#PDF Viewer demo - from web site URL
- check if PDF has been downloaded from web site and stored in file system
- if not, then retrieve from web site and store in file system and open
- use docviewer on ios and exernal app (via intent) on android
- if so, then open pdf
- use docviewer on ios and exernal app (via intent) on android
Note that Android, the file is stored in the externalStorageDirectory (SDCard) so deleting the application will not remove the pdf form the SDCard. Use a File Manager app (pn Android) to delete the file