I'm try the file PDF ... but in whatsapp get the error "The file selected not a document"... i think the problem are in.... "image/*"... is possible select PDF file???
i think no. MIME type is IMAGE TEXT AUDIO ec.. no PDF
But it is very strange to me it works.
Try this (with JavaObject Library)
B4X:
Dim i As Intent
i.Initialize(i.ACTION_SEND, "file://" & File.DirRootExternal & "/1.PDF")
i.SetType("image/png")
Dim jo As JavaObject = i
jo.RunMethod("setPackage", Array As Object("com.whatsapp"))
StartActivity(i)