android wifi printing project

currently i have an Android app written in java that can print to a mobile printer using bluetooth I would like to support printing via wifi to network enabled printers, so I would like to have someone develop a prototype that I can use as a model and then I will easily be able to add this support to my existing app. Primarily we are printing to a thermal label printer, like Zebra QLN220 1) we would need one function that will detect the printer server of the network 2) we need to be able to select a printer, from the available printers 3) need a test action to print a test print I can supply a Zebra QLN220 printer to the developer so that they can develop and test a prototype