How to connect to bluetoothbee device using j2me?
- by user1500412
I developed a simple bluetooth connection application in j2me.
I try it on emulator, both server and client can found each other, but when I deploy the application to blackberry mobile phone and connect to a bluetoothbee device it says service search no records.
What could it be possibly wrong? is it j2me can not find a service in bluetoothbee?
The j2me itself succeed to found the bluetoothbee device, but why it can not find the service?
My code is below. What I don't understand is the UUID? how to set UUID for unknown source? since I didn't know the UUID for the bluetoothbee device.
class SearchingDevice extends Canvas implements Runnable,CommandListener,DiscoveryListener{
//......
public SearchingDevice(MenuUtama midlet, Display display){
this.display = display;
this.midlet = midlet;
t = new Thread(this);
t.start();
timer = new Timer();
task = new TestTimerTask();
/*--------------------Device List------------------------------*/
select = new Command("Pilih",Command.OK,0);
back = new Command("Kembali",Command.BACK,0);
btDevice = new List("Pilih Device",Choice.IMPLICIT);
btDevice.addCommand(select);
btDevice.addCommand(back);
btDevice.setCommandListener(this);
/*------------------Input Form---------------------------------*/
formInput = new Form("Form Input");
nama = new TextField("Nama","",50,TextField.ANY);
umur = new TextField("Umur","",50,TextField.ANY);
measure = new Command("Ukur",Command.SCREEN,0);
gender = new ChoiceGroup("Jenis Kelamin",Choice.EXCLUSIVE);
formInput.addCommand(back);
formInput.addCommand(measure);
gender.append("Pria", null);
gender.append("Wanita", null);
formInput.append(nama);
formInput.append(umur);
formInput.append(gender);
formInput.setCommandListener(this);
/*---------------------------------------------------------------*/
findDevice();
}
/*----------------Gambar screen searching device---------------------------------*/
protected void paint(Graphics g) {
g.setColor(0,0,0);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(255,255,255);
g.drawString("Mencari Device", 20, 20, Graphics.TOP|Graphics.LEFT);
if(this.counter == 1){
g.setColor(255,115,200);
g.fillRect(20, 100, 20, 20);
}
if(this.counter == 2){
g.setColor(255,115,200);
g.fillRect(20, 100, 20, 20);
g.setColor(100,255,255);
g.fillRect(60, 80, 20, 40);
}
if(this.counter == 3){
g.setColor(255,115,200);
g.fillRect(20, 100, 20, 20);
g.setColor(100,255,255);
g.fillRect(60, 80, 20, 40);
g.setColor(255,115,200);
g.fillRect(100, 60, 20, 60);
}
if(this.counter == 4){
g.setColor(255,115,200);
g.fillRect(20, 100, 20, 20);
g.setColor(100,255,255);
g.fillRect(60, 80, 20, 40);
g.setColor(255,115,200);
g.fillRect(100, 60, 20, 60);
g.setColor(100,255,255);
g.fillRect(140, 40, 20, 80);
//display.callSerially(this);
}
}
/*--------- Running Searching Screen ----------------------------------------------*/
public void run() {
while(run){
this.counter++;
if(counter > 4){
this.counter = 1;
}
try {
Thread.sleep(1000);
} catch (InterruptedException ex) {
System.out.println("interrupt"+ex.getMessage());
}
repaint();
}
}
/*-----------------------------cari device bluetooth yang -------------------*/
public void findDevice(){
try {
devices = new java.util.Vector();
local = LocalDevice.getLocalDevice();
agent = local.getDiscoveryAgent();
local.setDiscoverable(DiscoveryAgent.GIAC);
agent.startInquiry(DiscoveryAgent.GIAC, this);
} catch (BluetoothStateException ex) {
System.out.println("find device"+ex.getMessage());
}
}
/*-----------------------------jika device ditemukan--------------------------*/
public void deviceDiscovered(RemoteDevice rd, DeviceClass dc) {
devices.addElement(rd);
}
/*--------------Selesai tes koneksi ke bluetooth server--------------------------*/
