【转】小游戏
package com.ss.fml;import java.util.Random;import java.util.Timer;import java.util.TimerTask;import android.app.Activity;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.Display;import android.view.KeyEvent;import android.view.View;import android.view.View.OnKeyListener;import android.view.Window;import android.view.WindowManager;/*** Description:* site: <a href="http://www.crazyit.org">crazyit.org</a> * Copyright (C), 2001-2012, Yeeku.H.Lee* This program is protected by copyright laws.* Program Name:* Date:* @author Yeeku.H.Lee kongyeeku@163.com* @version 1.0*/public class PinBall extends Activity{ // 桌面的宽度 private int tableWidth; // 桌面的高度 private int tableHeight; // 球拍的垂直位置 private int racketY; // 下面定义球拍的高度和宽度 private final int RACKET_HEIGHT = 20; private final int RACKET_WIDTH = 70; // 小球的大小 private final int BALL_SIZE = 12; // 小球纵向的运行速度 private int ySpeed = 10; Random rand = new Random(); // 返回一个-0.5~0.5的比率，用于控制小球的运行方向。 private double xyRate = rand.nextDouble() - 0.5; // 小球横向的运行速度 private int xSpeed = (int) (ySpeed * xyRate * 2); // ballX和ballY代表小球的座标 private int ballX = rand.nextInt(200) + 20; private int ballY = rand.nextInt(10) + 20; // racketX代表球拍的水平位置 private int racketX = rand.nextInt(200); // 游戏是否结束的旗标 private boolean isLose = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 去掉窗口标题 requestWindowFeature(Window.FEATURE_NO_TITLE); // 全屏显示 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); // 创建PlaneView组件 final GameView gameView = new GameView(this); setContentView(gameView); // 获取窗口管理器 WindowManager windowManager = getWindowManager(); Display display = windowManager.getDefaultDisplay(); // 获得屏幕宽和高 tableWidth = display.getWidth(); tableHeight = display.getHeight(); racketY = tableHeight - 80; final Handler handler = new Handler() { public void handleMessage(Message msg) { if (msg.what == 0x123) { gameView.invalidate(); } } }; gameView.setOnKeyListener(new OnKeyListener() { @Override public boolean onKey(View source, int keyCode, KeyEvent event) { // 获取由哪个键触发的事件 switch (event.getKeyCode()) { // 控制挡板左移 case KeyEvent.KEYCODE_DPAD_LEFT: if (racketX > 0) racketX -= 10; break; // 控制挡板右移 case KeyEvent.KEYCODE_DPAD_RIGHT: if (racketX < tableWidth - RACKET_WIDTH) racketX += 10; break; } // 通知planeView组件重绘 gameView.invalidate(); return true; } }); final Timer timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { // 如果小球碰到左边边框 if (ballX <= 0 || ballX >= tableWidth - BALL_SIZE) { xSpeed = -xSpeed; } // 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。 if (ballY >= racketY - BALL_SIZE && (ballX < racketX || ballX > racketX + RACKET_WIDTH)) { timer.cancel(); // 设置游戏是否结束的旗标为true。 isLose = true; } // 如果小球位于球拍之内，且到达球拍位置，小球反弹 else if (ballY <= 0 || (ballY >= racketY - BALL_SIZE && ballX > racketX && ballX <= racketX + RACKET_WIDTH)) { ySpeed = -ySpeed; } // 小球座标增加 ballY += ySpeed; ballX += xSpeed; // 发送消息，通知系统重绘组件 handler.sendEmptyMessage(0x123); } }, 0, 100); } class GameView extends View { public GameView(Context context) { super(context); setFocusable(true); } // 重写View的onDraw方法，实现绘画 public void onDraw(Canvas canvas) { Paint paint = new Paint(); paint.setStyle(Paint.Style.FILL); // 如果游戏已经结束 if (isLose) { paint.setColor(Color.RED); paint.setTextSize(40); canvas.drawText("游戏已结束", 50, 200, paint); } // 如果游戏还未结束 else { // 设置颜色，并绘制小球 paint.setColor(Color.rgb(240, 240, 80)); canvas.drawCircle(ballX, ballY, BALL_SIZE, paint); // 设置颜色，并绘制球拍 paint.setColor(Color.rgb(80, 80, 200)); canvas.drawRect(racketX, racketY, racketX + RACKET_WIDTH, racketY + RACKET_HEIGHT, paint); } } }}
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