with - how to use javascript in android application example

Add JS and CSS support to Android Studio project (2)

I just installed the new Android Studio and I'm looking for a way to be able to get support for CSS and JS (autocomplete, highlighting for incorrect usages) as i would in PHPStorm and also WebStorm, both intelliJ products.

I have googled and even added it to 'File Types', but stil they just display as plain text files.

JS/CSS are not part of Android Studio. You'd have to install IntelliJ Ultimate edition if you need those.

In general, you won't get a feature like that which is only available in a paid version in a free tool like Android Studio or IntelliJ Community Edition.