(Java. Lang. noclassdeffounderror:) unable to resolve superclass of lcom

When performing operations on a map, it may take me almost two things but it may take me a little time to get started:

If you search for the above error, you will find out how to use the jar package, delete the package, and then re-load ...... This will solve the problem.

However, when you encounter this error, there should be a sentence out of brackets: unable to resolve superclass of lcom

Solution:

View the error cause in ddms:
05-23 03:07:09. 844: Warn/dalvikvm (992): unable to resolve superclass of lcom/join/Joy/earthquakedetailsview; (14)
05-23 03:07:09. 844: Warn/dalvikvm (992): link of class 'lcom/join/Joy/earthquakedetailsview; 'failed
03:07:09-23. 854: Error/dalvikvm (992): cocould not find class 'com. join. joy. earthquakedetailsview ', referenced from method com. join. joy. earthquakewatcher $1. onitemlongclick
The error is that the class inherited from mapactivity cannot be found, but the previous warning message "unable to resolve superclass of" is returned"
The reason is that the superclass of this class cannot be found.
Because Google map uses classes related to Google Map, and Google map is a separate library, it must be imported before use,
Therefore, add <Application> </Application> in the manifest. xml file
<Uses-library Android: Name = "com. Google. Android. Maps"/>