title: Wifi Direct print in application
body: <p>I read a lot of questions about WIFI direct print, but no really accepting answer. And maybe there are recents evolution ...</p>
  
  <p>Thats why I ask the mine :
  In my application, I need to print a pdf file I created. How to direct-wifi-print it, without being connected to internet or any other network (no cloud printing), except the printer's one ?</p>
  
  <p>I would like to do it with a button that immediatly launches the printing on the (appaired) printer.</p>
  
  <p>I didn't buy the printer, so if someone has a solution with a specific printer, I'd appreciate to know how, and which one I had to buy.
  Tks for your advices</p>