Is there any solution to upgrade an app with new keystore

We want to update an existing Application but unfortunately we have a problem. Our keystore to sign up the app is not the same as the one we used in the previous version of the application. Therefore we can´t upgrade our existing app in the market. Is there any way to get the old key (certificate) from our previous version which is currently in the market place?

Is there any solution to upgrade our existing version with the new one we would like开发者_Go百科 to publish in the store? What happens to the users who have installed the current version if we delete this version in the marketplace and upload a the new version (with the same name)? Do they get an update notification or do they have to install the new app?

thanks in advance

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You must use the previously used certificate to sign your app if you want to upload an updated version to the market. If you use a new certificate to sign your app and try to upload it as a new version, it will fail. If you upload it as a new application, the existing users will not be informed of the update.

Edit - if you have your Keystore but forgot the alias, you can try to recover it.

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http://www.google.com/support/androidmarket/bin/request.py?contact_type=contact_policy&policy=apps

I would email the Android Market guys, they have provided fixes for people before, they have moved whole apps over to a new account for people, so they may be able to help you with your issue. If not the post above is the best explanation, either new app and they will have to download or try to find the old keystore.. sorry man.. hopefully they can help

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As far as what I know Its not possible to recover the same keystore anyhow , so you cant upgrade the existing Application. The only solution is you have to launch a complete new app.