This project is inspired by the Live Video Reactions on Facebook. I have used RxJava2 for handling the stream of reactions (like, love, haha, wow, sad, angry). I have put one extra condition that the time duration between two reactions should be atleast 300 ms.. This is achieved very easily by RxJava by using Flowable. Also, I have used Canvas to draw bitmaps over it and perform animations on top of it.