When I removed the android platform from my ionic project and then I tried to re-install using this command "ionic cordova platform add android". but I got this error, Code ENOLOCAL. Could not install from "android" as it does not contain a package.json file. Solution:
Simply, I removed the android folder from the root directory, i.e not from the platform directory and then I re-install with the same command.
Great it works perfectly.