Created with Copy to Gist

gist.java

public synchronized void printText(String text) throws PrintingException {
    PrintingListener printingListener = new PrintingListener() {
        @Override
        public void onSuccess(SuccessResult successResult) {
        }

        @Override
        public void onFailure(FailureResult failureResult) {  
        }

        @Override
        public void onTimeout(TimeoutResult timeoutResult) {
        }
    };

    printerApi.startPrinting(text, printingListener);

}