HP Printer Mobile App not on list of Share apps

[jjaws]

Why does the HP Printer App icon not show up in the list of shared app icons when I try to print on my Android phone.  I am not able to direct things to my printer in certain cases like this. I have installed the HP Print Service Plugin, but I do not see this app either.

[jjaws · Accepted solution]

I actually found the solution as I searched elsewhere on the web.  It appears that in the code of every app there has an "intent filter" that determines what other apps share lists it will appear on.  So I found out that the HP Print Service Plugin App shows up in the Share list for the Google Search Engine app, but it does not show up in the Share list of the Duck Duck Go Search Engine app. The fix is for HP to modify their "intent filter" for the Print Service Plugin App, so that it chooses to show up on the Share list of the Duck Duck Go Search Engine App.  That would at least resolve my issue.