DZone Snippets: microedition code

J2ME - getIPdevice

whitetiger () — Wed, 28 Feb 2007 00:15:46 GMT

// Retrevie IP device



package org.socketdemo;



import javax.microedition.io.Connector;

import javax.microedition.io.SocketConnection;

import javax.microedition.lcdui.Alert;

import javax.microedition.lcdui.AlertType;

import javax.microedition.lcdui.Command;

import javax.microedition.lcdui.CommandListener;

import javax.microedition.lcdui.Display;

import javax.microedition.lcdui.Displayable;

import javax.microedition.midlet.MIDlet;

import javax.microedition.midlet.MIDletStateChangeException;



public class SocketDEMO extends MIDlet implements CommandListener

{

	protected SocketDEMO midlet = this;

	

	private Alert info;

	

	protected void destroyApp(boolean value) throws MIDletStateChangeException

	{

		notifyDestroyed();

	}



	protected void pauseApp()

	{



	}



	protected void startApp() throws MIDletStateChangeException

	{

		new Thread()

		{

			public void run()

			{

				SocketConnection socket = null;

				

				try

				{

					socket = (SocketConnection) Connector.open("socket://193.204.114.233:13");

					

					socket.openInputStream();

					

					info = new Alert("Info", "Current IP: " + socket.getLocalAddress() + "\nPort: " + socket.getLocalPort(), null, AlertType.INFO);

					info.setTimeout(Alert.FOREVER);

					info.setCommandListener(midlet);

					

					getDisplay().setCurrent(info);

				}

				catch(Exception error)

				{

					info = new Alert("Info", "Current IP: N/A\nPort: N/A", null, AlertType.INFO);

					info.setTimeout(Alert.FOREVER);

					info.setCommandListener(midlet);

					

					getDisplay().setCurrent(info);

				}

				finally

				{

					if(socket != null)

					{

						try

						{

							socket.close();

						}

						catch(Exception error)

						{

							

						}

					}

				}

			}

		}.start();

	}

	

	protected Display getDisplay()

	{

		return Display.getDisplay(this);

	}



	public void commandAction(Command cmd, Displayable dsp)

	{

		if(cmd == Alert.DISMISS_COMMAND)

		{

			try

			{

				destroyApp(true);

			}

			catch(MIDletStateChangeException error)

			{

			

			}

		}

	}

}

J2ME - Alert Bloccante

whitetiger () — Sat, 24 Feb 2007 14:20:02 GMT

// description of your code here



import javax.microedition.lcdui.Alert;

import javax.microedition.lcdui.AlertType;

import javax.microedition.lcdui.Command;

import javax.microedition.lcdui.CommandListener;

import javax.microedition.lcdui.Displayable;



public class MessageBox extends Alert implements CommandListener

{

	protected Chattando midlet;

	

	private boolean isReady = false;

	

	private Displayable dspBACK;

	

	public MessageBox(String title, String text, AlertType type, Chattando midlet)

	{

		super(title, text, null, type);

		

		this.midlet = midlet;

		

		this.setCommandListener(this);

		this.setTimeout(Alert.FOREVER);

		

		// Display Precedente

		dspBACK = midlet.getDisplay().getCurrent();

		

		// Mostra l'alert

		midlet.getDisplay().setCurrent(this);

		

		// Attendi la conferma di chiusura

		waitForDone();

		

		// Visualizza il precedente Display

		midlet.getDisplay().setCurrent(dspBACK);

	}

	

	private void waitForDone()

	{

		try

		{

			while(!isReady)

			{

				synchronized(this)

				{

					this.wait();

					

				}

			}

		}

		catch(Exception error)

		{

			

		}

	}



	public void commandAction(Command cmd, Displayable dsp)

	{

		if(cmd == Alert.DISMISS_COMMAND)

		{

			isReady = true;

			

			synchronized(this)

			{

				this.notify();

			}			

		}

	}

}

J2ME - Create Service Bluetooth

whitetiger () — Fri, 23 Feb 2007 14:22:23 GMT

// Create Service Bluetooth



import javax.bluetooth.DiscoveryAgent;

import javax.bluetooth.LocalDevice;

import javax.microedition.io.Connector;

import javax.microedition.io.StreamConnection;

import javax.microedition.io.StreamConnectionNotifier;



public class ServerChat

{

	private static final String CHATTANDO_UUID = "A1A2A3A4A5A6A7A8A9A0B1B2B3B4B5B6";

	private static final String CHATTANDO_SERVICE = "Chattando";

	

	private boolean isReady = false;

	

	private StreamConnection stream_connection;

	private StreamConnectionNotifier stream_connection_notifier;

	

	public ServerChat()

	{

		startServerChatBluetooth();

	}

	

	// Apre il servizio per la Chat

	public void startServerChatBluetooth()

	{

		new Thread()

		{

			public void run()

			{

				try

				{

					LocalDevice.getLocalDevice().setDiscoverable(DiscoveryAgent.GIAC);

				}

				catch(Exception error)

				{

					error.printStackTrace();

				}

				

				try

				{

					stream_connection_notifier = (StreamConnectionNotifier) Connector.open("btspp://localhost:" + CHATTANDO_UUID + ";name=" + CHATTANDO_SERVICE);

				}

				catch(Exception error)

				{

					error.printStackTrace();

