android中的贪吃蛇源码

package com.dc.app;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.content.DialogInterface;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.view.KeyEvent;import android.view.Menu;import android.view.MenuItem;import android.view.MotionEvent;import com.dc.view.SnakeView;public class SnakeActivity extends Activity {private static final String tag = "SnakeActivity";SnakeView view;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//DisplayMetrics dm = new DisplayMetrics();//this.getWindowManager().getDefaultDisplay().getMetrics(dm);//int screenWidth = dm.widthPixels;//int screenHeight = dm.heightPixels;//Log.w(tag, "screenWidth=" + screenWidth);//320//Log.w(tag, "screenHeight=" + screenHeight);//480view = new SnakeView(this);setContentView(view);}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {// TODO Auto-generated method stubview.onKeyDown(keyCode, event);return super.onKeyDown(keyCode, event);}@Overridepublic boolean onKeyUp(int keyCode, KeyEvent event) {// TODO Auto-generated method stubview.onKeyUp(keyCode, event);return super.onKeyUp(keyCode, event);}@Overridepublic boolean onTouchEvent(MotionEvent event) {// TODO Auto-generated method stubview.onTouchEvent(event);return super.onTouchEvent(event);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// TODO Auto-generated method stubmenu.add(0, Menu.FIRST+2, 0, "继续").setShortcut('3', 'c');//设置快捷键menu.add(0, Menu.FIRST, 0, "重新开始").setShortcut('1', 'p');//设置快捷键menu.add(0, Menu.FIRST+1, 0, "关于...").setShortcut('2', 'a');//设置快捷键return super.onCreateOptionsMenu(menu);}public boolean onPrepareOptionsMenu(Menu menu) {view.isPaused=true;//显示菜单时暂停游戏return super.onPrepareOptionsMenu(menu);}@Overridepublic void onOptionsMenuClosed(Menu menu) {// TODO Auto-generated method stubview.isPaused=false;//关闭菜单时继续游戏super.onOptionsMenuClosed(menu);}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// TODO Auto-generated method stubswitch (item.getItemId()) {case Menu.FIRST:if(view!=null){view.setFocusable(true);view.init();}break;case Menu.FIRST+1:Dialog aboutDialog=new AlertDialog.Builder(this).setTitle("贪吃蛇").setMessage("贪吃蛇V1.0").setCancelable(true).setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubdialog.cancel();}}).setNegativeButton("访问首页", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubdialog.cancel();Uri uri=Uri.parse("http://www.iteye.com");Intent intent=new Intent(Intent.ACTION_VIEW,uri);startActivity(intent);}}).create();aboutDialog.setCanceledOnTouchOutside(true);aboutDialog.show();break;case Menu.FIRST+2:view.isPaused=false;break;default:break;}return super.onOptionsItemSelected(item);}}

