零打碎敲学Android(三)—俄罗斯，你为什么是方块的?

俄罗斯方块原本是前苏联(俄罗斯)科学家阿列克谢·帕基特诺夫（Алексей Леонидович Пажитнов）在1984年6月利用空闲时间所编写的游戏程序 ，据说游戏的作者最喜欢网球（Tennis）运动，于是，他把来源于希腊语的tetra（意为“四”）与其结合，造了“tetris”一词，之后开始提供授权给各个游戏公司。在那个时代，游戏机甚至于计算机的运算能力普遍较低（当时盛行传说中的640KB内存……），游戏堪称匮乏之极，因此简单易写的俄罗斯方块迅速普及， 造成各平台上软件大量发行的“恐怖”现象。

传说中Game Boy版的俄罗斯方块层在日本大卖424万套，是Game Boy史上卖得最好的游戏。海湾战争时，也是前线美军最常拿来消磨时间的游戏之一（如果鄙人没记错的话，GB是美军当时的标准装备之一|||，传说美军是一边玩着口袋妖怪，一边战胜了伊拉克～～～）。

俄罗斯方块的游戏规则：

* 俄罗斯方块是由下面这几种常见方块构成，全部为四点组成：
o 长条：一次最多消除四层
o 7（左右）：最多消除三层，或消除二层
o 田：消除一至二层
o S（左右）：最多二层，容易造成孔洞
o T：最多二层
o 部分游戏有单格方块，可以穿透固定的方块到达最下层空位。其他的改版中出现更多特别的造型。

游戏方式：

* 方块会从区域上方开始缓慢继续落下。
* 玩家可以做的操作有：以90度为单位旋转方块，以格子为单位左右移动方块，让方块加速落下。
* 方块移到区域最下方或是着地到其他方块上无法移动时，就会固定在该处，而新的方块出现在区域上方开始落下。
* 当区域中某一列横向格子全部由方块填满，则该列会消失并成为玩家的得分。同时删除的列数越多，得分指数上升。
* 当固定的方块堆到区域最上方而无法消除层数时，则游戏结束。

一般来说，游戏还会提示下一个要落下的方块，熟练的玩家会计算到下一个方块，评估现在要如何进行。由于游戏能不断进行下去，对商业用游戏不太理想，所以一般还会随着游戏的进行而加速提高难度，通常打到最后时，多眨一次眼就可能牺牲掉……

PS:另外补充一点，俄罗斯方块事实上是有知识产权的。最初的俄罗斯方块知识产权由前苏联外国贸易协会（ELORG）持有，在苏联over之后，由The Tetris Company继承，但由于“非法”使用者数量过大，事实上陷入了无法收取任何使用费的窘态中。自1990年代初期开始，全世界大量流行的小型游戏机，多半都有类似于俄罗斯方块的游戏，不过——9成9都不是授权产品。

