j2me多媒体，mmapi

package com; import java.io.IOException; import java.io.InputStream; import javax.microedition.lcdui.*; import javax.microedition.media.*; import javax.microedition.media.control.*; import javax.microedition.midlet.*; public class PlayerMIDlet extends MIDlet implements CommandListener, PlayerListener, Runnable { private Display display; private Form form; private TextField url; private Command start = new Command("Play", Command.SCREEN, 1); private Command stop = new Command("Stop", Command.SCREEN, 2); private Command recordVideo = new Command("重放", Command.SCREEN,3); private Command back = new Command("返回", Command.BACK,4); private Player player; public PlayerMIDlet() { display = Display.getDisplay(this); form = new Form("Demo Player"); url = new TextField("Enter URL:", "", 100, TextField.URL); // form.append(url); form.addCommand(start); form.addCommand(stop); form.setCommandListener(this); display.setCurrent(form); } protected void startApp() { try { if (player != null && player.getState() == Player.PREFETCHED) { player.start(); } else { defplayer(); display.setCurrent(form); } } catch (MediaException me) { reset(); } } protected void pauseApp() { try { if (player != null && player.getState() == Player.STARTED) { player.stop(); } else { defplayer(); } } catch (MediaException me) { reset(); } } protected void destroyApp(boolean unconditional) { form = null; try { defplayer(); } catch (MediaException me) { } } public void playerUpdate(Player player, String event, Object data) { if (event == PlayerListener.END_OF_MEDIA) { try { defplayer(); } catch (MediaException me) { } reset(); } } public void commandAction(Command c, Displayable d) { if (c == start) { start(); } else if (c == stop) { stopPlayer(); }else if (c == recordVideo) { start(); } } public void start() { Thread t = new Thread(this); t.start(); } // to prevent blocking, all communication should // be in a thread // and not in commandAction public void run() { play("http://java.sun.com/products/java-media/mma/media/test-mpeg.mpg"); } String getURL() { return url.getString(); } public void playAudio() { try { InputStream is = getClass().getResourceAsStream("/test-mpeg.mpg"); Player player = Manager.createPlayer(is, "audio/X-mpg"); player.start(); } catch (IOException ioe) { } catch (MediaException me) { } } void play(String url) { try { VideoControl vc; defplayer(); // create a player instance // InputStream is = getClass().getResourceAsStream("/test-mpeg.mpg"); // player = Manager.createPlayer(is, "audio/x-mpg"); player = Manager.createPlayer(url); player.setLoopCount(-1); player.addPlayerListener(this); // realize the player player.realize(); vc = (VideoControl) player.getControl("VideoControl"); if (vc != null) { Item video = (Item) vc.initDisplayMode(vc.USE_GUI_PRIMITIVE, null); Form v = new Form("Playing Video..."); StringItem si = new StringItem("Status: ", "Playing..."); v.append(si); v.addCommand(stop); v.append(video); display.setCurrent(v); } player.prefetch(); player.start(); } catch (Throwable t) { reset(); } } void defplayer() throws MediaException { if (player != null) { if (player.getState() == Player.STARTED) { player.stop(); } if (player.getState() == Player.PREFETCHED) { player.deallocate(); } if (player.getState() == Player.REALIZED || player.getState() == Player.UNREALIZED) { player.close(); } } player = null; } void reset() { player = null; } void stopPlayer() { try { defplayer(); } catch (MediaException me) { } reset(); } }