Android：从“ java”库扩展的类的java.lang.NoClassDefFoundError

Question

Following is the snap shot of the eclipse's package explorer. I use the opencsv library for the app project. I added the jar to referenced libraries in main project. I define a class 'X' in main project that extends a class from the jar library project.

When I create an instance of class 'X' it gives

java.lang.NoClassDefFoundError

I tried to add the library in Properties>Android>Add... but since the opencsv is a java project and not android library project, it doesnt show up in the list to select.

Somehting missing?

Answer 1

Did you mark that library for export? Properties->Java Build Path->Order and Export?

Answer 2

check private libraries and dependancies as export entities for your library project. see this attachment

Answer 3

You have here 2 possibilities:

1. Transform you opencv project into android library project and bind it as library in your main project

2. Copy & paste the openCSV-2.3.jar in the libs folder from your main project. It will apprears automatically in references libraries