I just created an app to open pdf product catalogs using mit app inventor. As the size of pdf is quite large so I thought to do this process in 3 steps
First when the button clicked the app to search for the pdf into sd card or memory card if the file exists then it opens that pdf using activity started otherwise activity starter start to download the catalog to a specific location into sd card or mobile memory.
Secondly - If download has already been done once then there is no need to download catalog again
Third - If app updated then pdf remain secured into sd and new version can also access it again
It’s a very long way to go which can irritate users, is there any simple way of doing this process like we user first initiate app all download start in background no matter he closes the app.
I just want that user shouldn’t wait to download for the file.