maincanvas.java

是一本开发J2ME程序的50个例题的源代码

package demo;

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.Sprite;


public class MainCanvas extends GameCanvas implements Runnable{
	public static final int GAME_UI		= 0;	//进入用户界面
	public static final int GAME_GAMING	= 1;	//进行游戏
	public static final int GAME_STATE_NUM = 2;	//状态总数
	private int m_nState	= GAME_UI;				//存储当前的游戏状态
	private boolean	m_bRunning;					//控制线程运行
	
	private Sprite m_MMSp;							//MM精灵
	private Clothes m_Clothes;						//服装对象
	private MyUI m_UI;								//界面对象
	private MyBack m_Back;							//背景对象
	public MainCanvas(){
		super(true);
		m_UI 	= new MyUI();
		m_Back	= new MyBack();
		try{
			//创建MM
			Image imgMM = Image.createImage("/demo/MM.png");
			m_MMSp = new Sprite(imgMM,60,117);
			m_MMSp.defineReferencePixel(30,58);
			int x = getWidth() - 40;
			int y = getHeight()/2;
			m_MMSp.setRefPixelPosition(x, y);
			
			m_Clothes = new Clothes();
		}
		catch (Exception ex){}
		Start();								//启动线程
	}
	public void Start(){
		m_bRunning = true;
		Thread thread = new Thread(this);		//分配新线程
		thread.start();							//线程启动
	}
	public void run() {						//新线程自动调用此方法
		//获取系统当前时间，并将时间换算成以毫秒为单位的数
		long T1 = System.currentTimeMillis();
		long T2 = T1;
		while(m_bRunning){
			T2 = System.currentTimeMillis();
			if( T2 - T1 > 100 ){			    //间隔100毫秒
				T1 = T2;
				Input();
				Logic();
				Paint();
			}
		}
	}
	public void Stop(){						//终止游戏
		m_bRunning = false;
	}
	public void Input(){
		int keyStates = getKeyStates();
		switch( m_nState ){
		case GAME_UI:							//进入界面
			m_UI.Input( keyStates );
			if( m_UI.getState() == MyUI.UI_HIDE )
				m_nState = GAME_GAMING;
			break;					
		case GAME_GAMING:						//进入游戏
			m_Clothes.Input(keyStates);
			break;
		}
	}
	public void Logic(){
	}
	public void Paint(){
		Graphics g = getGraphics();
		//用黑色清屏
		g.setColor(0);
		g.fillRect( 0, 0, getWidth(), getHeight() );

		
		switch( m_nState ){						//显示界面
		case GAME_UI:
			m_UI.Paint(g, getWidth(), getHeight());
			break;			
		case GAME_GAMING:						//显示游戏图像
			m_Back.Paint(g, getWidth(), getHeight());
			m_MMSp.paint(g);
			m_Clothes.Paint(g, m_MMSp.getRefPixelX(),m_MMSp.getRefPixelY());
			break;
		}
		flushGraphics();
	}
}