闲话少说，既然是如此简单的东东，今天我们也用Java写两个俄罗斯方块好了。

示例源码下载地址： http://code.google.com/p/loon-simple/downloads/list

与往常一样，一个例子写两台平台的，首先是PC版的实现，源码如下：

package org.loon.game.test;
import java.awt.Graphics2D;
import java.awt.Image;
/**
 * 
 * Copyright 2008 - 2009
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loonframework
 * @author chenpeng
 * @email：[e-mail]
 * @version 0.1
 */
public class TetrisField {
	private Block stoneCurrent;
	private Block stoneNext;
	private int[][] stonePosition;
	private int[][] gameFieldStones;
	private int curLines = 0, curLevel = 1, curPoints = 0, row, col;
	private boolean gameOver = false;
	public TetrisField(int row, int col) {
		int i = 0;
		int j = 0;
		this.row = row;
		this.col = col;
		stonePosition = new int[4][2];
		gameFieldStones = new int[row][col];
		for (i = 0; i < row; i++) {
			for (j = 0; j < col; j++) {
				gameFieldStones[i][j] = 0;
			}
		}
	}
	public int getCol() {
		return col;
	}
	public int getRow() {
		return row;
	}
	public void createCurrentStone(int NextStoneID) {
		stoneCurrent = stoneNext;
		createNextStone(NextStoneID);
		stonePosition = stoneCurrent.getStartPosition();
		if (gameFieldStones[5][4] != 0) {
			gameOver = true;
		}
		setCurrentStonePosition(stonePosition);
	}
	public void createNextStone(int stoneID) {
		stoneNext = new Block(stoneID);
	}
	public void setCurrentStonePosition(int[][] StoneNewPosition) {
		int i;
		for (i = 0; i < 4; i++) {
			gameFieldStones[StoneNewPosition[i][0]][StoneNewPosition[i][1]] = stoneCurrent
					.getBlockID();
		}
	}
	public void setCurrentStonePosition(int[][] StoneNewPosition,
			int[][] StoneOldPosition) {
		int i;
		for (i = 0; i < 4; i++) {
			gameFieldStones[StoneOldPosition[i][0]][StoneOldPosition[i][1]] = 0;
		}
		for (i = 0; i < 4; i++) {
			gameFieldStones[StoneNewPosition[i][0]][StoneNewPosition[i][1]] = stoneCurrent
					.getBlockID();
		}
		stonePosition = StoneNewPosition;
	}
	public boolean incrementPositionY(boolean isThread) {
		int i;
		int[][] StoneNewPosition = new int[4][2];
		int canStart = 0;
		for (i = 0; i < 4; i++) {
			if (stonePosition[i][1] > 3) {
				canStart = 1;
			}
		}
		if (canStart == 1 || isThread) {
			for (i = 0; i < 4; i++) {
				StoneNewPosition[i][1] = stonePosition[i][1] + 1;
				StoneNewPosition[i][0] = stonePosition[i][0];
			}
			if (!hasCollision(StoneNewPosition)) {
				setCurrentStonePosition(StoneNewPosition, stonePosition);
				return true;
			} else {
				setCurrentStonePosition(stonePosition);
				return false;
			}
		}
		return false;
	}
	public void rightPositionX() {
		int i;
		int[][] StoneNewPosition = new int[4][2];
		int canStart = 0;
		for (i = 0; i < 4; i++) {
			if (stonePosition[i][1] > 3) {
				canStart = 1;
			}
		}
		if (canStart == 1) {
			for (i = 0; i < 4; i++) {
				StoneNewPosition[i][1] = stonePosition[i][1];
				StoneNewPosition[i][0] = stonePosition[i][0] + 1;
			}
			if (!hasCollision(StoneNewPosition)) {
				setCurrentStonePosition(StoneNewPosition, stonePosition);
			} else {
				setCurrentStonePosition(stonePosition);
			}
		}
	}
	public void leftPositionX() {
		int i;
		int[][] StoneNewPosition = new int[4][2];
		int canStart = 0;
		for (i = 0; i < 4; i++) {
			if (stonePosition[i][1] > 3) {
