java - how to send data to com port in android using uart wired connection? -


i can send data ttys1 using terminel of android. how can using code in application? had tried libraries not working me. can suggest solution? code using rxtxcomm.jar, showing error *'couldn't find "librxtxserial.so"'. * can provide solution? in advance..

 public void open() {     enumeration port_list = commportidentifier.getportidentifiers();      while (port_list.hasmoreelements()) {         // list of ports         commportidentifier port_id = (commportidentifier) port_list.nextelement();         if (port_id.getname().equals("/dev/ttys1")) {              // attempt open             try {                 serialport port = (serialport) port_id.open("portlistopen", 20);                 system.out.println("opened successfully");                 try {                     int baudrate = 115200; //                     port.setserialportparams(baudrate, serialport.databits_7, serialport.stopbits_1, serialport.parity_even);                     port.setdtr(true);                    /*                      port.setflowcontrolmode(                             serialport.flowcontrol_none);                     *                     */                     system.out.println("properties set");                 } catch (unsupportedcommoperationexception e) {                     system.out.println(e);                 }                 try {                     //input = new serialreader(in);                     port.addeventlistener((serialporteventlistener) this);                     system.out.println("listeners attached" + this);                 } catch (toomanylistenersexception e) {                     system.out.println("too many listeners");                 }                 port.notifyondataavailable(true);                 //port.notifyonoutputempty(true);                 //sendmessage(port,"@pl");                 //port.close ();                 try {                     inputstream = port.getinputstream();                     system.out.println("inputstream" + inputstream.available());                     outputstream = (outputstream) port.getoutputstream();                  } catch (ioexception e) {                     system.out.println(e);                 }                  //set created variables global variables                 port = port;                 inputstream = inputstream;                 outputstream = outputstream;             } catch (portinuseexception pe) {                 system.out.println("open failed");                 string owner_name = port_id.getcurrentowner();                 if (owner_name == null) {                     system.out.println("port owned unidentified app");                 } else // owner name not returned correctly unless                 // java program.                 {                     system.out.println("  " + owner_name);                 }             }         }     } }  public static void sendmessage(string port, string msg) {     if (port != null) {         try {            outputstream.write(msg.getbytes());             outputstream.flush();             try {                 thread.sleep(2000);  // sure data xferred before closing                 system.out.println("read called");                 //simpleread read = new simpleread();                 //int read = global_variables.inputstream.read();                 //system.out.println("read call ended"+read);             } catch (exception e) {             }         } catch (ioexception ex) {           ex.printstacktrace();         }     } } public void serialevent(serialportevent event) {     system.out.println(event.geteventtype());     switch (event.geteventtype()) {         case serialportevent.data_available:             system.out.println("inside event handler data available");             byte[] readbuffer = new byte[20];             try {                 while (inputstream.available() > 0) {                     int numbytes = inputstream.read(readbuffer);                 }                 system.out.print(new string(readbuffer));                 system.exit(1);             } catch (ioexception e) {                 system.out.println(e);             }              break;     } }


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