I'm working on an application that uses QCAR however it doesn't use it quite like the samples that come with the sdk. The ar view is only one part of the app and it shows it in an activity that can potentially be created and destroyed several times. However from time to time the app will freeze up when showing the ar view and become non-responsive and then will display the app not responding dialog. After I force close the app and reopen and go to the activity that uses QCAR I get the following exception:
java.lang.RuntimeException: Fail to connect to camera service
Also the native android calendar app doesn't even work and shows a dialog stating it can't connect to the camera. Anyone have any idea why this might be happening? Also, I noticed this happens most frequently on my Nexus S, if that helps.