				canStart = 1;
			}
		}
		if (canStart == 1) {
			for (i = 0; i < 4; i++) {
				StoneNewPosition[i][1] = stonePosition[i][1];
				StoneNewPosition[i][0] = stonePosition[i][0] - 1;
			}
			if (!hasCollision(StoneNewPosition)) {
				setCurrentStonePosition(StoneNewPosition, stonePosition);
			} else {
				setCurrentStonePosition(stonePosition);
			}
		}
	}
	public void rotateStone() {
		int[][] StoneNewPosition = new int[4][2];
		StoneNewPosition = stoneCurrent.rotateStone(stonePosition);
		if (!hasCollision(StoneNewPosition)) {
			setCurrentStonePosition(StoneNewPosition, stonePosition);
		} else {
			stoneCurrent.noRoate();
			setCurrentStonePosition(stonePosition);
		}
	}
	public boolean hasCollision(int[][] StoneNewPosition) {
		int i;
		for (i = 0; i < 4; i++) {
			gameFieldStones[stonePosition[i][0]][stonePosition[i][1]] = 0;
		}
		for (i = 0; i < 4; i++) {
			if (StoneNewPosition[i][0] < 0) {
				return true;
			} else if (StoneNewPosition[i][0] == row) {
				return true;
			} else if (StoneNewPosition[i][1] == col) {
				return true;
			} else if (gameFieldStones[StoneNewPosition[i][0]][StoneNewPosition[i][1]] != 0) {
				return true;
			}
		}
		return false;
	}
	public boolean hasLines() {
		int i = 0;
		int j = 0;
		int[] lines = new int[4];
		int Quantity = 0;
		boolean isLine = false;
		for (i = 3; i < col; i++) {
			for (j = 0; j < row; j++) {
				isLine = true;
				if (gameFieldStones[j][i] == 0) {
					isLine = false;
					break;
				}
			}
			if (isLine == true) {
				lines[Quantity] = i;
				Quantity++;
			}
		}
		if (Quantity > 0) {
			int[][] TempGameField = new int[row][col];
			int sum = 0;
			curLines += Quantity;
			curLevel = Math.round(curLines / row) + 1;
			//最大等级为20
			if (curLevel > 20) {
				curLevel = 20;
			}
			curPoints += Math.pow((row * curLevel), Quantity);
			for (i = col - 1; i > 3; i--) {
				for (j = 0; j < row; j++) {
					isLine = true;
					if (gameFieldStones[j][i] == 0) {
						isLine = false;
						break;
					}
				}
				if (isLine == false) {
					for (j = 0; j < row; j++) {
						TempGameField[j][i + sum] = gameFieldStones[j][i];
					}
				} else {
					sum++;
				}
			}
			for (i = 0; i < 4; i++) {
				for (j = 0; j < row; j++) {
					TempGameField[j][i] = gameFieldStones[j][i];
				}
			}
			gameFieldStones = TempGameField;
			return true;
		} else {
			return false;
		}
	}
	public int[][] getStonePosition() {
		return gameFieldStones;
	}
	public void draw(Graphics2D g, Image[] stones) {
		int nextStone = getNextStone();
		switch (nextStone) {
		case 1:
			g.drawImage(stones[1], 240, 60, null);
			g.drawImage(stones[1], 260, 60, null);
			g.drawImage(stones[1], 240, 80, null);
			g.drawImage(stones[1], 260, 80, null);
			break;
		case 2:
			g.drawImage(stones[2], 220, 70, null);
			g.drawImage(stones[2], 240, 70, null);
			g.drawImage(stones[2], 260, 70, null);
			g.drawImage(stones[2], 280, 70, null);
			break;
		case 3:
			g.drawImage(stones[3], 250, 60, null);
			g.drawImage(stones[3], 230, 80, null);
			g.drawImage(stones[3], 250, 80, null);
			g.drawImage(stones[3], 270, 80, null);
			break;
		case 4:
			g.drawImage(stones[4], 270, 60, null);
			g.drawImage(stones[4], 230, 80, null);
