安卓遊戲開發_基礎環境擷取代碼

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public class PinBall extends Activity{        private int tableHeight;    private int tableWidth;    Random random = new Random();        //擋板大小和座標    private final int racket_width = 70;    private final int racket_height = 20;    private int racketY;    private int racketX;        //球體大小,速度,座標    private final int ballR = 12;    private int ballX;    private int ballY;    private int Vy = 3;    //產生一個比率(-0.5~0.5之間),用於產生隨機方向    private double xyRate = random.nextDouble() - 0.5;    private int Vx = (int) (Vy * 2 * xyRate);         //遊戲進行時標誌    private boolean isLose = false;        @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        //全屏無標題        requestWindowFeature(Window.FEATURE_NO_TITLE);        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                 WindowManager.LayoutParams.FLAG_FULLSCREEN);        //設定遊戲介面        final GameView game = new  GameView(this);        setContentView(game);        //擷取案頭大小        WindowManager manager = getWindowManager();        Display display = manager.getDefaultDisplay();        tableHeight = display.getHeight();        tableWidth = display.getWidth();        //根據擷取的案頭大小初始化座標        initXY();                //重繪        final Handler handler = new Handler(){            public void handleMessage(Message message){                if(message.what == 0x123){                    game.invalidate();                }            }        };                final Timer timer = new Timer();        timer.schedule(new TimerTask() {                        @Override            public void run() {                //左右邊框                if(ballX < 0 || (ballX + ballR > tableWidth)){                    Vx = -Vx;                }                //超過下邊界且未被球拍接住                if((ballY + ballR > racketY) && (ballX + ballR < racketX || ballX > racketX + racket_width)){                    timer.cancel();                    isLose = true;                }                //被球拍打回或者反彈時到達頂部                if(ballY < 0 || (ballY + ballR > racketY && ballX > racketX && ballX < racketX + racket_width )){                    Vy = -Vy;                }                ballX += Vx;                ballY += Vy;                handler.sendEmptyMessage(0x123);            }        }, 0, 10);                //給遊戲view加監聽器        game.setOnTouchListener(new OnTouchListener() {                        @Override            public boolean onTouch(View v, MotionEvent event) {                int x = (int) event.getX();                int mid = tableWidth/2;                switch (x > mid ? 1 : 2) {                case 1:                    if(racketX + racket_width < tableWidth){                        racketX += 10;                        }                    break;                case 2:                    if(racketX > 0){                        racketX -= 10;                    }                    break;                }                game.invalidate();                return true;            }        });            }        private void initXY(){        racketY = tableHeight - 80;        racketX = random.nextInt(tableWidth);        ballX = random.nextInt(tableWidth);        ballY = random.nextInt(10) + 20;    }        class GameView extends View{        private static final float TEXT_SIZE = 40;        public GameView(Context context) {            super(context);            // TODO Auto-generated constructor stub            setFocusable(true);        }        @Override        protected void onDraw(Canvas canvas) {            Paint paint = new Paint();            paint.setStyle(Paint.Style.FILL);            //遊戲結束            if (isLose) {                paint.setTextSize(TEXT_SIZE);                paint.setColor(Color.RED);                canvas.drawText("Game Over!", tableWidth/2 - paint.getTextSize()*2, tableHeight/2 - paint.getTextSize()/2, paint);            }            //遊戲繼續            else {                paint.setColor(Color.BLUE);                canvas.drawCircle(ballX, ballY, ballR, paint);                paint.setColor(Color.GREEN);                canvas.drawRect(racketX, racketY, racketX + racket_width, racketY + racket_height, paint);                            }        }                    }}

 

安卓遊戲開發_基礎環境擷取代碼