How to print text on android bluetooth printer?

I have a bluetooth printer, need help to print text in this printer, is there any way to do this?

the printer has a SDK, BixolonPrinter.jar, with Java2op I extracted this to pascal:

Androidapi.JNI.Interfaces.pas

but when I try to install I get the following error:

Unable to create process: Unable to install .....Project2.apk
Failure
[INSTALL_PARSE_FAILED_MANIFEST_MALFORMED]