			g.drawImage(stones[4], 250, 80, null);
			g.drawImage(stones[4], 270, 80, null);
			break;
		case 5:
			g.drawImage(stones[5], 230, 60, null);
			g.drawImage(stones[5], 230, 80, null);
			g.drawImage(stones[5], 250, 80, null);
			g.drawImage(stones[5], 270, 80, null);
			break;
		case 6:
			g.drawImage(stones[6], 230, 60, null);
			g.drawImage(stones[6], 250, 60, null);
			g.drawImage(stones[6], 250, 80, null);
			g.drawImage(stones[6], 270, 80, null);
			break;
		case 7:
			g.drawImage(stones[7], 250, 60, null);
			g.drawImage(stones[7], 270, 60, null);
			g.drawImage(stones[7], 230, 80, null);
			g.drawImage(stones[7], 250, 80, null);
			break;
		}
	}
	public int getNextStone() {
		if (stoneNext == null) {
			stoneNext = new Block((int) Math.round(Math.random() * 6) + 1);
		}
		return stoneNext.getBlockID();
	}
	public int getLines() {
		return curLines;
	}
	public int getLevel() {
		return curLevel;
	}
	public int getPoints() {
		return curPoints;
	}
	public boolean isGameOver() {
		return gameOver;
	}
	class Block {
		private int blockID;
		private int[][] startPosition = new int[4][2];
		private int rotatePosition = 0;
		public Block(int blockID) {
			setBlockID(blockID);
			createStone();
		}
		private void createStone() {
			switch (blockID) {
			case 1:
				startPosition[0][0] = 4;
				startPosition[0][1] = 2;
				startPosition[1][0] = 5;
				startPosition[1][1] = 2;
				startPosition[2][0] = 4;
				startPosition[2][1] = 3;
				startPosition[3][0] = 5;
				startPosition[3][1] = 3;
				break;
			case 2:
				startPosition[0][0] = 5;
				startPosition[0][1] = 0;
				startPosition[1][0] = 5;
				startPosition[1][1] = 1;
				startPosition[2][0] = 5;
				startPosition[2][1] = 2;
				startPosition[3][0] = 5;
				startPosition[3][1] = 3;
				break;
			case 3:
				startPosition[0][0] = 5;
				startPosition[0][1] = 2;
				startPosition[1][0] = 4;
				startPosition[1][1] = 3;
				startPosition[2][0] = 5;
				startPosition[2][1] = 3;
				startPosition[3][0] = 6;
				startPosition[3][1] = 3;
				break;
			case 4:
				startPosition[0][0] = 4;
				startPosition[0][1] = 1;
				startPosition[1][0] = 4;
				startPosition[1][1] = 2;
				startPosition[2][0] = 4;
				startPosition[2][1] = 3;
				startPosition[3][0] = 5;
				startPosition[3][1] = 3;
				break;
			case 5:
				startPosition[0][0] = 5;
				startPosition[0][1] = 1;
				startPosition[1][0] = 5;
				startPosition[1][1] = 2;
				startPosition[2][0] = 5;
				startPosition[2][1] = 3;
				startPosition[3][0] = 4;
				startPosition[3][1] = 3;
				break;
			case 6:
				startPosition[0][0] = 5;
				startPosition[0][1] = 1;
				startPosition[1][0] = 4;
				startPosition[1][1] = 2;
				startPosition[2][0] = 5;
				startPosition[2][1] = 2;
				startPosition[3][0] = 4;
				startPosition[3][1] = 3;
				break;
			case 7:
				startPosition[0][0] = 4;
				startPosition[0][1] = 1;
				startPosition[1][0] = 4;
				startPosition[1][1] = 2;
				startPosition[2][0] = 5;
				startPosition[2][1] = 2;
				startPosition[3][0] = 5;
				startPosition[3][1] = 3;
				break;
			}
		}
		public int[][] rotateStone(int[][] currentPosition) {
			int[][] newPosition = new int[4][2];
			int x, y;
			switch (blockID) {
			case 2:
				if (rotatePosition == 0) {
