Android - How to make activity or layout over other apps? [closed]

Question

I want to show message to user. But I want to do that like MusiXMatch. I don't know what is component's name.

MusixMatch shows lyrics over the other apps till user close the app or click hide button. I can explain what I want with 2 Images.

I hope that I can explain what I want.

Answer 1

use floating view https://github.com/marshallino16/FloatingView

or standout window https://github.com/pingpongboss/StandOut