“Debug certificate expired” error in Android plugins in Eclispe

Problem: 
Error on Console

[2013-01-03 10:31:14 - androidTest]Error generating final archive:
Debug certificate expired on 1/03/13 12:35 AM!

Solution:- 

Solution 1:

Delete your debug certificate under ~/.android/debug.keystore on Linux and Mac OS X; the directory is something like %USERPROFILE%/.androidon Windows.
The Eclipse plugin should then generate a new certificate when you next try to build a debug package. You may need to clean and then build to generate the certificate.

Sometimes, it works for this solution, sometimes it doesn't. 

 Project-> Clean the project.->Close Eclipse-> Re-open Eclipse.

 Start the Emulator. Remove the Application from the emulator.

Sources: Stackoverflow.com