Starting from version 4.0, we've re-designed PDFLayout classes using OpenGL (page caching uses GPU cache) 

OpenGL classes support a basic rendering using reflow and curl modes (without annoations and zoom support)

Along with the code re-design, the interface PDFLayoutView.PDFLayoutListener has been substituted with com.radaee.view.ILayoutView.PDFLayoutListener.

Also PDFLayoutView.refreshCurrentPage has been renamed to PDFUpdateCurrPage

We have maintained almost the same methods, so we recommend that in your app you implement ILayoutView.PDFLayoutListener.