I want to write a 'service' app that will be connected to a server, the server will send messages to the app and the phone will popup a notification to the screen instantly upon receiving the message from the server even if the phone is locked. (like Whatsapp/Telegram etc..)
Push Notifications are not instant enough.
I was thinking about using WebSocket for that, but not sure it is the best approach. What is the best approach?
Sample code will be appriciated!
Thanks.