ActionBarSherlock + Maps + Loaders = java.lang.NoClassDefFoundError
Edit: For a detailed how-to, check out my answer . I'm struggling with it for two days now, hope someone can help. I'm trying to use the newest ActionBarSherlock (4.0) with a MapView. I knew it's problematic with fragments, but I don't need them in this activity. But I need Loaders and it appears, that to use Loaders I have to extend the FragmentActivity too. No problem, I thought, we have the android-support-v4-googlemaps from Pete Doyle. As suggested on many SO threads and Google Groups I build the ABS with android-support-v4-googlemaps JAR (android-support-v13-r7-googlemaps.jar actually)