Android :: Scrollview And GestureDetector?

I'm making sort of a book app. I have the text displayed as a textview in a scrollview:

CODE:.....

I then have

CODE:...............

And implemented the required following to catch a left fling or right fling. And

CODE:.......

This works fine if the text inside the textview is small (ie. there is no scroll bar as it all fits within the view). But as soon as the text requires scrolling, the gesture is no longer picked up by the detector. onFling is never called.

I have read that it is because scrollview handles its own gestueres? If so what is the easiest way to maintain the ability to scroll up and down the text, and also be able to detect flinging left or right and invoking nextChapter() and previousChapter() respectively?