bluetoothmidlet.java

j2me bluetooth 示例

package midlet.bluetoothone;

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.lcdui.List;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

/**
 * <p>蓝牙入门示例</p>
 * 
 * @author 刘光辉
 * @version 2009.02.04
 */
public class BluetoothMIDlet extends MIDlet implements CommandListener{

	private List list;
	private ServerBox server;
	private ClientBox client;
	
	protected void startApp() throws MIDletStateChangeException {
		list = new List("蓝牙入门示例",List.IMPLICIT);
		list.append("服务端", null);
		list.append("客户端", null);
		list.setCommandListener(this);
		Display.getDisplay(this).setCurrent(list);
	}
	
    public void showString(String s)
	{ 
        Displayable dp = Display.getDisplay(this).getCurrent(); 
        Alert al = new Alert(null, s, null, AlertType.INFO); 
        al.setTimeout(2000); 
        Display.getDisplay(this).setCurrent(al, dp); 
    } 
    
    public void showMainMenu(){ 
        Display.getDisplay(this).
		setCurrent(list); 
    } 
    
	protected void pauseApp() {
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
	}

	public void commandAction(Command c, Displayable d) {
		if(c == List.SELECT_COMMAND){
			List list = (List) d;
			int index = list.getSelectedIndex();
			if(index == 0){
				if(server == null){
					server = new ServerBox(this);
				}
				server.setString(null);
				Display.getDisplay(this).setCurrent(server);
			}
			else{
                //每次都生成新的客户端实例 
				client = null; 
                System.gc(); 
                client = new ClientBox(this); 
                Display.getDisplay(this).setCurrent(client); 
			}
		}
	}

}