I have a problem. I can not see maps in my App when I publish it. I'm starting on this and when I do it with the Key API generated with Debug without problem, but when I use the SHA1 of my key with which I sign the App they do not look. I have read the related topics and I try to do the indicated but in success. I would very much appreciate any help.
Navigating and researching I found the following, which looks very similar to your problem, since you mention that you signed and used the SHA-1 that you yourself generated for the API-KEY:
Information:
According to the new update of Play Console when you signed your APK with SHA-1 and loaded the APK, you only signed it, but according to the new update it is also signed by Google Play for greater security. Look here part of the Google Play section:
With Google Play App Signing: sign the application with your upload key. Next, Google verifies and removes the upload key signature. Finally, Google re-signs the application with the original signature key that you have provided and sends the application to the user.
Now, the answer to the question is "After successfully uploading the APK, you can see that in the section, there are two SHA-1, the first SHA-1 is created by Google and the second SHA-1 is yours.
So just copy the Google SHA-1 and paste it into your console where you generate the Google Map API key.
Source: StackOverflow in English