					x = currentPosition[3][0];
					y = currentPosition[3][1];
					newPosition[0][0] = x - 3;
					newPosition[0][1] = y;
					newPosition[1][0] = x - 2;
					newPosition[1][1] = y;
					newPosition[2][0] = x - 1;
					newPosition[2][1] = y;
					newPosition[3][0] = x;
					newPosition[3][1] = y;
					rotatePosition = 1;
				} else {
					x = currentPosition[3][0];
					y = currentPosition[3][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y - 3;
					newPosition[1][0] = x;
					newPosition[1][1] = y - 2;
					newPosition[2][0] = x;
					newPosition[2][1] = y - 1;
					newPosition[3][0] = x;
					newPosition[3][1] = y;
					rotatePosition = 0;
				}
				return newPosition;
			case 3:
				if (rotatePosition == 0) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y - 1;
					newPosition[1][0] = x;
					newPosition[1][1] = y + 1;
					newPosition[2][0] = x;
					newPosition[2][1] = y;
					newPosition[3][0] = x + 1;
					newPosition[3][1] = y;
					rotatePosition = 1;
				} else if (rotatePosition == 1) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y + 1;
					newPosition[1][0] = x - 1;
					newPosition[1][1] = y;
					newPosition[2][0] = x;
					newPosition[2][1] = y;
					newPosition[3][0] = x + 1;
					newPosition[3][1] = y;
					rotatePosition = 2;
				} else if (rotatePosition == 2) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y - 1;
					newPosition[1][0] = x - 1;
					newPosition[1][1] = y;
					newPosition[2][0] = x;
					newPosition[2][1] = y;
					newPosition[3][0] = x;
					newPosition[3][1] = y + 1;
					rotatePosition = 3;
				} else if (rotatePosition == 3) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x - 1;
					newPosition[0][1] = y;
					newPosition[1][0] = x + 1;
					newPosition[1][1] = y;
					newPosition[2][0] = x;
					newPosition[2][1] = y;
					newPosition[3][0] = x;
					newPosition[3][1] = y - 1;
					rotatePosition = 0;
				}
				return newPosition;
			case 4:
				if (rotatePosition == 0) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y;
					newPosition[1][0] = x + 1;
					newPosition[1][1] = y;
					newPosition[2][0] = x + 2;
					newPosition[2][1] = y;
					newPosition[3][0] = x + 2;
					newPosition[3][1] = y - 1;
					rotatePosition = 1;
				} else if (rotatePosition == 1) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x - 1;
					newPosition[0][1] = y - 2;
					newPosition[1][0] = x;
					newPosition[1][1] = y - 2;
					newPosition[2][0] = x;
					newPosition[2][1] = y - 1;
					newPosition[3][0] = x;
					newPosition[3][1] = y;
					rotatePosition = 2;
				} else if (rotatePosition == 2) {
					x = currentPosition[1][0];
					y = currentPosition[1][1];
					newPosition[0][0] = x - 2;
					newPosition[0][1] = y + 1;
					newPosition[1][0] = x - 2;
					newPosition[1][1] = y;
					newPosition[2][0] = x - 1;
					newPosition[2][1] = y;
					newPosition[3][0] = x;
					newPosition[3][1] = y;
					rotatePosition = 3;
				} else if (rotatePosition == 3) {
					x = currentPosition[1][0];
					y = currentPosition[1][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y;
					newPosition[1][0] = x;
					newPosition[1][1] = y + 1;
					newPosition[2][0] = x;
					newPosition[2][1] = y + 2;
