Flutter app for Android & iOS
C:\Program Files\Java\jdk1.8.0_251\bin
keytool -genkey -v -keystore c:\Users<USER>\upload-keystore.jks -storetype JKS -keyalg RSA -keysize 2048 -validity 10000 -alias upload
Create a file named [project]/android/key.properties
that contains a reference to your keystore:
storePassword=<password from previous step>
keyPassword=<password from previous step>
keyAlias=upload
storeFile=<location of the key store file, such as /Users/<user name>/upload-keystore.jks>
Follow tutorial on https://flutter.dev/docs/deployment/android