在应用程序中处理离线和在线用户的最佳方法是什么？

Question

I have an app and I want to handle online and offline users, which when user destroy the app from the background I have to send to the server that this user is offline now, otherwise send online

Answer 1

make a server request in onDestroy method onDestroy: The final call you receive before your activity is destroyed.

public void onDestroy() {
super.onDestroy();
}