Why Does My Android App Throw a 'java.lang.ClassNotFoundException' for My Activity?

java.lang.ClassNotFoundException: Didn't Find Class on Path: dexpathlist

Problem:

While running an Android program utilizing native NDK, users encounter the following error: "java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{package-name}/android.app.CustomActivityName}: java.lang.ClassNotFoundException: Didn't find class "android.app.CustomActivityName" on path".

Cause:

This exception occurs when the specified activity class (CustomActivityName) in the AndroidManifest.xml file is not found in the compiled DEX file.

Solution:

To resolve this issue, verify the following:

• Ensure that the activity class name in the AndroidManifest.xml file is correct and corresponds to the class defined in the source code.
• Check that the activity class is properly declared and implemented in the source code.
• Rebuild the project to generate an updated DEX file that includes the correct activity class.

Additional Considerations:

In some cases, the error may be related to Instant Run. Disabling Instant Run (File -> Settings -> Build, Execution, Deployment -> Instant Run -> Uncheck checkbox) and restarting the app can potentially resolve the issue.

The above is the detailed content of Why Does My Android App Throw a 'java.lang.ClassNotFoundException' for My Activity?. For more information, please follow other related articles on the PHP Chinese website!