Keep your keystore and private key in a safe and secure place, and
ensure that you have secure backups of them. If you publish an app to
Google Play and then lose the key with which you signed your app, you
will not be able to publish any updates to your app, since you must
always sign all versions of your app with the same key.
- There's no way to recover your key . Lost my keystore for uploaded app on android market .
So finally, Its not possible. Please Create new keystore with the application with different package name and version and publish as a new application.
Courtesy goes to Signing Your Applications .
