An android app which you can send messages who registered in this application

Some pictures from an app

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apk link: https://github.com/mirzemehdi/onlinecontacts/raw/master/apk/onlinecontacts.apk

Firebase Database - For saving users ,messages,images in real-time database
Picasso - for getting image from url
Process Button - When Register for user-friendly
RecylerView - for showing users,messages in the list
CardView - in list row

This app loads datas dynamic(part by part).While other datas are loading there is progress button like in Instagram.

----Developed by Mirzamehdi Karimov----