J2ME音乐程序【原创】

import java.io.IOException;

import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.io.file.IllegalModeException;
import javax.microedition.lcdui.*;
import javax.microedition.media.*;
import javax.microedition.media.control.*;


class DemoCanvas extends Canvas{

byte C4 = ToneControl.C4;
byte D4 = (byte)(C4+2);
byte E4 = (byte)(C4+4);
byte G4 = (byte)(C4+5);
byte S4 = (byte)(C4+7);
byte L4 =(byte)(C4+9);
byte X4 = (byte)(C4+11);
byte O4 = (byte)(C4+13);

private void simpleTone(){
 
   try{
    Manager.playTone(ToneControl.C4, 100, 80);
   }catch (Exception ex){}
}

protected void keyPressed(int keyCode){
   if(keyCode == KEY_NUM1)
   {
    simpleTone();
   }
   else if(keyCode == KEY_NUM2)
   {
    try{
     Manager.playTone(D4, 100, 80);
    }catch (Exception ex){}
   }else
    if(keyCode == KEY_NUM3){
     try{
      Manager.playTone(E4, 100, 80);
     }catch (Exception ex){}
    }
    else if(keyCode == KEY_NUM4){
     try{
      Manager.playTone(G4, 100, 80);
     }catch (Exception ex){}
    }
    else if(keyCode == KEY_NUM5)
    {
     try{
      Manager.playTone(S4, 100, 80);
     }catch (Exception ex){}
    }
    else if(keyCode == KEY_NUM6){
     try{
      Manager.playTone(L4, 100, 80);
     }catch (Exception ex){}
    }else if(keyCode == KEY_NUM7)
    {
     try{
      Manager.playTone(X4, 100, 80);
     }catch (Exception ex){}
    }else if(keyCode == KEY_NUM8){
     try{
      Manager.playTone(O4, 100, 80);
     }catch (Exception ex){}
    }
 
}

protected void paint(Graphics g) {
   g.setColor(0x00FF6633);
   g.fillRect(0, 0, this.getWidth(), this.getHeight());
   g.setColor(0x00ffffff);
   g.drawString("│5 3 3 -│4 2 2 -│1 2 3 4│5 5 5 -│ ", 0, 0, Graphics.TOP|Graphics.LEFT);

   g.drawString("│5 3 3 -│4 2 2 -│1 3 5 5│3 - - -│ ", 0, 40, Graphics.TOP|Graphics.LEFT);
   g.drawString("│2 2 2 2│2 3 4 -│3 3 3 3│3 4 5 -│ ", 0, 80, Graphics.TOP|Graphics.LEFT);
   g.drawString("│5 3 3 -│4 2 2 -│1 3 5 5│1 - - -│ ", 0, 120, Graphics.TOP|Graphics.LEFT);
   g.setFont(Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_LARGE));
   g.drawString("请根据以上乐谱弹奏可爱的《小蜜蜂》吧 ", 0, 140, Graphics.TOP|Graphics.LEFT);
 


}

}

public class PlaySimpleTone extends MIDlet implements CommandListener {

private Player mp;
private Display display;
private DemoCanvas myDemo;


private Command exitCommand = new Command("Exit",Command.EXIT,1);
private Command playCommand = new Command("Play",Command.ITEM,1);


public PlaySimpleTone() {
   display = Display.getDisplay(this);
   myDemo = new DemoCanvas();
   myDemo.addCommand(exitCommand);
   myDemo.addCommand(playCommand);
   myDemo.setCommandListener(this);
 
 
 
}

public void commandAction(Command c,Displayable s)
{
   if(c == exitCommand){
 
     try {
      destroyApp(false);
     } catch (MIDletStateChangeException e) {
    
      e.printStackTrace();
     }
     notifyDestroyed();
  
   }
   else if(c == playCommand){
    simpleTone();
   }
}

private void simpleTone(){
 
   try{
    Manager.playTone(ToneControl.C4, 100, 80);
   }catch (Exception ex){}
}

protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
 

}

protected void pauseApp() {
 

}

protected void startApp() throws MIDletStateChangeException {
   display.setCurrent(myDemo);

}

}