Notification Listener with Sms

can anyone guide me to create an app with notification listener and read the notification message then send the message to other person via sms.

You can't send a sns in the background, your app must be up and running to do this.

What have you tried up ti now? As a start you could experiment with the following example

Do you like to listen only to incoming sms or are these other notifications?

Taifun