问题
If I use Google Play App Signing and I lose the upload key, what happens?
回答1:
I'm glad you asked, there is no need to worry if you lose the upload key. You can generate a new one. From Google's documentation:
When you use Google Play App Signing, if you lose your upload key, or if it is compromised, you can contact Google to revoke your old upload key and generate a new one. Because your app signing key is secured by Google, you can continue to upload new versions of your app as updates to the original app, even if you change upload keys.
来源：https://stackoverflow.com/questions/49470722/what-happens-if-the-upload-key-is-lost-when-using-google-play-app-signing