Why is my Android app throwing a ClassNotFoundException for EasterSimonSaysActivity?

Android's ClassNotFoundException: activity name is a common error that occurs when the specified activity class cannot be found by the Android system. In the provided code, you're experiencing this issue with the "EasterSimonSaysActivity" class.

Upon examination, the activity class, manifest entries, and dependencies appear to be configured correctly. However, the issue may lie in how the Android library project is referenced in the main project within Eclipse.

Incorrect Approach:

Adding the library project as a dependency through "Java Build Path -> Projects" does not work for Android-related projects.

Correct Approach:

Navigate to the main project's "Properties -> Android" and add the library project under the "Library" section. Ensure that the path used is a relative path, as stated in the official Android documentation.

By following these steps, your problem should be resolved, as the Android system will be able to correctly locate the "EasterSimonSaysActivity" class when launching the application.

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