I have an activitygroup managing a number of child activities. I would like to pause/resume child activities when they go off/on the screen just like they were top-level activities. How can I do this? From the documentation it seems as if moving focus from Activity A to Activity B should pause Activity A, but I am not seeing this behavior. The LocalActivityManager source uses ActivityThread, but this appears not to be exposed for developer usage.
How can I programatically pause/resume an ActivityGroup's child activity?