简单的J2ME游戏--小蜜蜂

/** * <p>Title: DemoRacer</p> * <p>Description: Game API Demo for Symbian MIDP 2.0 Book.</p> * <p>Copyright: Copyright (c) 2003</p> * <p>Company: Symbian Ltd</p> * @author Alan Newman - alan@sensibledevelopment.net * @version 1.0 */ import javax.microedition.lcdui.game.*; import javax.microedition.lcdui.*; import java.util.Vector; import java.io.IOException; public class VaderManager extends LayerManager { private BackGround backGround; private Alien alien; private Player player; private Barrier barrier; private Image imgBarrier; private int xWindow; private int yWindow; private static VaderCanvas gameCanvas; private int currentLayer; private int layers; protected Vector vtrAliens; protected Vector vtrBullets; protected Vector vtrBarriers; Font font; int fHeight=0; private final String STR_OK="OK"; private String strLevelOver1="Level Over"; private boolean isLevelOver=false; private String strScore="Score: "; private int intScore=0; public String strDebug=""; public VaderManager(VaderCanvas gameCanvas) { font=Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_MEDIUM); fHeight=font.getHeight(); this.gameCanvas=gameCanvas; vtrAliens = new Vector(); vtrBullets = new Vector(); vtrBarriers = new Vector(); Alien.setLayerManager(this); Bullet.setLayerManager(this); Player.setLayerManager(this); Barrier.setLayerManager(this); backGround=createBackground(); player=createPlayerSprite(); initBarriers(); append(player); initAliens(); append(backGround); } public static VaderCanvas getGameCanvas() {return gameCanvas;} public Player getPlayer() {return player;} public Vector getBarriers() {return vtrBarriers;} public void setScore(int s) {intScore=s;} public int getScore() {return intScore;} public boolean getLevelOver() {return isLevelOver;} public void setLevelOver(boolean isOver) { isLevelOver=isOver; gameCanvas.setRunning(false); } public void reDrawDisplay(int yOffset) { getPlayer().setY(yOffset); int bCount=vtrBarriers.size(); Barrier barrier; for (int b=0;b<bCount;b++) { barrier=(Barrier)vtrBarriers.elementAt(b); //barrier.setY(yOffset); barrier.move(0,yOffset); } int aCount=vtrAliens.size(); Alien alien; for (int a=0;a<aCount;a++) { alien=(Alien)vtrAliens.elementAt(a); alien.setY((int)yOffset/2); } int blCount=vtrBullets.size(); Bullet bullet; for (int bl=0;bl<blCount;bl++) { bullet=(Bullet)vtrBullets.elementAt(bl); bullet.setY(yOffset); } remove(backGround); backGround=createBackground(); append(backGround); } public void removeLayer(Layer layer) { if(layer.getClass().getName().equals("Alien")) { vtrAliens.removeElement(layer); } else if(layer.getClass().getName().equals("Bullet")) { vtrBullets.removeElement(layer); } layers--; currentLayer--; remove(layer); } public void tick() { // return the number of layers in the LayerManager. if(vtrAliens.size()==0) { setLevelOver(true); } layers=getSize(); // create a reference to the Alien and Bullet objects Alien alien; Bullet bullet; // cycle through the layers until we find the ones // we are interested in. for (currentLayer=0;currentLayer<layers;currentLayer++) { Layer layer=getLayerAt(currentLayer); if(layer.getClass().getName().equals("Alien")) { alien=(Alien)layer; alien.tick(); } else if(layer.getClass().getName().equals("Bullet")) { bullet=(Bullet)layer; bullet.tick(); } } // TO DO detect collision with Barrier object } private void initAliens() { int r=0; int c=0; int rows=0; int cols=0; int xPos=0; int yPos=0; int height = 0; int width = 0; int spaceHeight=0; int spaceWidth=0; int fHeight=font.getHeight(); Alien alien_; Image image = null; try { image = Image.createImage("/alien.png"); width = image.getWidth() / Alien.RAW_FRAMES; height = image.getHeight(); spaceHeight=(int)(gameCanvas.getCanvasHeight()-((Barrier)vtrBarriers.elementAt(0)).getX()-(font.getHeight()*2))/2; spaceWidth=gameCanvas.getWidth(); rows=(int)(spaceHeight/height); cols=(int)((spaceWidth*3/4)/width); Alien.setRows(rows); Alien.setCols(cols); } catch (IOException io) { io.printStackTrace(); } for (int i=0;i<rows*cols; i++) { c = i % cols; r = (i - c) / cols; xPos=(width+Alien.colOffset)*c; yPos=(fHeight*2)+(height+Alien.rowOffset)*r; alien_=createAlienSprite(image, width, height, xPos, yPos); append(alien_); vtrAliens.addElement(alien_); } } // midp 1.0 implementation+Sprite private void initBarriers() { int col; int xPos=0; int yPos=0; int iWidth=1; int iHeight=1; Barrier barrier; int tileWidth=0; int tileHeight=0; // assuming two barriers per screen plus two barrier space in between // therefore what is a 1/4 of the screen - dependent upon the barrier image dimensions. for (col = 0; col < Barrier.getCols(); col++) { barrier=createBarrierSprite(); xPos=(int)((barrier.getWidth()/2)+(barrier.getWidth()*(col*2))); yPos=getPlayer().getY()-barrier.getHeight(); barrier.setPosition(xPos, yPos); append(barrier); vtrBarriers.addElement(barrier); } } public void initBullets() { Bullet bullet=createBulletSprite(); insert(bullet,0); vtrBullets.addElement(bullet); } public void paint(Graphics g) { g.setFont(font); paint(g, 0, 0); g.setColor(255,255,0); g.drawString(strScore+intScore+" Fps: "+gameCanvas.getAverageFrameRate(),gameCanvas.getWidth()/2, 0, g.TOP|g.HCENTER); g.drawString("Avg Kb:"+gameCanvas.getAverageMemoryUsage()+"%, High: "+gameCanvas.getMemoryHigh()+", Low: "+gameCanvas.getMemoryLow(),gameCanvas.getWidth()/2, font.getHeight(), g.TOP|g.HCENTER); if(isLevelOver) { g.drawString(strLevelOver1,gameCanvas.getWidth()/2, gameCanvas.getHeight()*1/3, g.TOP|g.HCENTER); } } public void doGameAction(int gameAction) { Bullet bullet; if(gameAction==GameCanvas.LEFT) { player.left(); } else if(gameAction==GameCanvas.RIGHT) { player.right(); } else if(gameAction==GameCanvas.FIRE) { player.fire(); } } private BackGround createBackground() { Image image = null; int rows=0; int columns=0; int width=0; int height=0; try { image = Image.createImage("/background.png"); width=image.getWidth(); height=image.getHeight(); columns=(int)(gameCanvas.getWidth()/width)+1; rows=(int)(gameCanvas.getHeight()/height)+1; } catch (IOException io) { io.printStackTrace(); } return new BackGround(columns, rows, image, width, height); } private Barrier createBarrierSprite() { Image image=null; int height = 0; int width = 0; int xPos=0; int yPos=0; try { image = Image.createImage("/barrier.png"); width = image.getWidth()/Barrier.RAW_FRAMES; height = image.getHeight(); } catch (IOException io) { io.printStackT