playerui.java

< JavaME核心技术最佳实践>>的全部源代码

package com.j2medev.chapter7;

import java.io.IOException;
import java.io.InputStream;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Item;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.PlayerListener;
import javax.microedition.media.control.GUIControl;
import javax.microedition.media.control.VideoControl;
import javax.microedition.media.control.VolumeControl;

public class PlayerUI extends Canvas implements Runnable,CommandListener,PlayerListener{
    
    private Player player = null;
    private MainMIDlet midlet = null;
    private int type = 1;
    private long ptime = 0;
    private String title = "";
    private long duration = 0;
    private int percent = 0;
    private Thread currentThread = null;
    private boolean stop = false;
    public static final int WAV = 1;
    public static final int VIDEO = 2;
    private Command backCommand = new Command("Back",Command.BACK,1);
    private Command pauseCommand = new Command("pause",Command.OK,2);
    private Command playCommand = new Command("Play",Command.OK,2);
    
    public PlayerUI(MainMIDlet midlet) {
        this.midlet = midlet;
        this.addCommand(pauseCommand);
        this.addCommand(backCommand);
        this.setCommandListener(this);
    }
    
    public void setType(int type){
        this.type = type;
    }
    
    public void paint(Graphics g){
        int w = getWidth();
        int h = getHeight();
        g.setColor(0xFFFFFF);
        g.fillRect(0, 0, w, h);
        //如果是wav文件，显示播放进度
        if(type == WAV){
            g.setColor(0x000000);
            g.drawRect((w-100)/2,h-10,100,6);
            g.setColor(255,0,0);
            g.fillRect((w-100)/2+1,h-9,percent,5);
        }
    }
    //启动player
    public void startPlayer(){
        if(currentThread == null){
            stop = false;
            currentThread = new Thread(this);
            currentThread.start();
        }else if(player != null){
            try {
                player.start();
            } catch (MediaException ex) {
                ex.printStackTrace();
            }
        }
    }
    
    //根据type类型创建不同的播放器
    public void createPlayer(){
        if(type == WAV){
            try{
                InputStream is = getClass().getResourceAsStream("/bark.wav");
                player = Manager.createPlayer(is,"audio/x-wav");
                player.setLoopCount(-1);
            }catch(MediaException ex){
                ex.printStackTrace();
            }catch(IOException ex){
                ex.printStackTrace();
            }
        }else if(type == VIDEO){
            try{
                InputStream is = getClass().getResourceAsStream("/moon.mpg");
                player = Manager.createPlayer(is,"video/mpeg");
            }catch(MediaException ex){
                ex.printStackTrace();
            }catch(IOException ex){
                ex.printStackTrace();
            }
        }
    }
    public void run(){
        try{
            if(player == null){
                createPlayer();
            }
            player.realize();
            if(type == WAV){
                duration = player.getDuration();
                player.prefetch();
                player.start();
                while(!stop){
                    try{
                        long t = player.getMediaTime();
                        percent = (int)((100*t)/duration);
                        Thread.sleep(100);
                        repaint();
                    }catch(InterruptedException ex){
                        
                    }
                }
            }else{
                player.addPlayerListener(this);
                VideoControl vc = (VideoControl)player.getControl("VideoControl");
              /*  Form form = new Form("test");
                form.append((Item)vc.initDisplayMode(GUIControl.USE_GUI_PRIMITIVE,null));
                midlet.setCurrent(form);
               */
                if(vc != null){
                    vc.initDisplayMode(VideoControl.USE_DIRECT_VIDEO,this);
                    //vc.setDisplayFullScreen(true);
                    vc.setDisplayLocation(0,0);
                    vc.setVisible(true);
                }
                player.start();
            }
        }catch(MediaException ex){
            ex.printStackTrace();
        }
    }
    
    //停止播放器
    public void stopPlayer(){
        try {
            currentThread = null;
            stop = true;
            Thread.sleep(100);
        } catch (InterruptedException ex) {
            ex.printStackTrace();
        }
        if(player != null){
            player.close();
            player = null;
        }
    }
    
    public void pausePlayer(){
        if(player != null){
            try{
                player.stop();
            }catch(MediaException ex){
                ex.printStackTrace();
            }
        }
    }
    
    public void commandAction(Command cmd,Displayable displayable){
        if(cmd == pauseCommand){
            removeCommand(pauseCommand);
            addCommand(playCommand);
            ptime = player.getMediaTime();
            pausePlayer();
        }else if(cmd == playCommand){
            removeCommand(playCommand);
            addCommand(pauseCommand);
            try {
                player.setMediaTime(ptime);
                player.start();
            } catch (MediaException ex) {
                ex.printStackTrace();
            }
        }else if(cmd == backCommand){
            stopPlayer();
            removeCommand(playCommand);
            addCommand(pauseCommand);
            midlet.setCurrent(midlet.getMenu());
        }
    }
    
    protected void keyPressed(int keyCode) {
        int action = getGameAction(keyCode);
        VolumeControl vc = (VolumeControl)player.getControl("VolumeControl");
        if(action == DOWN){
            vc.setLevel(vc.getLevel()-10);
        }else if(action == UP){
            vc.setLevel(vc.getLevel()+10);
        }
    }
    
    public void playerUpdate(Player player, String string, Object object) {
        if(string.equals(this.END_OF_MEDIA)){
            stopPlayer();
            midlet.setCurrent(midlet.getMenu());
        }
    }
}