Android PlayGame

PushBox

这里介绍一款经典小游戏：PushBox，共分四部分介绍。在编写代码之前，应先设计游戏的框架，了解各个类之间的关系，游戏的流程，前期的准备是做出游戏的必备条件。

• 欢迎动画界面的设计与实现

当玩家运行游戏时，首先看到的是欢迎界面，欢迎界面是整个游戏的门面，良好的欢迎界面会增加玩家对游戏的视觉体验。下面将开始对欢迎动画界面的开发进行介绍。


[1].PushBoxActivity类框架的搭建

public class PushBoxActivity extends Activity{  //主类 
	WelcomeView welcomeView = null;//欢迎界面
	WelcomeViewGoThread welcomeViewGoThread = null;//欢迎界面中的移动线程
	MenuView menuView = null;
	MenuViewGoThread menuViewGoThread = null;//菜单界面中的移动线程
	GameView gameView = null;
	
	boolean isSound = true;//是否播放声音
	MediaPlayer pushBoxSound;//推箱子声音
	MediaPlayer backSound;//背景音乐
	MediaPlayer winSound;//胜利的音乐
	MediaPlayer startSound;//开始和菜单时的音乐
	
	int map1[][];
	int map2[][];//当前游戏的地图
	int selectMap = 0;//选中的地图
	
	MySprite mySprite;//精灵
	
	KeyThread kt;//键盘监听线程
	int action = 0;//键盘的状态,二进制表示 从左往右表示上下左右
	
	Handler myHandler = new Handler(){//用来更新UI线程中的控件
        public void handleMessage(Message msg) {
        	if(msg.what == 1){//收到WelcomeViewGoThread/Welcome发来的消息    有各个Thread发来msg
        		welcomeViewGoThread.setFlag(false);
        		if(welcomeView != null){
        			welcomeView = null;  
        		}
        		initAndToMenuView();
        	}
        	else if(msg.what == 2){//收到MenuView发来的消息
        		if(menuView != null){
        			menuView = null;  
        		}
        		initAndToGameView();
        	}   
        	else if(msg.what == 3){
        		if(gameView != null){
        			gameView = null;  
        		}
        		initAndToMenuView();
        	}   
        	else if(msg.what == 4){//收到GameView来的消息，进入下一关
    			if(selectMap+1<MapList.map1.length){
    				selectMap = selectMap+1;
    				initAndToGameView();
    			}
    			else {
    				selectMap = 0;
    				initAndToGameView();
    			}
        	}
        }
	}; 
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
		//全屏
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN ,  
		              WindowManager.LayoutParams.FLAG_FULLSCREEN);
		
        pushBoxSound = MediaPlayer.create(this, R.raw.sound2);//推箱子的声音
        winSound = MediaPlayer.create(this, R.raw.winsound);//胜利的声音
        backSound  = MediaPlayer.create(this, R.raw.sound1);//背景音乐
        backSound.setLooping(true); //设置循环
        startSound = MediaPlayer.create(this, R.raw.sound3);
        startSound.setLooping(true);
		initAndToWelcomeView();
    }
    
    public void initAndToWelcomeView(){
    	welcomeView = new WelcomeView(this);
        if(isSound){
        	startSound.start();
        }
    	this.setContentView(welcomeView);
    	welcomeViewGoThread = new WelcomeViewGoThread(this);
    	welcomeViewGoThread.start();
    }
    
    public void initAndToMenuView(){
    	menuView = new MenuView(this);
    	this.setContentView(menuView);
    	menuViewGoThread = new MenuViewGoThread(this);
    	menuViewGoThread.start();
    }
    
    public void initAndToGameView(){
		map1 = new int[MapList.map1[selectMap].length][MapList.map1[selectMap][0].length];
		for(int i=0; i<MapList.map1[selectMap].length; i++){
			for(int j=0; j<MapList.map1[selectMap][i].length; j++){
				map1[i][j] = MapList.map1[selectMap][i][j];//初始化第一层
			}
		}
		map2 = new int[MapList.map2[selectMap].length][MapList.map2[selectMap][0].length];
		for(int i=0; i<MapList.map2[selectMap].length; i++){
			for(int j=0; j<MapList.map2[selectMap][i].length; j++){
				map2[i][j] = MapList.map2[selectMap][i][j];//初始化第二层
			}
		}    	
    	gameView = new GameView(this);
    	mySprite = new MySprite(this);
        kt = new KeyThread(this);//添加键盘监听
        kt.start();
		if(isSound){
			backSound.start();//播放声音
		}
    	this.setContentView(gameView);
    }
    
	public boolean onKeyUp(int keyCode, KeyEvent event) {//键盘抬起
    	if(keyCode == 19){//上
    		action = action & 0x37;
    	}
    	if(keyCode == 20){//下
    		action = action & 0x3B;
    	}    	
    	if(keyCode == 21){//左
    		action = action & 0x3D;
    	}    	
    	if(keyCode == 22){//右
    		action = action & 0x3E;
    	}
		return false;
	}
    
    public boolean onKeyDown(int keyCode, KeyEvent event){//键盘按下监听
    	if(keyCode == 19){//上
    		action = action | 0x08;
    	}
    	if(keyCode == 20){//下
    		action = action | 0x04;
    	}    	
    	if(keyCode == 21){//左
    		action = action | 0x02;
    	}    	
    	if(keyCode == 22){//右
    		action = action | 0x01;
    	}
		return false;
    }	
}

