问题
I am currently developing chat application using openfire and smack library in android.I have installed openfire on my windows machine and also xampp server on it.I am able to do the android device to device chat using openfire,smack and xampp.I want to send notification when user is unavailable to chat.I found that that there is plugin available in openfire with name callbackonoffline.but i do not know how should i use it from my client android device to receive notification.I am doing using localhost.
回答1:
Check this link Openfire offline notification through PHP
来源：https://stackoverflow.com/questions/40376523/send-notification-using-openfire-xmpp-server-android-using-callbackonoffline