The apk must be signed with the same certificates as the previous one

Question

I am trying to upgrade my previous version app into the Android market,but it shows an error as "The apk must be signed with the same certificates as the previous one". I am also having previous version apk file.but dont know how to solve this certificate issue..Can someone pls guide me the steps on how to upgrade this new version app?

Answer 1

You should definitely read this:

http://developer.android.com/guide/publishing/app-signing.html

When you published the app the first time you must have used a certificate - it's mandatory. To upgrade the app you must use the same certificate to sign the upgraded app.

If you lost the certificate, there is no way to perform upgrade. You will need to remove app from market and add a new one. This will not upgrade the app for existing users.

Answer 2

要升级，任何应用程序证书必须与以前相同，或者可以通过安装整个应用程序然后再次重新安装来完成

Answer 3

只需使用与上一个应用程序相同的键盘工具即可。