For windows xp go to
C:\Documents and Settings\%userprofile%.android and delete debug.keystore file , restart the eclipse and now your project get build without error.
C:\Documents and Settings\raja.ap.android\
In Windows 7 it is at the path
goto this path and remove debug.keystore
clean and build your project.
The Android SDK generates a "debug" signing certificate for you in a keystore called debug.keystore.The Eclipse plug-in uses this certificate to sign each application build that is generated.
Unfortunately a debug certificate is only valid for 365 days. To generate a new one, you must delete the existing debug.keystore file. Its location is platform dependent - you can find it in Preferences -> Android -> Build -> *Default debug keystore.
If you are using Windows, follow the steps below.
DOS: del c:\user\dad.android\debug.keystore
Eclipse: In Project, Clean the project. Close Eclipse. Re-open Eclipse.
Eclipse: Start the Emulator. Remove the Application from the emulator.
If you are using Linux or Mac, follow the steps below.
Manually delete debug.keystore from the .android folder.
You can find the .android folder like this: home/username/.android
Note: the default .android file will be hidden.
So click on the places menu. Under select home folder. Under click on view, under click show hidden files and then the .android folder will be visible.
Delete debug.keystore from the .android folder.
Then clean your project. Now Android will generate a new .android folder file.
I had this problem couple of weeks ago. I first tried the troubleshooting on the Android developer site, but without luck. After that I reinstalled the Android SDK, which solved my problem.
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.
Upon installation, the Android SDK generates a "debug" signing certificate for you in a keystore called debug.keystore. The Eclipse plug-in uses this certificate to sign each application build that is generated.
Unfortunately a debug certificate is only valid for 365 days. To generate a new one you must delete the existing debug.keystore file. Its location is platform dependent - you can find it in Preferences - Android - Build - Default debug keystore.
On Vista, this worked:
DOS: del c:\user\dad\.android\debug.keystore
ECLIPSE: In Project, Clean the project. Close Eclipse. Re-open Eclipse.
ECLIPSE: Start the Emulator. Remove the Application from the emulator.
You are good to go.
I was pretty worried when I say that error, but I fixed it from reading here and playing around for 10 minutes.
It's a pain to have to delete all your development .apk files, because the new certificate doesn't match so you can't upgrade them in all your AVDs. You have to get another development MAP-API key as well. There's another solution.
You can create your own debug certificate in debug.keystore with whatever expiration you want. Do this in the .android folder under your HOME directory:
keytool -genkey -v -keystore debug.keystore -alias androiddebugkey -storepass android -keypass android -keyalg RSA -validity 14000
keytool.exe can be found in the JDK bin folder (e.g. C:\Program Files\Java\jdk1.6.0_31\bin\ on Windows).
ADT sets the first and last name on the certificate as "Android Debug", the organizational unit as "Android" and the two-letter country code as "US". You can leave the organization, city, and state values as "Unknown". This example uses a validity of 14000 days. You can use whatever value you like.
C:\Documents and Settings\[user].android
go to C:\Users[username].android and delete debug.keystore file.
Restart Eclipse and automatically you will have another keystore
Delete your keystore located in ~/.android/debug.keystore then restart Eclipse.
On a Mac, open the console (current user's directory should open), cd ".android" ("ls" to validate debug.keystore is there). Finally "rm debug.keystore" to remove the file.
If a certificate expires in the middle of project debugging, you must do a manual uninstall:
adb uninstall <package_name> in a shell.
On Ubuntu, this worked:
I went to home/username/.android and I renamed keystore.debug to keystoreold.debug. I then closed Eclipse, started Eclipse, and SDK created new certificate keystore.debug in that folder.
You then have to uninstall/reinstall apps you installed via USB Debugging or an unsigned APK ("unsigned" APK = signed with debug certificate).
H-m-m-m. Interesting how so many people have had slightly different experiences with this. I remember the days when this was considered a sign that the software was not ready for release, and the team would actually fix it BEFORE users started seeing these problems:(
My own experience was just a little different. I had already tried Project>Clean, but still got the same build failure. Then I deleted the debug.keystore (under .android) just as the first answer said. Still got the same problem. Then I did a clean again, and wonder of wonders, it worked!
Now don't get me wrong, I am glad that I got it working thanks to the hints in this thread. But clearly clean isn't working right, and how did it find an expired key after I deleted the keystore??? Clearly something is wrong with Eclipse or the ADT -- not so sure which.
In Windows debug.keystore file is localtes at C:\Users\%Username%\.android folder. This file is created when you install your android SDK and is valid only for a year. After this perod you will start getting this error Error getting final archive: Debug certificate expired on xx/xx/xxxx.
To remove this error simply delete the file and run the program again. In my Eclipse I have enabled Project->Build Automatically so it directly worked but in case you have disabled it you will need to clean the project Project->Clean.. select your project and press ok. Then you will need to build it manually. 3rd click on your project and select Build project.(Note - You will only see this option if you have diabled Build Automatically feature in your Projects Menu)