FloatingHeads (Facebook Messenger like chat heads)
This project is based on the tutorial from Android Hive (https://www.androidhive.info/2016/11/android-floating-widget-like-facebook-chat-head/). So all the thanks for KEVAL PATEL who publish this tutorial on JULY 12, 2017. His article can also be read on Medium: https://medium.com/@kevalpatel2106/create-chat-heads-like-facebook-messenger-32f7f1a62064.
I have made a follow up converting to kotlin with the intent to make it work first. Improvements comes after for this case. The code was tested on a Samsung S10 device with Android 10.