I am very new to Android development. Now am facing this problem in Java Eclipse,
Error generating final archive: Debug Certificate expired on 1/11/12 12:52 PM Unknown Android Packaging Problem
I searched in google and found the answer for my problem from this link "Debug certificate expired" error in Eclipse Android plugins. They gave the answer for my question. I am using Eclipse in Mac OS X. They gave solution that to delete debug.key from Preferences - Android - Build - Default debug keystore . I found the ~/.android/debug.keystorefrom that location and i tried to delete debug.keystore from Default debug keystore: but, i can't delete it from that location because it is not editable. Can anyone please solve my problem? Thanks in advance.
Just rename or delete it manually in a terminal with: rm ~/.android/debug.keystore or mv ~/.android/debug.keystore ~/.android/debug.keystore-backup
Or have a look at this thread
来源：https://stackoverflow.com/questions/8893989/how-to-find-android-debug-keystore-in-mac-os-x-for-android