I have recently published our app for both the iphone and android phones. I have a number of buttons linked to open pdfs from the database and everything works great on the iphone. However, the Android looks like it has done the operation of opening them up but all you see is a white screen. This is the javascript I am using to access the pdf.
codewindow.open('https://api.appery.io/rest/1/db/files/527be05fe4b0157abfe953f4/72dfba43-c860-46b6-b86b-1d2f64b38531.MI-15_Family_of_Standard_Gain_Dipoles.pdf', '_blank','EnableViewPortScale=yes');/code