PushBoxActivity作为各个部分之间跳转的桥梁，承担找纽带作用。

这个类中Handler方法起到接受各个类的消息，并作出相应的动作。

Handler myHandler = new Handler(){//用来更新UI线程中的控件
        public void handleMessage(Message msg) {
        	if(msg.what == 1){//收到WelcomeViewGoThread/Welcome发来的消息    有各个Thread发来msg
        		welcomeViewGoThread.setFlag(false);
        		if(welcomeView != null){
        			welcomeView = null;  
        		}
        		initAndToMenuView();
        	}
        	else if(msg.what == 2){//收到MenuView发来的消息
        		if(menuView != null){
        			menuView = null;  
        		}
        		initAndToGameView();
        	}   
        	else if(msg.what == 3){
        		if(gameView != null){
        			gameView = null;  
        		}
        		initAndToMenuView();
        	}   
        	else if(msg.what == 4){//收到GameView来的消息，进入下一关
    			if(selectMap+1<MapList.map1.length){
    				selectMap = selectMap+1;
    				initAndToGameView();
    			}
    			else {
    				selectMap = 0;
    				initAndToGameView();
    			}
        	}
        }
	}; 

当Welcome动作完成之后，相应的会发出一个Message，比如：       
if(msg.what == 1){//收到WelcomeViewGoThread/Welcome发来的消息    有各个Thread发来msg
        welcomeViewGoThread.setFlag(false);
        if(welcomeView != null){
        welcomeView = null; 
        }
        initAndToMenuView();
        }
受到这个消息后，进入初始化菜单的界面initAndToMenuView()。

[2].WelcomeView

public class WelcomeView extends SurfaceView implements SurfaceHolder.Callback, OnClickListener{
	PushBoxActivity pushBoxActivity;
	WelcomeViewDrawThread welcomeViewDrawThread = null;
	Bitmap bitmap;
	Bitmap wallLeft;//左面的墙
	Bitmap wallRight;//右面的墙
	Bitmap iron;//铁门
	Bitmap woodLeft;//左面的木门
	Bitmap woodRight;//右面的木门
	Bitmap background;
	Bitmap mountain;//背景的山
	
	int wallLeftX = 15;//墙的坐标
	int wallLeftY = 10;
	int wallRightX = 150;
	int wallRightY = 10;

	int ironX = 15;//铁门的坐标
	int ironY = 10;
	
	int woodLeftX = 15;//木门的坐标
	int woodLeftY = 10;
	int woodRightX = 150;
	int woodRightY = 10; 		
	public WelcomeView(PushBoxActivity pushBoxActivity) {//构造器
		super(pushBoxActivity);
		this.pushBoxActivity = pushBoxActivity;
		getHolder().addCallback(this);
		welcomeViewDrawThread = new WelcomeViewDrawThread(this,getHolder());
		wallRight = BitmapFactory.decodeResource(getResources(), R.drawable.wallright);
		wallLeft = BitmapFactory.decodeResource(getResources(), R.drawable.wallleft); 
		bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.image4);
		iron = BitmapFactory.decodeResource(getResources(), R.drawable.image2);
		woodLeft = BitmapFactory.decodeResource(getResources(), R.drawable.image33);
		woodRight = BitmapFactory.decodeResource(getResources(), R.drawable.image3);
		background = BitmapFactory.decodeResource(getResources(), R.drawable.background);//背景的水
		mountain = BitmapFactory.decodeResource(getResources(), R.drawable.mountain2);		
	}
	protected void onDraw(Canvas canvas) {
		canvas.drawColor(Color.WHITE);//背景白色
		canvas.drawBitmap(background, 0, 0, new Paint());//绘制背景
		canvas.drawBitmap(mountain, 0, 0, new Paint());//后面的山图片
		canvas.drawBitmap(wallLeft, wallLeftX, wallLeftY,new Paint());//墙的左面
		canvas.drawBitmap(wallRight, wallRightX, wallRightY,new Paint());//墙的右面
		canvas.drawBitmap(iron, ironX, ironY,new Paint());//铁门
		canvas.drawBitmap(woodLeft, woodLeftX, woodLeftY,new Paint());//木头门左面
		canvas.drawBitmap(woodRight, woodRightX, woodRightY,new Paint());//木头门右面
		canvas.drawBitmap(bitmap, 0, 0, new Paint());
		this.setOnClickListener(this);
	}	
	public void surfaceChanged(SurfaceHolder holder, int format, int width,
			int height) {
	}
	public void surfaceCreated(SurfaceHolder holder) {
		welcomeViewDrawThread.setFlag(true);
		welcomeViewDrawThread.start();//启动刷帧线程
	}
	public void surfaceDestroyed(SurfaceHolder holder) {
        boolean retry = true;
        welcomeViewDrawThread.setFlag(false);//停止刷帧线程
        while (retry) {
            try {
            	welcomeViewDrawThread.join();//等待刷帧线程结束
                retry = false;
            } 
            catch (InterruptedException e) {//不断地循环，直到等待的线程结束
            }
        }
	}
	public void onClick(View v) {
		pushBoxActivity.myHandler.sendEmptyMessage(1);
	}	
}

这个类主要对View初始化，