I've been studying how to print from my zebra gc420t on android studio, and it works well when it comes to only strings with text, but now i'm trying to add a image to it and i can't figure out what i'm doing wrong, the part of the GW command where the binary data should be is all taken by symbols, does anyone have any idea what could be the problem with my bytes conversion? 



 

example of what i'm receiving from the convertion: GW512,590,16,125,�����������