Add Media Playback Notification into Webview Android App

I have a fully functional apps with a webview inside. Main purpose of this app is to play audio from html5 player. The only problem is whenever the App is closed and other App is opened and consuming more phone memory, the App get killed and audio stopped because of Android App life cycle. To avoid this problem, i need to display play back media control in notification area like chrome browser did. So the App run on foreground and the audio not stopped. I found a snippet code on [login to view URL], but i need help to integrate it on my apps. Here is the link [login to view URL] If you interesting, you can bid for this simple and easy task. Thank you.