Android下通过wifi调用打印机打印

// Code in Activity  try {    Socket sock = new Socket("192.168.199.245", 9100); // ip and port of printer    PrintWriter oStream = new PrintWriter(sock.getOutputStream());    oStream.println("\t\t Text to The Printer");    oStream.println("\n\n\n");    oStream.close();    sock.close();  } catch (UnknownHostException e) {    e.printStackTrace();  } catch (IOException e) {    e.printStackTrace();  }