android debugging이 안될 때

http://arabiannight.tistory.com/entry/%EC%95%88%EB%93%9C%EB%A1%9C%EC%9D%B4%EB%93%9CAndroid-Debug-%EB%AA%A8%EB%93%9C%EA%B0%80-%EC%95%88-%EA%B1%B8%EB%A6%B4-%EA%B2%BD%EC%9A%B0

android:debuggable="true"    

http://onjo.tistory.com/2097

다른 경우 해결책

debugging 안되고, library project에 apk를 찾을 수 없다고 경고가 출력됐다.

http://stackoverflow.com/questions/4778113/android-eclipse-could-not-find-apk

http://www.winksaville.com/blog/android/android-eclipse-could-not-find-xxxxapk/

the solution appears to be to remove the project and import it again.

내 경우에는 eclipse를 껐다 켰더니, 잘 작동했다 -0-.