btclient.java

服务器客户端源文件：btClient-20050819.zip

package btClient;

import java.io.DataOutputStream;
import java.io.DataInputStream;

import javax.bluetooth.DiscoveryAgent;
import javax.bluetooth.LocalDevice;
import javax.bluetooth.ServiceRecord;
import javax.bluetooth.UUID;
import javax.microedition.io.Connector;
import javax.microedition.io.StreamConnection;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.StringItem;
import javax.microedition.midlet.MIDlet;

import net.benhui.btgallery.bluelet.BLUElet;

public class btClient extends MIDlet implements CommandListener {
    public static btClient instance;
    public static Display display;
    public Form mainForm;            
    public String localAdd;
    public Alert alert;    
    
    // Main form
    public static final Command seCommand = new Command ("Search", Command.SCREEN, 1);
    public static final Command fbCommand = new Command ("File Browser", Command.SCREEN, 2);       
    public static final Command exitCommand = new Command ("Exit", Command.EXIT, 0);        
    public StringItem status = new StringItem ("Status: ", "No server found.");        
    
    // List page
    public String[] files = new String[100];
    public List fileList;
    public static final Command dlCommand = new Command ("Download", Command.SCREEN, 1);
    public static final Command upCommand = new Command ("Update", Command.SCREEN, 2);
    public static final Command backCommand = new Command("Back", Command.BACK, 0);    
              
    // BLUElet component
    // To perform device discovery, device selection and service discovery
    public BLUElet bluelet = null;
    public ServiceRecord r;
    public String url;    
    StreamConnection con;
    
    public void startApp() throws javax.microedition.midlet.MIDletStateChangeException {
        display = Display.getDisplay (this);
        bluelet.startApp();        
        display.setCurrent (mainForm);             
       }
    
    public void pauseApp() {
        // Do Bluelet pause app
        bluelet.pauseApp();
    }
    
    public void destroyApp(boolean unconditional) {
        // Do Bluelet destroy app
        bluelet.destroyApp( unconditional );
    }

    public static void quitApp() {
      instance.destroyApp(true);
      instance.notifyDestroyed();
      instance = null;
    }
    
    public btClient() {
        instance = this;
        bluelet = new BLUElet( this, this );                
        
        // Get bluetooth device info
        try {
            localAdd = LocalDevice.getLocalDevice().getBluetoothAddress();
        } catch (Exception e) {
            printMsg(e.toString()); 
            }
                
        // Draw form
        mainForm = new Form ("btClient v1.0");        
        mainForm.addCommand (seCommand);
        mainForm.addCommand (fbCommand);        
        mainForm.addCommand (exitCommand);           	                        
        mainForm.append (status);                
    	mainForm.setCommandListener (this); 
    	    	   
    	fileList = new List ("File Browser", Choice.IMPLICIT);
    	fileList.append("superStar.mid",null);
        fileList.addCommand(dlCommand);
        fileList.addCommand(upCommand);
        fileList.addCommand(backCommand);
        fileList.setCommandListener (this);
    }
    
    public void commandAction (Command c, Displayable d) {
        // Exit Command
        if (c == exitCommand) {
          notifyDestroyed();
        }
        // Search Command
        else if (c == seCommand) {    
            bluelet.startInquiry( DiscoveryAgent.GIAC, new UUID[]{ new UUID("32df102b20d64f0b8b1f45d824eff75f", false) });
            display.setCurrent( bluelet.getUI() );                       
        }
        // File Browser Command
        else if (c == fbCommand) {           
            display.setCurrent (fileList);                        
        }
        // Update List Command
        else if (c == upCommand) {                        
            getList();         
        }        
        // Download Command
        else if (c == dlCommand) {                                              
            getFile(fileList.getString(fileList.getSelectedIndex()));            
        }        
        //Back Command
        else if (c == backCommand) {
            display.setCurrent (mainForm);
        } 
        else if( c == List.SELECT_COMMAND ){                                 
            getFile(fileList.getString(fileList.getSelectedIndex()));
        }
        // BLUElet Selected Command
        else if ( c.equals( BLUElet.SELECTED ) ) {
            printMsg("Performing service discovery.....");          
        } 
        // BLUElet Back Command
        else if ( c.equals( BLUElet.BACK ) ) {
            display.setCurrent( mainForm );
        } 
        // BLUElet Completed Command
        else if ( c.equals( BLUElet.COMPLETED ) ) { 
            r = bluelet.getFirstDiscoveredService();
            url  = r.getConnectionURL(ServiceRecord.NOAUTHENTICATE_NOENCRYPT, false );
            status.setText("Server found.");
            display.setCurrent( mainForm );
      }
    }    
           
    public void getFile(String f){       
       try {                           		
           con = (StreamConnection) Connector.open(url);                                           
           DataOutputStream out = con.openDataOutputStream();
           
           out.writeUTF("sendFile" ); // Request file 
           out.flush();                
           out.writeUTF(f); // filename to download
           out.flush();                
           out.writeUTF(localAdd); // client bt address
           out.flush();
           
           out.close();           
           con.close();
           printMsg("Downloading file ...");
           } catch (Exception e) {                 
                printMsg(e.toString());
           }
        } 
    
    public void getList() {
        String[] tmpList = new String[100];
        String tmpFile;
        
        try {
            con = (StreamConnection) Connector.open(url);
            
            DataOutputStream out = con.openDataOutputStream();            
			out.writeUTF("sendList" ); 
			out.flush();
			out.close();

			DataInputStream in = con.openDataInputStream();			
			tmpFile=in.readUTF();			
			in.close();
			
			con.close();
			
			// Break String back to String array
			int c = 0;
			char chr = ','; // String separator
			
	        while (true) {
	            if (tmpFile.indexOf(chr) != tmpFile.lastIndexOf(chr)) {                
	                tmpList[c] = tmpFile.substring(0,tmpFile.indexOf(","));                
	                tmpFile = tmpFile.substring(tmpFile.indexOf(",") + 1);
	            	c++; 
	            }
	            else {
	                tmpList[c] = tmpFile.substring(0,tmpFile.indexOf(","));
	                c++;
	                tmpList[c] = tmpFile.substring(tmpFile.indexOf(",") + 1);
	                c++;      
	                break;
	            }
	        }			
			     
			// Clear fileList
			fileList.deleteAll();
			// Update file list
	        for (int i=0; i<c ;i++) 
	            fileList.append(tmpList[i],null);

			printMsg("List Updated.");
        } catch (Exception e) {                
            printMsg(e.toString());
        }
    }
    
    public void printMsg(String s){
        alert = new Alert("btClient");
        alert.setTimeout(5000);
        alert.setType(AlertType.INFO);
        alert.setString(s);
        Display.getDisplay(this).setCurrent(alert);        
    }
}