Android

# xx
keytool -genkey -v -keystore <keystore>.keystore -alias <alias> -keyalg RSA -keysize 2048 -validity 20000
 
# Convert to pkcs12
keytool -importkeystore -srckeystore <keystore>.keystore -destkeystore <keystore>-pkcs12.keystore -deststoretype pkcs12
 
# Sign jar
cp <path to app-release-unsigned.apk> <path to app-release-pre-signed.apk>
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore <keystore>.keystore <path to app-release-pre-signed.apk> <alias>
 
# Zip align // you can apt install or // use from ~/Android/Sdk/build-tools/x.x.x/zipalign // x.x.x = version
~/Android/Sdk/build-tools/x.x.x/zipalign -v 4 <path to app-release-pre-signed.apk> <path to app-release.apk>