Java. Lang. noclassdeffounderror: org. Apache. ftpserver. ftpserverfactory

From: blog.csdn.net/mad1989/article/details/7619136

1. Remove third-party jar packages from the standard Java compilation path
Right-click the project name and choose Properties> JAVA build path> libraries tag> remove all third-party jar packages other than Android SDK
2. Change the name of the folder where the jar package is located from "lib" to "Libs"
After this is done, ADT can automatically find all jar packages in the libs folder, add them to the Project dependency path, and display them directly under the android dependecies category.
3. Clear the entire project (or not required)
4. After the repair is completed, the system can run normally.