I ran across PDFTron SDKs and was wondering if you have tried using it within a AIR ANE? AIR apps for mobile don't really have a good solution for viewing pdfs, especially on Android, so I was wondering if your solution could do this.
For viewing PDFs, there are couple of options:
With option a) you could use native SDK either directly as part of native Android/iOS/WinRT/WP8/... app our you can try to access the native library via Native Extensions for Air (ANE). The last time we tried Native Extensions for Air we found that interop suffered from some limitations (e.g. related to exception handling etc.), but these may have beed addressed in recent updates from Adobe.
Please keep in mind that if you use HTML5 WebViewer you would not necessarily need to use Flash at all (althoug you could if you really want to stick with Flash/AIR). Instead you can just write the app in JS+HTML. You can either write a browser based app or you can create minimal native (e.g. android, ios, ...) app with embedded browser control (i.e. WebView), which loads WebViewer. For a concrete example, please take a look at Android sample project ( see ‘WebViewer\samples\android’) that comes along the latest WebViewer Beta package (https://groups.google.com/d/msg/pdfnet-webviewer/4XkCgdLi4Z8/4Eh5EJEAfsMJ
Note: Both HTML5 and Flash viewers come with local part retrievers that will allow you read local files (WebViewer\samples\android\src\com\pdftron\webviewer\LocalFileContentProvider.java) in online or offline mode.