I can only to find the webrtc on web page using pub nub.
Is there any example or libraries implements using pubnub?
This is outside of PubNub's domain. See StackOverflow: http://stackoverflow.com/questions/16517935/webrtc-on-a-standalone-mobile-app
This was just one result when I googled webrtc android native library
tokbox.com provides both iOS / Android libraries. I think PubNub can do same.
Agreed but tokbox is focused on a vertical solution that addresses this need. PubNub is a horizontal platform to build things like tokbox.
As for the future of our direct WebRTC, it will evolve as demand increases.
Just wanted to let you know, that I am very interested into such an SDK, too.
Read this SO post for latest details on PubNub with respect to WebRTC, AndroidRTC, Video Chat and signaling. http://stackoverflow.com/questions/28740230/how-to-use-webrtc-pubnub-api-for-video-chat-client-in-native-android-app