1 package org.crazyit.event;  2 import java.util.Random;  3 import java.util.Timer;  4 import java.util.Timer;  5 import java.util.TimerTask;  6   7 import android.app.Activity;  8 import android.content.Context;  9 import android.graphics.Bitmap; 10 import android.graphics.BitmapFactory; 11 import android.graphics.Canvas; 12 import android.os.Bundle; 13 import android.os.Handler; 14 import android.os.Message; 15 import android.view.View; 16  17 import java.util.TimerTask; 18 import android.content.Context; 19 import android.graphics.Bitmap; 20 import android.graphics.BitmapFactory; 21 import android.graphics.Canvas; 22 import android.graphics.Paint; 23 import android.util.AttributeSet; 24 import android.view.View; 25 import android.app.Activity; 26 import android.content.Context; 27 import android.graphics.Bitmap; 28 import android.graphics.BitmapFactory; 29 import android.graphics.Canvas; 30 import android.graphics.Color; 31 import android.graphics.Paint; 32 import android.os.Bundle; 33 import android.os.Handler; 34 import android.os.Message; 35 import android.view.Display; 36 import android.view.KeyEvent; 37 import android.view.View; 38 import android.view.View.OnKeyListener; 39 import android.view.Window; 40 import android.view.WindowManager; 41 public class plane extends Activity{ 42     Bitmap plane; 43     Bitmap plane1; 44     private int back_height=1700; 45     private int width = 320; 46     private int height = 480; 47     Bitmap back; 48     int starty = back_height-height; 49     // 桌面的宽度 50     private int tableWidth; 51     // 桌面的高度 52     private int tableHeight; 53     // 飞机的坐标 54     public float currentX; 55     public float currentY; 56     // 敌机小球纵向的运行速度 57     private int ySpeed = 10; 58     Random rand = new Random(); 59     // 返回一个-0.5~0.5的比率，用于控制小球的运行方向。 60     private double xyRate = rand.nextDouble() - 0.5; 61     // 小球横向的运行速度 62     private int xSpeed = (int) (ySpeed * xyRate * 2); 63     // ballX和ballY代表小球的座标 64     private int ballX = rand.nextInt(200) + 20; 65     private int ballY = rand.nextInt(10) + 20; 66     // 游戏是否结束的旗标 67     private boolean isLose = false; 68  69     @Override 70     public void onCreate(Bundle savedInstanceState) 71     { 72         super.onCreate(savedInstanceState); 73         // 去掉窗口标题 74         requestWindowFeature(Window.FEATURE_NO_TITLE); 75         // 全屏显示 76         getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 77             WindowManager.LayoutParams.FLAG_FULLSCREEN); 78         // 创建PlaneView组件 79         final GameView gameView = new GameView(this); 80         setContentView(gameView); 81         // 获取窗口管理器 82         WindowManager windowManager = getWindowManager(); 83         Display display = windowManager.getDefaultDisplay(); 84          85         // 获得屏幕宽和高 86         tableWidth = display.getWidth(); 87         tableHeight = display.getHeight(); 88         currentX = tableWidth/2; 89         currentY = tableHeight-40; 90          91             // TODO Auto-generated constructor stub 92             //定义飞机图片 93          94                  95         final Handler handler = new Handler() 96         { 97             public void handleMessage(Message msg) 98             { 99                 if (msg.what == 0x123)100                 {101                     gameView.invalidate();102                     if (starty <= 0)103                     {104                         starty = back_height-height;105                     }106                     else107                     {108                         starty -= 10;109                     }110                     111                 }112             }113         };114 115         gameView.setOnKeyListener(new OnKeyListener()116         {117             @Override118             public boolean onKey(View source, int keyCode, KeyEvent event)119             {120                 // 获取由哪个键触发的事件121                 switch (event.getKeyCode())122                 {123                     // 控制挡板左移124                     case KeyEvent.KEYCODE_DPAD_LEFT:125                         if (currentX > 0)126                             currentX -= 10;127                         break;128                     // 控制挡板右移129                     case KeyEvent.KEYCODE_DPAD_RIGHT:130                         if (currentX < tableWidth)131                             currentX += 10;132                         break;133                     case KeyEvent.KEYCODE_DPAD_DOWN:134                         if(currentY
      
       0)139                             currentY-=10;140                         break;141                 }142                 // 通知planeView组件重绘143                 gameView.invalidate();144                 return true;145             }146         });147         final Timer timer = new Timer();148         timer.schedule(new TimerTask()149         {150 151             @Override152             public void run()153             {154                 // 如果小球碰到左边边框155                 if (ballX <= 0 || ballX >= tableWidth)156                 {157                     xSpeed = -xSpeed;158                 }159                 // 如果小球高度超出了球拍位置，且横向不在球拍范围之内，游戏结束。160                 if (ballY >= tableHeight||(ballY == currentY && ballX ==currentX))161                 {162                     timer.cancel();163                     // 设置游戏是否结束的旗标为true。164                     isLose = true;165                 }166                 // 小球座标增加167                 ballY += ySpeed;168                 ballX += xSpeed;169                 // 发送消息，通知系统重绘组件170                 handler.sendEmptyMessage(0x123);171             }172         }, 0, 100);173     }174 175     class GameView extends View176     {177         public GameView(Context context)178         {179             super(context);180             setFocusable(true);181             plane = BitmapFactory.decodeResource(context.getResources()182                     , R.drawable.plane);183                 setFocusable(true);184                 plane1 = BitmapFactory.decodeResource(context.getResources()185                         , R.drawable.plane1);186                     setFocusable(true);187             back =BitmapFactory.decodeResource(context.getResources()188                     , R.drawable.back_img);189             setFocusable(true);190                     191         }192         193 194         // 重写View的onDraw方法，实现绘画195         public void onDraw(Canvas canvas)196         {197             Paint paint = new Paint();198             199             // 如果游戏已经结束200             if (isLose)201             {202                 paint.setColor(Color.RED);203                 paint.setTextSize(40);204                 canvas.drawText("游戏已结束", 50, 200, paint);205             }206             // 如果游戏还未结束207             else208             {209                 // 设置颜色，并绘制小球210                 Bitmap back2 = Bitmap.createBitmap(back, 0, starty211                         , width , height);212                 canvas.drawBitmap(back2, 0, 0, paint);213                 canvas.drawBitmap(plane1 , ballX , ballY , paint);    214                 canvas.drawBitmap(plane , currentX , currentY , paint);    215             }216         }217     }218 219 220 }