Friday 8 August 2014

how to send multiple image by using java Bluetooth

Send File Multiples Device

Download List Of Jar File:

  • bluecover-2.1.1
  • commons-io-1.3.2
Now create Couple of java class.

1)UI Class:


public class UIDemo extends JDialog implements ActionListener{
private JTextArea jTextArea;
private JList jList;
private DialogListener listener;
private Object[] items;
private JLabel statusLabel;
private static JFileChooser fileChooser = new JFileChooser();

public MyDialog(String title, Object [] items , DialogListener listener ) {
super.setTitle(title);
this.listener = listener;
this.setSize(500,300);
jList = new JList();
if(items==null){
items = new Object[0];
}
jList.setListData(items);
this.items = items;
JScrollPane jScrollPane = new JScrollPane(jList);
jScrollPane.setSize(255,5);
this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(jScrollPane,BorderLayout.WEST);
jTextArea = new JTextArea("Enter message ");
this.getContentPane().add(jTextArea,BorderLayout.CENTER);
JButton ffile= new JButton("Browse");
ffile.addActionListener(this);
this.getContentPane().add(ffile,BorderLayout.EAST);
JButton jButton = new JButton("Send");
jButton.addActionListener(this);
this.getContentPane().add(jButton,BorderLayout.SOUTH);
statusLabel = new JLabel("Started");
fileChooser.setMultiSelectionEnabled(true);

        fileChooser.setCurrentDirectory(new File("path (D:/jnext/.....)"));
        fileChooser.setBounds(50,50,400,400);
        
this.getContentPane().add(statusLabel,BorderLayout.NORTH);
setLocationRelativeTo(null);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
this.show();
}
public void addItem(Object item){
Object [] newitems = new Object[items.length+1];
for (int i = 0; i < items.length; i++) {
newitems[i] = items[i];
}
newitems[newitems.length-1] =item;
items = newitems;
jList.setListData(newitems);
}

public void setStatus(String text){
statusLabel.setText(text);
}

@Override
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals("Send")){
Object [] selectedItems = jList.getSelectedValues();
String message = jTextArea.getText();
Point a=fileChooser.getLocation();
File f=fileChooser.getSelectedFile();
System.out.println(f.getAbsolutePath()+" path :");
System.out.println(" first file");
System.out.println("project data "+a);
listener.sendPressed(selectedItems, f.getAbsolutePath(),this);
}
else{
fileChooser.showDialog(null,
                    "File Chooser");
}
}
public interface DialogListener{
public void sendPressed(Object [] selectedItems, String message,MyDialog dialog);
}
}


2) BTDevice  :

public class BTDevice {
private String name;
private String BTURL;
public BTDevice(String name,String BTURL) {
this.name=name;
this.BTURL=BTURL;
}
@Override
public String toString() {
return name;
}

public String getBTURL() {
return BTURL;
}
}

3)BTMessageSender class :
public class BTMessageSender {

public static boolean  sendMessage(String deviceBTURL, String message, MyDialog dialog){
// we assume that the given device already has the service
try{
System.out.println("Connecting to " + deviceBTURL);
dialog.setStatus("Connecting to " + deviceBTURL);
ClientSession clientSession = 
(ClientSession) Connector.open(deviceBTURL);
 HeaderSet hsConnectReply = clientSession.connect(null);

if (hsConnectReply.getResponseCode() != ResponseCodes.OBEX_HTTP_OK) {
           System.out.println("Failed to connect");
           dialog.setStatus("Failed to connect");
           return false;
     }
 
HeaderSet hsOperation = clientSession.createHeaderSet();
 
    hsOperation.setHeader(HeaderSet.NAME, "jnext.text");
    hsOperation.setHeader(HeaderSet.TYPE, "text");
    
    Operation putOperation = clientSession.put(hsOperation);
    
    // 4. send the data to the device
    File f= new File(message);
    
    InputStream is= new FileInputStream(f);
    byte bk[]=IOUtils.toByteArray(is);
   
   // File imgPath = new File(ImageName);
    BufferedImage bufferedImage = ImageIO.read(f);

    // get DataBufferBytes from Raster
    WritableRaster raster = bufferedImage .getRaster();
    DataBufferByte data   = (DataBufferByte) raster.getDataBuffer();
   
     // text message    
 //   byte arydata[] = message.getBytes("iso-8859-1");
    byte arydata[] =data.getData();
    System.out.println(" total size "+arydata.length);
        OutputStream os = putOperation.openOutputStream();
        os.write(bk);
        os.close();
        putOperation.close();
        clientSession.disconnect(null);
        clientSession.close();
}
catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
}

4)BTServicesSearcher  class :
public class BTServicesSearcher {

static String tempDeviceName;
private static MyDialog dialog;
private static RemoteDeviceDiscoverer remoteDeviceDiscoverer;
    static final UUID OBEX_OBJECT_PUSH = new UUID(0x1105);

    public static final Vector serviceFound = new Vector();

    public static void main(String[] args) throws IOException, InterruptedException {
   
    dialog = new MyDialog("Bluetooth multi-sender",null, new DevicesDialogListener());
    remoteDeviceDiscoverer = new RemoteDeviceDiscoverer();
   
