Sign app apk

I am using flutter to create an apk with my server settings. App is not created because it is not signed. Please tell me how to fix it.

How did you sign it?

Try to temporally use debug sign:

sed -i "s/signingConfigs.release/signingConfigs.debug/g" ./flutter/android/app/build.gradle

Then use this command to build your apk:

flutter build apk --release --target-platform android-arm64 --split-per-abi