Android ClassNotFoundException: Why Can't My App Find My Library?

Android Activity ClassNotFoundException: Troubleshooting the Cause

Dealing with a ClassNotFoundException can be puzzling, but understanding the factors that contribute to this issue can help in identifying and resolving it. One of the common reasons for this exception is incorrect project configuration, specifically when working with Android library projects.

To successfully integrate an Android library project, it's crucial to reference it correctly in the main project. The incorrect method: Adding the library as a dependency in the Java Build Path won't suffice for Android applications.

The solution: Instead, navigate to the main project's Properties, select "Android," and add the library project in the "Library" section. Remember to use a relative path to reference the library. This proper configuration ensures that the necessary resources are accessible to your app.

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