“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.

You may some times works for this, don't forget to try this,

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

 Start the Emulator. Remove the Application from the emulator.

Sources: Stackoverflow.com