android sdk

[Android] Increasing Label Darkness with ZD420: can't find ZebraPrinterLinkOs

Hi,

I'm trying to increase the sharpness & darkness of shipping labels printed with my ZD420 printer via an Android app.

I found sample code for this in the docs here (http://techdocs.zebra.com/link-os/2-14/android/) but when I try it, my code crashes when I call ZebraPrinterFactory.getLinkOsPrinter(connection). The error I get is:

"java.lang.NoClassDefFoundError: Failed resolution of: Lcom/fasterxml/jackson/databind/ObjectMapper;"