J2ME学习之声音的播放

下面是一个简单的利用J2ME播放音频的例子

（注意：默认的WTK2.5.2不支持MP3格式的音频）

在实际应用中，可将下文中的http://localhost:8080/abc/12345.wav改成所需要音频的网址

import java.io.IOException;
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.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.midlet.MIDlet;



public class playmp3 extends MIDlet implements CommandListener {
 private Form form1;
 private Command cmdPlay;
 private Command cmdPause;
 private Command cmdExit;
 private Display disp;
 private Player player;

 public playmp3() {
 form1 = new Form("声音播放");
 cmdPlay = new Command("播放", Command.OK, 1);
 cmdPause = new Command("暂停", Command.CANCEL, 1);
 cmdExit = new Command("退出", Command.EXIT, 1);
 }

 public void commandAction(Command c, Displayable s) {
 if (c == cmdExit) {
 player.close();
 destroyApp(true);
 notifyDestroyed();
 }
 if (c == cmdPlay) {
 form1.removeCommand(cmdPlay);
 form1.addCommand(cmdPause);
 try {
 player.start();
 } catch (MediaException me) {
 me.printStackTrace();
 }
 }
 if (c == cmdPause) {
 form1.removeCommand(cmdPause);
 form1.addCommand(cmdPlay);
 try {
 player.stop();
 } catch (MediaException me) {
 me.printStackTrace();
 }
 }
 }

 public void startApp() {
 form1.append("狗叫");
 form1.addCommand(cmdExit);
 form1.addCommand(cmdPlay);
 form1.setCommandListener(this);
 disp = Display.getDisplay(this);
 disp.setCurrent(form1);
        String b = "http://localhost:8080/abc/12345.wav";
 try {
 player = Manager.createPlayer((b));
 player.realize();
 player.start();
 } catch (IOException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (MediaException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }

 }

 public void pauseApp() {
 }

 public void destroyApp(boolean unconditional) {
 }
}