					newPosition[3][0] = x + 1;
					newPosition[3][1] = y + 2;
					rotatePosition = 0;
				}
				return newPosition;
			case 5:
				if (rotatePosition == 0) {
					x = currentPosition[1][0];
					y = currentPosition[1][1];
					newPosition[0][0] = x - 2;
					newPosition[0][1] = y - 1;
					newPosition[1][0] = x - 1;
					newPosition[1][1] = y - 1;
					newPosition[2][0] = x;
					newPosition[2][1] = y - 1;
					newPosition[3][0] = x;
					newPosition[3][1] = y;
					rotatePosition = 1;
				} else if (rotatePosition == 1) {
					x = currentPosition[0][0];
					y = currentPosition[0][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y;
					newPosition[1][0] = x + 1;
					newPosition[1][1] = y;
					newPosition[2][0] = x;
					newPosition[2][1] = y + 1;
					newPosition[3][0] = x;
					newPosition[3][1] = y + 2;
					rotatePosition = 2;
				} else if (rotatePosition == 2) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y;
					newPosition[1][0] = x;
					newPosition[1][1] = y + 1;
					newPosition[2][0] = x + 1;
					newPosition[2][1] = y + 1;
					newPosition[3][0] = x + 2;
					newPosition[3][1] = y + 1;
					rotatePosition = 3;
				} else if (rotatePosition == 3) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y;
					newPosition[1][0] = x + 1;
					newPosition[1][1] = y;
					newPosition[2][0] = x + 1;
					newPosition[2][1] = y - 1;
					newPosition[3][0] = x + 1;
					newPosition[3][1] = y - 2;
					rotatePosition = 0;
				}
				return newPosition;
			case 6:
				if (rotatePosition == 0) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x - 1;
					newPosition[0][1] = y;
					newPosition[1][0] = x;
					newPosition[1][1] = y + 1;
					newPosition[2][0] = x;
					newPosition[2][1] = y;
					newPosition[3][0] = x + 1;
					newPosition[3][1] = y + 1;
					rotatePosition = 1;
				} else {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x;
					newPosition[0][1] = y - 1;
					newPosition[1][0] = x - 1;
					newPosition[1][1] = y;
					newPosition[2][0] = x;
					newPosition[2][1] = y;
					newPosition[3][0] = x - 1;
					newPosition[3][1] = y + 1;
					rotatePosition = 0;
				}
				return newPosition;
			case 7:
				if (rotatePosition == 0) {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x - 1;
					newPosition[0][1] = y - 1;
					newPosition[1][0] = x - 1;
					newPosition[1][1] = y;
					newPosition[2][0] = x;
					newPosition[2][1] = y;
					newPosition[3][0] = x;
					newPosition[3][1] = y + 1;
					rotatePosition = 1;
				} else {
					x = currentPosition[2][0];
					y = currentPosition[2][1];
					newPosition[0][0] = x + 1;
					newPosition[0][1] = y;
					newPosition[1][0] = x - 1;
					newPosition[1][1] = y + 1;
					newPosition[2][0] = x;
					newPosition[2][1] = y;
					newPosition[3][0] = x;
					newPosition[3][1] = y + 1;
					rotatePosition = 0;
				}
				return newPosition;
			default:
				return currentPosition;
			}
		}
		public void noRoate() {
			rotatePosition--;
			if (rotatePosition == -1) {
				rotatePosition = 3;
			}
		}
		public int[][] getStartPosition() {
			return startPosition;
		}
		public void setBlockID(int blockID) {
			this.blockID = blockID;
		}
		public int getBlockID() {
			return blockID;
		}
	}
}

