According to the latest requirements of Google Play, all new apps on Google in August 2021 need to use the form of App Bundle.
In this form, Google Play App Signing must be used. The following describes how to use the signature file in the background of Google to generate our signature file.
Log in to the Google store to enter the application, version management, application signature, and download the application signature certificate deployment_cert.der
keytool -import -file deployment_cert.der -keystore deployment_cert.jks This will generate Google's signature file deployment_cert.jks