“Unable to instantiate activity” error

Question

One of my Android apps has about 100,000 users and, about 10 times a week, I get the following exception being reported to me via Google\'s market tool:

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Answer 1

It may happen that the app works fine on your eclipse and mobile, when you install it from eclipse but may crash when in the market (Happened to me), if the same happens to you, there are 2 things you need to do and you will get out of this situation.

1. Clean the project and rebuild. (Using Project-Clean)
2. Delete and re-include the libraries, if any.