package org.loon.game.test;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import org.loon.framework.game.simple.GameScene;
import org.loon.framework.game.simple.core.Deploy;
import org.loon.framework.game.simple.core.LTimer;
import org.loon.framework.game.simple.core.LTimerContext;
import org.loon.framework.game.simple.core.Screen;
import org.loon.framework.game.simple.utils.GraphicsUtils;
/**
 * Copyright 2008 - 2009
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loonframework
 * @author chenpeng
 * @email��[e-mail]
 * @version 0.1
 */
public class Main extends Screen {
	private int curLevel = 1, blockSize = 20;
	private boolean gameStart;
	private final static Color emptyColor = new Color(120, 120, 190, 90),
			gridColor = new Color(255, 255, 255, 25);
	private LTimer delay;
	private TetrisField gameField;
	private Image[] stones = new Image[8];
	private Image background, styleImage;
	public int positionX;
	public int positionY;
	public Main() {
		// 背景图
		background = GraphicsUtils.loadImage("images/background2.jpg");
		// 装饰图
		styleImage = GraphicsUtils.loadImage("images/metalayer.png");
		// 获得俄罗斯方块小图
		Image[] blocks = GraphicsUtils.getSplitImages("images/block.png",
				blockSize, blockSize);
		for (int i = 0; i < blocks.length; i++) {
			stones[i + 1] = blocks[i];
		}
		setBackground(background);
		delay = new LTimer(100);
	}
	public void initialize() {
		gameStart = true;
		// 默认游戏区域（网格）大小为横10,竖24
		gameField = new TetrisField(10, 24);
		gameField.createNextStone(((int) Math.round(Math.random() * 6) + 1));
		gameField.createCurrentStone(((int) Math.round(Math.random() * 6) + 1));
	}
	public void alter(LTimerContext timer) {
		// 自动计时
		if (delay.action(timer.getTimeSinceLastUpdate())) {
			// 已初始化并且非游戏失败
			if (gameStart && !gameField.isGameOver()) {
				if (!gameField.incrementPositionY(true)) {
					gameField.createCurrentStone(((int) Math.round(Math
							.random() * 6) + 1));
					if (gameField.hasLines()) {
						curLevel = gameField.getLevel();
					}
				}
				delay.setDelay(300 / curLevel);
			}
		}
	}
	/**
	 * 绘制游戏画面
	 */
	public void draw(Graphics2D g) {
		if (gameStart) {
			int x, y;
			// 默认游戏区域（网格）大小为横10,竖24
			int[][] arrayStones = gameField.getStonePosition();
			for (x = 0; x < gameField.getRow(); x++) {
				for (y = 0; y < gameField.getCol(); y++) {
					g.setColor(emptyColor);
					g.fillRect(x * blockSize, y * blockSize, blockSize, blockSize);
					g.setColor(gridColor);
					g.drawRect(x * blockSize, y * blockSize, blockSize, blockSize);
					if (arrayStones[x][y] != 0) {
						g.drawImage(stones[arrayStones[x][y]], x * blockSize, y * blockSize,
								null);
					}
				}
			}
			if (gameField.isGameOver()) {
				g.setColor(Color.white);
				g.drawString("GAME OVER", 120, 160);
				return;
			}
			g.drawImage(styleImage, 210, 30, null);
			// 绘制游戏方块
			gameField.draw(g, stones);
			g.setColor(Color.white);
			g.drawString("等级:" + Integer.toString(gameField.getLevel()), 240,
					220);
			g.drawString("消层:" + Integer.toString(gameField.getLines()), 240,
					260);
			g.drawString("得分:" + Integer.toString(gameField.getPoints()), 240,
					300);
		} else {
			g.setColor(Color.white);
			g.drawString("GAME START", 110, 160);
			g.drawString("请按下 [ENTER]", 105, 200);
		}
	}
	/**
	 * 点击鼠标
	 */
	public void leftClick(MouseEvent e) {
	}
	public void middleClick(MouseEvent e) {
	}
	public void rightClick(MouseEvent e) {
	}
	/**
	 * 点击键盘
	 */
	public void onKey(KeyEvent e) {
		int key = e.getKeyCode();
		if (gameStart) {
			// 转换方向
			if (key == KeyEvent.VK_UP) {
				gameField.rotateStone();
				// 向右
			} else if (key == KeyEvent.VK_RIGHT) {
				gameField.rightPositionX();
				// 向左
			} else if (key == KeyEvent.VK_LEFT) {
				gameField.leftPositionX();
				// 加速向下
			} else if (key == KeyEvent.VK_DOWN) {
				gameField.incrementPositionY(true);
				// 重启游戏
			} else if (key == KeyEvent.VK_ESCAPE) {
				if (gameField != null && gameField.isGameOver()) {
					initialize();
				}
			}
		} else {
			// 开始游戏
			if (key == KeyEvent.VK_ENTER) {
				initialize();
			}
		}
	}
	public void onKeyUp(KeyEvent e) {
	}
	public static void main(String[] args) {
		GameScene frame = new GameScene("俄罗斯方块", 320, 480);
		Deploy deploy = frame.getDeploy();
		deploy.setScreen(new Main());
		deploy.setShowFPS(true);
		deploy.setLogo(false);
		deploy.setFPS(100);
		deploy.mainLoop();
		frame.showFrame();
	}
}

