Menu bar -> Build -> Generate Signed APK
Enter Key store path they have to be used for the storage location of the signature key file, and enter the username and password to read and write key file (if not the key file click on the figure of "Create New" to create it )
APK Destination Folder -> APK file generated directory
Build Type -> generate a release version or debug version
Signature Version -> sign of what parts
Generation after generation is completed in the specified directory that is there will be a release folder under which you can find apk generated (app-release.apk I previously generated versions)
