How can I disable App Signing from Google Play Console for all the apps already uploaded on Play store and for new apps?
You can't disable App Signing after being activated as you can read in the image below:
Took from official documentation.
If you are stucked with it, you can follow the guide i posted here
Quoting the @MatPag you can't disable the app signing after activating it from Google Play Console. Here is the quick way to resolve this issue.
- "CREATE APPLICATION" having the same name which you want to upload before.
- Click create.
- After creation of the app now click on the "App releases"
- Click on the "MANAGE PRODUCTION"
- Click on the "CREATE RELEASE"
- Here you see "Google Play App Signing" dialog.
- Just click on the "OPT-OUT" button.
- It will ask you to confirm it. Just click on the "confirm" button.
You are ready to Drop your APK file with your signing key. Just give it a try.
If you haven't published yet, you can delete the app and then recreate it, and opt out of the google play app signing.
If Anyone is looking here because FIREBASE requires the new SHA1 fingerprint you can find it in the APP SIGNING screen and add it to your app for notification or authentication ....
We don't even have to change the JSON file that you have to include in your app.
来源：https://stackoverflow.com/questions/44180930/how-to-disable-app-signing-from-google-play-console