Android：将对象从集合小部件传递到活动

I have a stack widget for my application which currently just launches the main activity when the widget is clicked. I am wanting to change this so the main activity is given information about the widgetitem which was clicked. The object which I want to pass through implements Parcelable and can be successfully passed via an intent from a notification. However, it always seems to be null when bundled in an intent from the widget.I have a stack widget for my application which