这里使用了继承了View作为“画布”，实际是个控件；最好继承SurfaceView。看情况啦！

package com.dc.view;import java.util.Random;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Paint.FontMetrics;import android.graphics.Paint.Style;import android.util.Log;import android.view.KeyEvent;import android.view.MotionEvent;import android.view.View;public class SnakeView extends View implements Runnable{private static final String tag="SnakeView";public boolean isPaused=false;public boolean isRunning=true;private int[][] snake=new int[100][2];//100节点总数，第二维下标0代表x坐标，1代表y坐标private int snakeNum;//已经使用的节点数private int direction;private final int direction_up=0;private final int direction_down=1;private final int direction_left=2;private final int direction_right=3;private int width=320,height=480;//view的宽高，不是全屏320*480private final int SNAKEWIDTH=5;//单节蛇体宽private int SLEEP_TIME;private int foodX,foodY;//食物坐标private boolean b=true;//控制食物闪烁private Random r;private Thread t;private Paint paint;public SnakeView(Context context) {super(context);// TODO Auto-generated constructor stubr=new Random();paint=new Paint();init();t=new Thread(this);t.start();}public void init(){snakeNum=12;for(int i=0;i<snakeNum;i++){snake[i][0]=100-SNAKEWIDTH*i;snake[i][1]=100;}direction=direction_right;generateFood();SLEEP_TIME=200;b=true;isRunning=true;isPaused=false;}@Overridepublic void run() {// TODO Auto-generated method stubwhile (isRunning) {long start=System.currentTimeMillis();if(!isPaused){if(isGameOver()){isPaused=true;}else{eatFood();move(direction);b=!b;}}postInvalidate();//相当于repaintlong end=System.currentTimeMillis();if(end-start<SLEEP_TIME){try {Thread.sleep(SLEEP_TIME-(end-start));} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}@Overrideprotected void onDraw(Canvas canvas) {// TODO Auto-generated method stubsuper.onDraw(canvas);width=getWidth();height=getHeight();Log.w(tag, "width="+width);Log.w(tag, "height="+height);width=canvas.getWidth();height=canvas.getHeight();Log.w(tag, "width=="+width);Log.w(tag, "height=="+height);canvas.drawColor(0xffffff);paint.setColor(Color.BLUE);paint.setAntiAlias(true);paint.setStyle(Style.FILL);for(int i=0;i<snakeNum;i++){canvas.drawRect(snake[i][0], snake[i][1], snake[i][0]+SNAKEWIDTH, snake[i][1]+SNAKEWIDTH, paint);}paint.setColor(Color.WHITE);if(b){canvas.drawRect(foodX,foodY,foodX+SNAKEWIDTH,foodY+SNAKEWIDTH,paint);}}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {// TODO Auto-generated method stubswitch (keyCode) {case KeyEvent.KEYCODE_DPAD_DOWN:if(direction!=direction_up)direction=direction_down;break;case KeyEvent.KEYCODE_DPAD_UP:if(direction!=direction_down)direction=direction_up;break;case KeyEvent.KEYCODE_DPAD_LEFT:if(direction!=direction_right)direction=direction_left;break;case KeyEvent.KEYCODE_DPAD_RIGHT:if(direction!=direction_left)direction=direction_right;break;case KeyEvent.KEYCODE_DPAD_CENTER:isPaused=!isPaused;break;default:break;}return super.onKeyDown(keyCode, event);}@Overridepublic boolean onKeyUp(int keyCode, KeyEvent event) {// TODO Auto-generated method stubreturn super.onKeyUp(keyCode, event);}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {// TODO Auto-generated method stubsuper.onSizeChanged(w, h, oldw, oldh);}@Overridepublic boolean onTouchEvent(MotionEvent event) {// TODO Auto-generated method stubswitch (event.getAction()) {case MotionEvent.ACTION_DOWN:break;case MotionEvent.ACTION_MOVE:break;case MotionEvent.ACTION_UP:break;}return super.onTouchEvent(event);}private void eatFood(){if(snake[0][0]==foodX&&snake[0][1]==foodY){snakeNum++;generateFood();}}private void generateFood(){while(true){//确保在屏幕内产生食物foodX=Math.abs(r.nextInt()%(width-SNAKEWIDTH+1))/SNAKEWIDTH*SNAKEWIDTH;foodY=Math.abs(r.nextInt()%(height-SNAKEWIDTH+1))/SNAKEWIDTH*SNAKEWIDTH;boolean b=true;for(int i=0;i<snakeNum;i++){//确保不在蛇体上产生食物if(foodX==snake[i][0]&&foodY==snake[i][1]){b=false;break;}}if(b){break;}}}private void move(int direction){for(int i=snakeNum-1;i>0;i--){snake[i][0]=snake[i-1][0];snake[i][1]=snake[i-1][1];}switch (direction) {case direction_up:snake[0][1]=snake[0][1]-SNAKEWIDTH;break;case direction_down:snake[0][1]=snake[0][1]+SNAKEWIDTH;break;case direction_left:snake[0][0]=snake[0][0]-SNAKEWIDTH;break;case direction_right:snake[0][0]=snake[0][0]+SNAKEWIDTH;break;default:break;}}private boolean isGameOver(){//越界判断if(snake[0][0]<0||snake[0][0]>width-SNAKEWIDTH||snake[0][1]<0||snake[0][1]>height-SNAKEWIDTH){return true;}for(int i=4;i<snakeNum;i++){//自身碰撞判断if(snake[0][0]==snake[i][0]&&snake[0][1]==snake[i][1]){return true;}}return false;}}

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