I have created iPhone app where I am displaying PDF and playing audio and video files using fastpdfkit.
Now I want to make same app for Android also. Is there any kit for android where I can have same functionalities?
iText is a dedicated java library to create and manipulate PDF documents. It has an Android version named iTextG. iText tutorials are more available than for iTextG. So I suggest you to use iText tutorials.
iTextG is only for pdf manipulation. You can rely on Android multimedia API for audio and video support.