				}

				

				stopServerChatBluetooth();

				

				// Mette in ascolto il Server della Chat

				isReady = true;

				

				try

				{

					while(isReady)

					{

						System.out.println("Sono in ascolto...");

						

						stream_connection = stream_connection_notifier.acceptAndOpen();

						

						System.out.println("Client Connected");

					}

				}

				catch(Exception error)

				{

					error.printStackTrace();

				}

			}

			

		}.start();

	}



	// Chiude il servizio per la Chat

	public void stopServerChatBluetooth()

	{

		if(isReady)

		{

			isReady = false;

			

			try

			{

				stream_connection_notifier.close();

			}

			catch(Exception error)

			{

				error.printStackTrace();

			}

		}

	}

}

J2ME - Search Service Bluetooth

whitetiger () — Fri, 23 Feb 2007 14:21:30 GMT

// Example Search Service Bluetooth



import java.util.Vector;



import javax.bluetooth.DeviceClass;

import javax.bluetooth.DiscoveryAgent;

import javax.bluetooth.DiscoveryListener;

import javax.bluetooth.LocalDevice;

import javax.bluetooth.RemoteDevice;

import javax.bluetooth.ServiceRecord;

import javax.bluetooth.UUID;



public class ClientChat implements DiscoveryListener

{

	private static final String CHATTANDO_UUID = "A1A2A3A4A5A6A7A8A9A0B1B2B3B4B5B6";

	private static final String CHATTANDO_SERVICE = "Chattando";



	protected Chattando midlet;

	

	private boolean searchDone = false;

	

	private DiscoveryAgent discovery_agent;

	

	private Vector remote_device;

	private Vector device_found;

	

	public ClientChat(Chattando midlet)

	{

		this.midlet = midlet;

		

		startScanBluetoothDevices();

	}

	

	// Avvia la ricerca dei dispositivi Bluetooth

	public void startScanBluetoothDevices()

	{

		try

		{

			remote_device = new Vector();

			device_found = new Vector();

			

			discovery_agent = LocalDevice.getLocalDevice().getDiscoveryAgent();

			discovery_agent.startInquiry(DiscoveryAgent.GIAC, this);

		}

		catch(Exception error)

		{

			error.printStackTrace();

		}

	}

	

	// Stoppa la ricerca dei dispositivi Bluetooth

	public void stopScanBluetoothDevices()

	{

		discovery_agent.cancelInquiry(this);

	}



	public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) 

	{

		// Aggiungo il dispositivo solo se e' un computer (0x0100) o un cellulare (0x0200)

		if(cod.getMajorDeviceClass() == 0x0100 || cod.getMajorDeviceClass() == 0x0200)

			remote_device.addElement(btDevice);

	}



	public void inquiryCompleted(int discType)

	{

		switch(discType)

		{

			case DiscoveryListener.INQUIRY_COMPLETED:

														System.out.println("Device Search Completed");

														

														break;

				

			case DiscoveryListener.INQUIRY_ERROR:

														System.out.println("Device Search Error");

														

														break;

				

			case DiscoveryListener.INQUIRY_TERMINATED:

														System.out.println("Device Search Terminated");

														

														break;

		}

		

		try

		{

			for(int i=0, cnt=remote_device.size(); i			{

				discovery_agent.searchServices(new int[]{ 0x0100, 0x0200 }, new UUID[]{ new UUID(0x0003), new UUID(CHATTANDO_UUID, false) }, (RemoteDevice) remote_device.elementAt(i), this);

				waitForSearchDone();

			}

		}

		catch(Exception error)

		{

			error.printStackTrace();

		}

	}



	// Aspetta che la ricerca dei servizi per il dispositivo sia terminata

	private void waitForSearchDone()

	{

		searchDone = false;

		

		try

		{

			while(!searchDone)

			{

				synchronized(this)

				{

					this.wait();

				}

			}

		}

		catch(Exception error)

		{

			

		}

	}

	

	public void serviceSearchCompleted(int transID, int respCode)

	{

		switch(respCode)

		{

			case DiscoveryListener.SERVICE_SEARCH_COMPLETED:

																		System.out.println("Service Search Completed");

																		

																		break;

				

			case DiscoveryListener.SERVICE_SEARCH_DEVICE_NOT_REACHABLE:

																		System.out.println("Service Search Device not Reachable");

																		

																		break;

				

			case DiscoveryListener.SERVICE_SEARCH_ERROR:

																		System.out.println("Service Search Error");

																		

																		break;

				

			case DiscoveryListener.SERVICE_SEARCH_NO_RECORDS:

																		System.out.println("Service Search No Records");

																		

																		break;

				

			case DiscoveryListener.SERVICE_SEARCH_TERMINATED:

																		System.out.println("Service Search Terminated");

																		

																		break;

		}

		

		searchDone = true;

		

		// Risveglia il processo in attesa del completamento della ricerca dei servizi per un dispositivo

		synchronized(this)

		{

			this.notifyAll();

		}

	}



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

	{

		for(int i=0, cnt=servRecord.length; i		{

			if(((String) servRecord[i].getAttributeValue(0x0100).getValue()).equalsIgnoreCase(CHATTANDO_SERVICE))

			{

				device_found.addElement(servRecord[i].getHostDevice());

			}

		}

	}

}