I want my app can pop notification when it runs on background.
The function like WeChat.
My app is a network client, but not have user account system.
If my app not run on foreground or background, the server message not need to pop notification.
So I don't need the cloud system to do this.
I only want two things:
1. My app can run network receive loop on android background.
2. My app can tell the android system pop notification with my text.