Simplest way to generate keystores and sign apk files, don't want to rembember longer commands. To work this module perfectly Java JDK should be installed and java path variable should be present.
You can use this library to generate a keystore and sign apk files simply.
To generate keystore on working directory run
kg key generate
To sign an apk file, run
kg key sign --src apkfile --keystore keystorefile
To get usage guid, run
kg --help
Library uses below command to generate the keystore file,
keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000
and below command to sign apk
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore my-release-key.keystore HelloWorld-release-unsigned.apk alias_name
GNU GPL (see)