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import java.util.Enumeration;
import java.util.Hashtable;
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.Gauge;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.ItemStateListener;
import javax.microedition.lcdui.List;
import javax.microedition.media.Manager;
import javax.microedition.media.Player;
import javax.microedition.media.control.VolumeControl;
import javax.microedition.midlet.MIDlet;
class CachedAudioPlayerCanvas implements ItemStateListener {
private CachingAudioPlayer parent;
private Form form = new Form("");
private Gauge gauge = new Gauge("Volume: 50", true, 100, 50);
private VolumeControl volume;
private Player player;
private boolean paused = false;
private Hashtable players = new Hashtable();
public CachedAudioPlayerCanvas(CachingAudioPlayer parent) {
this.parent = parent;
form.append(gauge);
form.addCommand(parent.exitCommand);
form.addCommand(parent.backCommand);
form.setCommandListener(parent);
form.setItemStateListener(this);
}
public void playMedia(String locator) {
try {
player = (Player) players.get(locator);
if (player == null) {
player = Manager.createPlayer(getClass().getResourceAsStream(locator), "audio/x-wav");
player.prefetch();
players.put(locator, player);
}
volume = (VolumeControl) player.getControl("VolumeControl");
volume.setLevel(50);
gauge.setValue(volume.getLevel());
gauge.setLabel("Volume: " + volume.getLevel());
player.setLoopCount(2);
player.start();
form.setTitle("Playing " + locator);
} catch (Exception e) {
e.printStackTrace();
}
}
public void pauseMedia() {
if (player != null) {
try {
player.stop();
paused = true;
} catch (Exception e) {
}
}
}
public void restartMedia() {
if (player != null) {
try {
player.start();
paused = false;
} catch (Exception e) {
}
}
}
public boolean isPlayerPaused() {
return paused;
}
public Form getForm() {
return this.form;
}
public void itemStateChanged(Item item) {
volume.setLevel(gauge.getValue());
gauge.setLabel("Volume: " + volume.getLevel());
}
public void cleanUp() {
if (player != null) {
try {
player.setMediaTime(0);
} catch (Exception e) {
}
player.deallocate();
player = null;
}
}
public void closeAll() {
for (Enumeration e = players.elements(); e.hasMoreElements();) {
Player p = (Player) e.nextElement();
p.close();
}
}
}
public class J2MECachingAudioPlayer extends MIDlet implements CommandListener {
private String[] audioDisplayList = { "B", "A", "L" };
private String[] audioList = { "/b.wav", "/a.wav", "/l.wav" };
protected Display display;
private CachedAudioPlayerCanvas canvas;
private List list = new List("Pick an Audio file", List.IMPLICIT, audioDisplayList, null);
protected Command exitCommand = new Command("Exit", Command.EXIT, 1);
protected Command backCommand = new Command("Back", Command.BACK, 1);
public J2MECachingAudioPlayer() {
list.addCommand(exitCommand);
list.setCommandListener(this);
canvas = new CachedAudioPlayerCanvas(this);
display = Display.getDisplay(this);
}
public void startApp() {
if (canvas.isPlayerPaused()) {
canvas.restartMedia();
display.setCurrent(canvas.getForm());
} else {
display.setCurrent(list);
}
}
public void pauseApp() {
canvas.pauseMedia();
}
public void destroyApp(boolean unconditional) {
canvas.closeAll();
}
public void commandAction(Command command, Displayable disp) {
if (command == exitCommand) {
canvas.closeAll();
notifyDestroyed();
return;
} else if (command == backCommand) {
canvas.cleanUp();
display.setCurrent(list);
return;
}
}
}
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