I\'m having a problem trying to run an Android app which, up until adding a second external library to its build path, was working fine. Since having added the scoreninja ja
Try this:-
Step 1
Add all the libraries to build pat in Eclipse( means make all libraries referenced libraries)
Step 2
Delete R.java file and again build the project. Don't worry, R.java will automatically get recreated.
Chill :)