maincanvas.java

J2ME的砖块游戏！！打砖块游戏！！！开发环境用wTK

package com.yang.c10.Brick;
import java.util.Random;

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


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_END		= 2;	//游戏结束
	public static final int GAME_STATE_NUM = 3;	//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 Random m_Random;						//随机数对象
	private MyUI m_UI;								//界面对象
	private MyBack m_Back;							//背景对象
	private MyRecord m_Record;						//记录对象
	private BrickSprite m_aBrick[][];				//砖块对象数组
	private BarSprite m_Bar;						//木棒对象
	private BallSprite m_Ball;						//小球对象
	private int m_nBallNum = 3;					//总共的小球个数
	public MainCanvas(){
		super(true);
		m_UI	 	= new MyUI();
		m_Back		= new MyBack();
		m_Random 	= new Random();
		m_Record 	= new MyRecord("BrickRecord");
		try{
			//读取砖块图像,并设置初始位置
			Image img = Image.createImage("/c10/Brick/brick.png");
			m_aBrick = new BrickSprite[5][8];
			int x = getWidth()/2 - 15 * 4;
			int y = 20;
			for( int row = 0; row < m_aBrick.length; row ++ ){
				x = getWidth()/2 - 15 * 4;
				for( int col = 0; col < m_aBrick[0].length; col ++ ){
					m_aBrick[row][col] = new BrickSprite(img,15,5);
					m_aBrick[row][col].setPosition(x, y);
					x = x + 15;
				}
				y = y + 5;
			}	
			//创建木棒
			Image imgBar = Image.createImage("/c10/Brick/bar.png");
			m_Bar = new BarSprite(imgBar,41,7);
			//创建小球
			Image imgBall = Image.createImage("/c10/Brick/ball.png");
			m_Ball = new BallSprite(imgBall,5,5);
		}
		catch (Exception ex){}
		setState(GAME_UI);
		Reset();								//设置砖块
		Start();								//启动线程
	}
	private void setState(int state){
		if(state < 0 || state >=GAME_STATE_NUM)
			return;
		m_nState = state;
	}
	private void Reset(){
		//随机设置所有砖块的种类
		for( int row = 0; row < m_aBrick.length; row ++ ){
			for( int col = 0; col < m_aBrick[0].length; col ++ ){
				m_aBrick[row][col].setState(BrickSprite.BRICK_FIX);
				int m = Math.abs(m_Random.nextInt() % 3);
				m_aBrick[row][col].setFrame(m);				
			}
		}	
		ResetBarBall();							//设置小球和木棒的初始位置
	}
	private void ResetBarBall(){				//设置小球和木棒的初始位置
		m_nBallNum --;
		if( m_nBallNum <= 0 ){
			setState(GAME_END);
			return;
		}
		m_Bar.setLong(false);					//设置木棒的状态
		m_Bar.setRefPixelPosition(getWidth()/2, getHeight() - 30);
		m_Ball.setSpeed(-3, -3);				//设置小球速度
		int y = m_Bar.getRefPixelY() 
			- m_Bar.getHeight()/2 - m_Ball.getWidth()/2 - 2;
		m_Ball.setRefPixelPosition(m_Bar.getRefPixelX() - 5, y);
		m_Ball.setVisible(true);
	}
	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 > 50 ){			    	//间隔50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:							//进入用户界面
			m_UI.Input( keyStates );
			if( m_UI.getState() == MyUI.UI_HIDE )
				setState(GAME_GAMING);
			break;			
		case GAME_GAMING:						//进入游戏
			m_Bar.Input(keyStates, getWidth());
			break;
		}
	}
	public void Logic(){
		switch( m_nState ){
		case GAME_UI:							//进入用户界面
			break;			
		case GAME_GAMING:						//进入游戏
			m_Bar.Logic();
			m_Ball.Logic(getWidth(), getHeight());
			boolean bReset = true;
			for( int row = 0; row < m_aBrick.length; row ++ ){
				for( int col = 0; col < m_aBrick[0].length; col ++ ){
					m_aBrick[row][col].Logic(getHeight());
					if( m_aBrick[row][col].getState() != BrickSprite.BRICK_HIDE )
						bReset = false;
				}
			}
			if( bReset ){
				//如果所有砖块都消失,则重新开始
				Reset();
				return;
			}
			Collides();							//碰撞检测
			if( m_Ball.isVisible() == false )	//如果小球消失,则重新再来
				ResetBarBall();
		}
	}
	public void Collides(){					//碰撞检测
		//如果小球和木棒发生碰撞
		if( m_Ball.collidesWith( m_Bar, false ) )
			m_Ball.Reflect(false);
		
		for( int row = 0; row < m_aBrick.length; row ++ ){
			for( int col = 0; col < m_aBrick[0].length; col ++ ){
				if( m_aBrick[row][col].getState() == BrickSprite.BRICK_FIX ){
					if( m_aBrick[row][col].collidesWith(m_Ball,false) )
					{//检测小球与砖块的碰撞
						int bx = m_Ball.getRefPixelX();
						int x1 = m_aBrick[row][col].getX();
						int x2 = m_aBrick[row][col].getX() + 
									m_aBrick[row][col].getWidth();
						if( bx > x1 && bx < x2 )
							m_Ball.Reflect(false);
						else
							m_Ball.Reflect(true);
						//随机设置砖块下落
						int r = m_Random.nextInt() % 3;
						if( r == 0 )
							m_aBrick[row][col].setState(BrickSprite.BRICK_DROP);
						else
							m_aBrick[row][col].setState(BrickSprite.BRICK_HIDE);
						int n = m_Record.getCurRecord();
						n += 5;
						m_Record.setCurRecord(n);
					}
				}
				else if( m_aBrick[row][col].getState() == BrickSprite.BRICK_DROP ){
					if( m_aBrick[row][col].collidesWith(m_Bar,false) )
					{//检测下落的砖块与木棒的碰撞
						switch( m_aBrick[row][col].getFrame() )
						{//不同的砖块,不同功能
						case 0:
							m_Bar.setLong(true);
							break;
						case 1:
							m_Ball.AddSpeed(2, 2);
							break;
						case 2:
							m_Ball.AddSpeed(-2, -2);
							break;
						}
						m_aBrick[row][col].setState(BrickSprite.BRICK_HIDE);
					}
				}
			}
		}	
	}
	public void Paint(){
		Graphics g = getGraphics();
		//用黑色清屏
		g.setColor(0);
		g.fillRect( 0, 0, getWidth(), getHeight() );
		
		g.setColor(0xFFFFFFFF);
		switch( m_nState ){
		case GAME_UI:					//显示界面
			m_UI.Paint(g, getWidth(), getHeight());
			break;			
		case GAME_GAMING:				//显示游戏画面
			m_Back.Paint(g, getWidth(), getHeight());
			for( int row = 0; row < m_aBrick.length; row ++ ){
				for( int col = 0; col < m_aBrick[0].length; col ++ ){
					m_aBrick[row][col].paint(g);
				}
			}		
			m_Ball.paint(g);
			m_Bar.paint(g);
			StringBuffer buffer = new StringBuffer();
			buffer.append("Score:");
			buffer.append(m_Record.getCurRecord());
			g.drawString(buffer.toString(), 10, 10, 0 );
			break;
		case GAME_END:					//显示结束语
			m_Back.Paint(g, getWidth(), getHeight());
			m_Record.Paint( g, getWidth(), getHeight() );
			break;
		}
		flushGraphics();
	}
}