        // First run RemoteDeviceDiscovery and use discovered device
    dialog.setStatus("Searching devices, please wait..");
    remoteDeviceDiscoverer.searchDevices();

        serviceFound.clear();
        
        UUID serviceUUID = OBEX_OBJECT_PUSH;
        if ((args != null) && (args.length > 0)) {
            serviceUUID = new UUID(args[0], false);
        }

        final Object serviceSearchCompletedEvent = new Object();

        DiscoveryListener listener = new DiscoveryListener() {

            public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
           
            }

            public void inquiryCompleted(int discType) {
            }

            public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
           
           
                for (int i = 0; i < servRecord.length; i++) {
               
                    String url = servRecord[i].getConnectionURL(ServiceRecord.AUTHENTICATE_NOENCRYPT, false);
                    if (url == null) {
                        continue;
                    }
                    serviceFound.add(url);
                    DataElement serviceName = servRecord[i].getAttributeValue(0x0100);
                    if (serviceName != null) {
                        System.out.println("service " + serviceName.getValue() + " found " + url);
                    } else {
                        System.out.println("service found " + url);
                    }
                    
                    dialog.addItem(new BTDevice(tempDeviceName,url));
                }
            }

            public void serviceSearchCompleted(int transID, int respCode) {
                System.out.println("service search completed!");
                synchronized(serviceSearchCompletedEvent){
                    serviceSearchCompletedEvent.notifyAll();
                }
            }

        };

        UUID[] searchUuidSet = new UUID[] { serviceUUID };
        int[] attrIDs =  new int[] {
                0x0100 // Service name
        };

        int size = remoteDeviceDiscoverer.getDevicesDiscovered().size();
        dialog.setStatus(size + " devices found. Now checking which is supported.");
        for(Enumeration en = remoteDeviceDiscoverer.getDevicesDiscovered().elements(); en.hasMoreElements(); ) {
            RemoteDevice btDevice = (RemoteDevice)en.nextElement();

            synchronized(serviceSearchCompletedEvent) {
                String friendlyName = "";
                try{
               friendlyName = btDevice.getFriendlyName(false);
               
               tempDeviceName = friendlyName;
                }
                catch (Exception e) {
                    System.out.println("(dont know the name)");
                    tempDeviceName = null;
                }
                System.out.println("search services on " + btDevice.getBluetoothAddress() + " " + friendlyName);
                
                LocalDevice.getLocalDevice().getDiscoveryAgent().searchServices(attrIDs, searchUuidSet, btDevice, listener);
                serviceSearchCompletedEvent.wait();
            }
        }
        
        dialog.setStatus("Search finished. Send a message");
        
    }

}

5)DevicesDialogListener  class :

public class DevicesDialogListener implements DialogListener {

@Override
public void sendPressed(Object[] selectedItems, String message,MyDialog dialog) {
System.out.println(""+message);
for (Object item : selectedItems) {
BTMessageSender.sendMessage(((BTDevice)item).getBTURL(),message, dialog);
}

}
}

6)RemoteDeviceDiscoverer  class :

public class RemoteDeviceDiscoverer {

    private final Vector devicesDiscovered = new Vector();

public void searchDevices() throws IOException, InterruptedException {

        final Object inquiryCompletedEvent = new Object();

        devicesDiscovered.clear();

        DiscoveryListener listener = new DiscoveryListener() {

            public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
                System.out.println("Device " + btDevice.getBluetoothAddress() + " found");
                devicesDiscovered.addElement(btDevice);
                try {
                    System.out.println("     name " + btDevice.getFriendlyName(false));
                } catch (IOException cantGetDeviceName) {
                }
            }

            public void inquiryCompleted(int discType) {
                System.out.println("Device Inquiry completed!");
                synchronized(inquiryCompletedEvent){
                    inquiryCompletedEvent.notifyAll();
                }
            }

            public void serviceSearchCompleted(int transID, int respCode) {
            }

            public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
            }
        };

        synchronized(inquiryCompletedEvent) {
            boolean started = LocalDevice.getLocalDevice().getDiscoveryAgent().startInquiry(DiscoveryAgent.GIAC, listener);
            if (started) {
                //wait for device inquiry to complete
                inquiryCompletedEvent.wait();
                System.out.println(devicesDiscovered.size() +  " device(s) found");
               
            }
        }
    }
    public Vector getDevicesDiscovered() {
return devicesDiscovered;
}

    
}


Note: Application start on UI class. 




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String sql="SELECT * FROM tablename WHERE user=?";

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try {
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import java.util.ArrayList;
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public static void main(String[] args) {


ArrayList data= new ArrayList();
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data.add("java");  // 0 index
data.add("android"); // 1 index


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System.out.println(data.get(3));


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Check screen short for java class.


Output Screen 


IF you have more Query ,Write comment blow  

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import java.util.ArrayList;
public class Jnext_Demo {

public static void main(String[] args) {


ArrayList data= null;
//now ADD data in array list  1 string insert  in array list
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}
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check screen short.


Null pointer Exception Solution  






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