I am getting this exception while I am trying to call an activity from another one. The complete exception is
android.content.ActivityNotFoundExcept
Check out the content of the Android Manifest File in the bin folder of the project. When your app is compiled and packaged the Manifest File is copied to the bin folder. In my case the Manifest in the bin folder did not agree with the original Manifest. This is probably a mistake of Eclipse. I manually copied the Manifest to the bin folder and it worked.