Here is an example for who are all going to start learning Kotlin programming language to develop Android application. Kotlin is very lightweight, its run-time library is under 400K minus the ProGuard minification. Also, installation is very simple. All you have to do is browse the plugin repository and get the official Kotlin plugin. You also had to install Kotlin Android Extensions as well, required for Android of course, but not until recently it has been merged with the Kotlin plugin and is now obsolete.