How to Fix 'NoClassDefFoundError' in Eclipse Android Development After Adding External Libraries?

Resolving NoClassDefFoundError in Eclipse Android Development

When attempting to run an Android application after integrating an external library, developers occasionally encounter a "NoClassDefFoundError." This exception points to a missing class despite its presence in the JAR file. To address this issue, consider the following solution:

Renaming Library Folder

After updating Android Development Tools (ADT), it has been observed that Eclipse searches for library JAR files in a folder named "libs." Previously, storing JARs in a "lib" folder and adding them manually to the build path worked.

To resolve the NoClassDefFoundError, remove the JARs from the build path and rename the "lib" folder to "libs." This convention aligns with Ant, allowing ADT's latest version to detect and include libraries in the generated APK file.

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