Problem occurs for me with projects which use Support library.
This thread helped me a lot to resolve ClassNotFoundException
issue with ADT 22:
https://code.google.com/p/android/issues/detail?id=55304
The idea is to enable Android Private Libraries on Java Buils Path | Order and Export
Nikolay’s workaround works for me:
For all projects (app and library):
- Right click the project, and choose Properties
- Go to Java Build Path-Order and Export.
- Tick ‘Android Private Libraries’
- (Optional) Clean all projects if necessary
Thanks, Nikolay.