QtQuick 1.0
import QtMultimediaKit 1.1

Item {
    id: id_this
    visible: id_const.prototype_mode == id_const.mode_app_camera

    Camera {
             id: id_camera
             x: 0
             y: 0
             width: parent.width  // - stillControls.buttonsPanelWidth
             height: parent.height
             focus: visible //to receive focus and capture key events
         }

}
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