然后，是Android版的(TetrisField部分除Image与Graphics2D外完全一致，故不再粘贴)：

package org.loon.framework.android.game;
import android.graphics.Color;
import android.view.KeyEvent;
import android.view.MotionEvent;
/**
 * 
 * Copyright 2008 - 2009
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loonframework
 * @author chenpeng
 * @email：[e-mail]
 * @version 0.1
 */
public class ScreenTest2 extends LAScreen {
	private int curLevel = 1, blockSize = 20;
	private boolean gameStart;
	private final static int emptyColor = Color.argb(90, 120, 120, 190),
			gridColor = Color.argb(25, 255, 255, 255);
	private LTimer delay;
	private TetrisField gameField;
	private LAImage[] stones = new LAImage[8];
	private LAImage background, styleImage;
	public int positionX;
	public int positionY;
	public ScreenTest2() {
		// 背景图
		background = getLAImage("background2.jpg");
		// 装饰图
		styleImage = getLAImage("metalayer.png");
		// 获得俄罗斯方块小图
		LAImage[] blocks = getSplitLAImages("block.png", blockSize,
				blockSize);
		for (int i = 0; i < blocks.length; i++) {
			stones[i + 1] = blocks[i];
		}
		delay = new LTimer(100);
	}
	public void initialize() {
		gameStart = true;
		// 默认游戏区域（网格）大小为横10,竖24
		gameField = new TetrisField(10, 24);
		gameField.createNextStone(((int) Math.round(Math.random() * 6) + 1));
		gameField.createCurrentStone(((int) Math.round(Math.random() * 6) + 1));
	}
	public void alter(LTimerContext timer) {
		// 自动计时
		if (delay.action(timer.getTimeSinceLastUpdate())) {
			// 已初始化并且非游戏失败
			if (gameStart && !gameField.isGameOver()) {
				if (!gameField.incrementPositionY(true)) {
					gameField.createCurrentStone(((int) Math.round(Math
							.random() * 6) + 1));
					if (gameField.hasLines()) {
						curLevel = gameField.getLevel();
					}
				}
				delay.setDelay(300 / curLevel);
			}
		}
	}
	/**
	 * 绘制拼图
	 */
	public void draw(LAGraphics g) {
		g.drawImage(background, 0, 0);
		if (gameStart) {
			int x, y;
			// 默认游戏区域（网格）大小为横10,竖24
			int[][] arrayStones = gameField.getStonePosition();
			for (x = 0; x < gameField.getRow(); x++) {
				for (y = 0; y < gameField.getCol(); y++) {
					g.setColor(emptyColor);
					g.fillRect(x * blockSize, y * blockSize, blockSize,
							blockSize);
					g.setColor(gridColor);
					g.drawRect(x * blockSize, y * blockSize, blockSize,
							blockSize);
					if (arrayStones[x][y] != 0) {
						g.setAlpha(1.0F);
						g.drawImage(stones[arrayStones[x][y]], x * blockSize, y
								* blockSize);
					}
				}
			}
			g.setAlpha(1.0F);
			if (gameField.isGameOver()) {
				g.setColor(Color.WHITE);
				g.drawString("GAME OVER", 120, 160);
				return;
			}
			g.drawImage(styleImage, 210, 30);
			// 绘制游戏方块
			gameField.draw(g, stones);
			g.setColor(Color.WHITE);
			g.drawString("等级:" + Integer.toString(gameField.getLevel()), 240,
					220);
			g.drawString("消层:" + Integer.toString(gameField.getLines()), 240,
					260);
			g.drawString("得分:" + Integer.toString(gameField.getPoints()), 240,
					300);
		} else {
			g.setColor(Color.WHITE);
			g.drawString("GAME START", 110, 160);
			g.drawString("请按下 [ENTER]", 105, 200);
		}
	}
	/**
	 * 点击触摸屏
	 */
	public boolean onTouchDown(MotionEvent e) {
		return false;
	}
	/**
	 * 点击按键
	 */
	public boolean onKeyDown(int keyCode, KeyEvent e) {
		int key = e.getKeyCode();
		if (gameStart) {
			// 转换方向
			if (key == KeyEvent.KEYCODE_DPAD_UP) {
				gameField.rotateStone();
				// 向右
			} else if (key == KeyEvent.KEYCODE_DPAD_RIGHT) {
				gameField.rightPositionX();
				// 向左
			} else if (key == KeyEvent.KEYCODE_DPAD_LEFT) {
				gameField.leftPositionX();
				// 加速向下
			} else if (key == KeyEvent.KEYCODE_DPAD_DOWN) {
				gameField.incrementPositionY(true);
				// 重启游戏
			} else if (key == KeyEvent.KEYCODE_ENTER) {
				if (gameField != null && gameField.isGameOver()) {
					initialize();
				}
			}
		} else {
			// 开始游戏
			if (key == KeyEvent.KEYCODE_ENTER) {
				initialize();
			}
		}
		return false;
	}
	public boolean onKeyUp(int keyCode, KeyEvent e) {
		return false;
	}
	public boolean onTouchMove(MotionEvent e) {
		return false;
	}
	public boolean onTouchUp(MotionEvent e) {
		return false;
	}
}

示例源码下载地址： http://code.google.com/p/loon-simple/downloads/list

与前面的实例一样，都是先在PC上通过LGame-Simple调好，而后做函数替换移植到Android，写PC版用了一个小时，移植过去5分钟不到，吼吼吼……