music.java

这是一个Java编写的手机象棋游戏

import javax.microedition.media.*;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;
import java.io.IOException;

public class Music implements Runnable, PlayerListener
{
	private boolean		isMoving = false;
	private String		url = null;
	private Displayable dis = null;
	private boolean		isOpen = true;
	private Player		p = null;
	//private VolumeControl	vc = null;
	private String[]	musicList = null;
	private int			num = 0;
	
	public Music(Displayable c, boolean b)
	{
		isMoving = b;
		dis = c;
	}
	public void moving()
	{
		new Thread(this).start();
	}
	public void playing()
	{
		//System.out.println("开始获取音乐列表");
		getMusicList();
		//System.out.println("获取音乐列表完毕");
		if(musicList == null)
		{
			Alert alert=new Alert("Message","没有设置播放列表",null,AlertType.WARNING);
			Chess.dis.setCurrent(alert, dis);
			return;
		}
		new Thread(this).start();
	}
	public void run()
	{
		try
		{
			if(isMoving)
			{
				Manager.playTone(50,500,100);
			}
			else
			{
				p = Manager.createPlayer(musicList[num]);
				p.realize();
				//vc = (VolumeControl)p.getControl("VolumeControl");
				p.start();
			}
		}
		catch(MediaException me)
		{
			Alert alert=new Alert("Message","播放音乐时出现异常",null,AlertType.WARNING);
			Chess.dis.setCurrent(alert, dis);
		}
		catch(IOException ie)
		{
			Alert alert=new Alert("Message","读取音乐时出现异常",null,AlertType.WARNING);
			Chess.dis.setCurrent(alert, dis);
		}
	}
	private void getMusicList()
	{//读取背景音乐列表
		MusicRecord mr = null;
		try
		{
			//System.out.println("开始打开音乐记录");
			mr = new MusicRecord();
			//System.out.println("打开音乐记录完毕");
			musicList = mr.getMusicList();
			//可能是null
			//System.out.println("音乐列表的长度:"+musicList.length);
		}
		catch(RecordStoreException rse)
		{
			Alert alert=new Alert("Message","读取音乐列表时出现异常",null,AlertType.WARNING);
			Chess.dis.setCurrent(alert, dis);
		}
		mr.closeMusicRecord();
	}
	public void playerUpdate(Player p, String event, Object eventData)
	{
		if(event == PlayerListener.END_OF_MEDIA)
		{
			num = (num++)%(musicList.length);
			new Thread(this).start();
		}
	}
};