WhatsApp Stickers (Working example)

I can pay $50 via paypal for working example, until friday(november 16th).
Just contact me via PM, and send a working example

Here is it
https://github.com/WhatsApp/stickers/tree/master/Android

this use fileprovider and intent

Example app
https://play.google.com/store/apps/details?id=com.easycodes.stickers

thx