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    <p>The problem is that when you change orientations a new activity is spun up from the beginning (onCreate). Your long running process has a handle to the old (no longer visible) activity. You are properly updating the old activity but since it isn't on screen anymore, you don't see it.</p> <p>This is not an easy problem to fix. There is a library out there that may help you though. It is called DroidFu. Here is a blog post that (much more accurately than I) describes the root cause of what you are seeing and how the DroidFu library combats it: <a href="http://brainflush.wordpress.com/2009/11/16/introducing-droid-fu-for-android-betteractivity-betterservice-and-betterasynctask/" rel="nofollow noreferrer">http://brainflush.wordpress.com/2009/11/16/introducing-droid-fu-for-android-betteractivity-betterservice-and-betterasynctask/</a></p> <p>Edit: (Adding code for tracking active activity)</p> <p>In your application class add this:</p> <pre><code>private Activity _activeActivity; public void setActiveActivity(Activity activity) { _activeActivity = activity; } public Activity getActiveActivity() { return _activeActivity; } </code></pre> <p>In your Activities, add this:</p> <pre><code>@Override public void onResume() { super.onResume(); ((MyApplicationClassName)getApplication()).setActiveActivity(this); } </code></pre> <p>Now you can get the active activity by calling MyApplicationClassName.getActiveActivity();</p> <p>This is not how DroidFu does it. DroidFu sets the active activity in onCreate but I don't feel that is very robust.</p>
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    1. COHmm... that seems very helpful, but there doesn't seem to be a lot of documentation? I would hate to change my implementation to using DroidFu and not know how to resolve a problem because it isn't the "typical" way of doing things.
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    2. COYeah, it appears to be an old abandoned library but the premise seems sound. You could do this without using the library. Basically the Application object keeps track of the active Activity (using onResume). Then, when you are ready to notify your adapter, you get the active Activity from the Application, check to see if it is an instanceof your expected activity and if so, cast and notify.
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    3. COWhat exactly is the code for tracking the "active Activity"? That is, should I be doing something like CurrentActivity act = new CurrentActivity(); then passing act to the Application class?
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