التحكم بمستوى الصوت للبرنامج

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;

import javax.microedition.lcdui.Ticker;

import javax.microedition.media.*;

public class VolumeControlDemo extends MIDlet implements CommandListener {

private Display display;

private Command exit,incr,decr;

Form frm;

VolumeControl vc;

int vol;

Player player;

public VolumeControlDemo() {

display = Display.getDisplay(this);

}

public void startApp() {

frm=new Form("VolumeControlDemo Demo");

exit= new Command("Exit",Command.EXIT,1);

decr= new Command("Decrease",Command.EXIT,1);

incr= new Command("Increase",Command.EXIT,1);

frm.addCommand(exit);

frm.addCommand(decr);

frm.addCommand(incr);

frm.setCommandListener(this);

display.setCurrent(frm);

try {

// Creating player object

player = Manager.createPlayer("/demo.wav");

// Setting loop count

player.setLoopCount(-1);

// Start sound

player.start();

Control cs[];

// Getting Controls object

cs = player.getControls();

for (int i = 0; i < cs.length; i++) {

if (cs[i] instanceof VolumeControl)

// Getting volume control

vc=(VolumeControl)cs[i];

}

} catch (Exception e) {}

}

public void pauseApp() {

}

public void destroyApp(boolean un) {

}

public void commandAction(Command cmd,Displayable d) {

try {

if(decr) {

if(vol>0) vol--;

vc.setLevel(vol);

} else if() {

if(vol<99) vol--;

vc.setLevel(vol);

}

frm.appent("vol="+vc.getLevel());

}catch(Exception e){}

}

}