Possible to transfer BTC via QR code?
Just add amount parameter to QR data:

bitcoin:1ArmoryXcfq7TnCSuZa9fQjRYwJ4bkRKfv?amount=0.005


use google chart to generate QR 

https://chart.googleapis.com/chart?chs=250x250&amp;cht=qr&amp;chl=bitcoin:1ArmoryXcfq7TnCSuZa9fQjRYwJ4bkRKfv?&amp;amount=0.005




  if you are asking about auto sending bitcoin through QR so it's not possible.