public void inquiryCompleted(int param) {
switch(param){
case DiscoveryListener.INQUIRY_COMPLETED: //inquiry completed normally
if(devices.size()>0){ //at least one device has been found
services = new java.util.Vector();
this.findServices((RemoteDevice)devices.elementAt(0));
this.run = false;
do_alert("Inquiry completed",4000);
}else{
do_alert("No device found in range",4000);
}
break;
case DiscoveryListener.INQUIRY_ERROR:
do_alert("Inquiry error",4000);
break;
case DiscoveryListener.INQUIRY_TERMINATED:
do_alert("Inquiry canceled",4000);
break;
}
}
/*-------------------------------Cari service bluetooth server----------------------------*/
public void findServices(RemoteDevice device){
try {
// int[] attributes = {0x100,0x101,0x102};
UUID[] uuids = new UUID[1];
//alamat server
uuids[0] = new UUID("F0E0D0C0B0A000908070605040302010",false);
//uuids[0] = new UUID("8841",true);
//menyiapkan device lokal
local = LocalDevice.getLocalDevice();
agent = local.getDiscoveryAgent();
//mencari service dari server
agent.searchServices(null, uuids, device, this);
//server = (StreamConnectionNotifies)Connector.open(url.toString());
} catch (BluetoothStateException ex) {
// ex.printStackTrace();
System.out.println("Errorx"+ex.getMessage());
}
}
/*---------------------------Pencarian service selesai------------------------*/
public void serviceSearchCompleted(int transID, int respCode) {
switch(respCode){
case DiscoveryListener.SERVICE_SEARCH_COMPLETED:
if(currentDevice == devices.size() - 1){
if(services.size() > 0){
this.run = false;
display.setCurrent(btDevice);
do_alert("Service found",4000);
}else{
do_alert("The service was not found",4000);
}
}else{
currentDevice++;
this.findServices((RemoteDevice)devices.elementAt(currentDevice));
}
break;
case DiscoveryListener.SERVICE_SEARCH_DEVICE_NOT_REACHABLE:
do_alert("Device not Reachable",4000);
break;
case DiscoveryListener.SERVICE_SEARCH_ERROR:
do_alert("Service search error",4000);
break;
case DiscoveryListener.SERVICE_SEARCH_NO_RECORDS:
do_alert("No records return",4000);
break;
case DiscoveryListener.SERVICE_SEARCH_TERMINATED:
do_alert("Inquiry canceled",4000);
break;
} }
public void servicesDiscovered(int i, ServiceRecord[] srs) {
for(int x=0; x<srs.length;x++)
services.addElement(srs[x]);
try {
btDevice.append(((RemoteDevice)devices.elementAt(currentDevice)).getFriendlyName(false),null);
} catch (IOException ex) {
System.out.println("service discover"+ex.getMessage());
}
}
public void do_alert(String msg, int time_out){
if(display.getCurrent() instanceof Alert){
((Alert)display.getCurrent()).setString(msg);
((Alert)display.getCurrent()).setTimeout(time_out);
}else{
Alert alert = new Alert("Bluetooth");
alert.setString(msg);
alert.setTimeout(time_out);
display.setCurrent(alert);
}
}
private String getData(){
System.out.println("getData");
String cmd="";
try {
ServiceRecord service = (ServiceRecord)services.elementAt(btDevice.getSelectedIndex());
String url = service.getConnectionURL(ServiceRecord.NOAUTHENTICATE_NOENCRYPT, false);
conn = (StreamConnection)Connector.open(url);
DataInputStream in = conn.openDataInputStream();
int i=0;
timer.schedule(task, 15000);
char c1;
while(time){
//while(((c1 = in.readChar())>0) && (c1 != '\n')){
//while(((c1 = in.readChar())>0) ){
c1 = in.readChar();
cmd = cmd + c1;
//System.out.println(c1);
// }
}
System.out.print("cmd"+cmd);
if(time == false){
in.close();
conn.close();
}
} catch (IOException ex) {
System.err.println("Cant read data"+ex);
}
return cmd;
}
//timer task fungsinya ketika telah mencapai waktu yg dijadwalkan putus koneksi
private static class TestTimerTask extends TimerTask{
public TestTimerTask() {
}
public void run() {
time = false;
}
}
}
