本次教程跟之前隔了不少时间哈，有点忘记了的建议先看看前面的熟悉下，今天我准备把这个2048给结束了，拖了这么久。
按照惯例，我们已经把准备工作都做好了，今天这一部分信息量比较大，也是整个游戏的核心所在，所以我准备分功能来讲，最后大家结合源码来看就不会感觉太吃力了。
1、初始化游戏
初始化的时候，我们要干嘛呢，首先要看配置，配置了几行，然后先画好面板，然后要给在面板上随机生成2个数字Item，这涉及到2个方法，一个是初始化面板，一个是添加随机数字
private void initGameView(int cardSize) {
removeAllViews();
GameItem card;
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
card = new GameItem(getContext(), 0);
addView(card, cardSize, cardSize);
// 初始化GameMatrix全部为0 空格List为所有
gameMatrix[i][j] = card;
blanks.add(new Point(i, j));
}
}
// 添加随机数字
addRandomNum();
addRandomNum();
}private void addRandomNum() {
getBlanks();
if (blanks.size() > 0) {
int randomNum = (int) (Math.random() * blanks.size());
Point randomPoint = blanks.get(randomNum);
gameMatrix[randomPoint.x][randomPoint.y].setNum(Math.random() > 0.2d ? 2 : 4);
Game.getGameActivity().getAnimationLayer().animcreate(gameMatrix[randomPoint.x][randomPoint.y]);
}
}2、具体参数等初始化
这个比较简单了，直接上代码，大家应该都看得懂
private void initGameMatrix() {
// 初始化矩阵
removeAllViews();
scoreHistory = 0;
Config.Scroe = 0;
Config.GameLines = Config.sp.getInt(Config.KEY_GameLines, 4);
gameLines = Config.GameLines;
gameMatrix = new GameItem[gameLines][gameLines];
gameMatrixHistory = new int[gameLines][gameLines];
calList = new ArrayList<Integer>();
blanks = new ArrayList<Point>();
highScore = Config.sp.getInt(Config.KEY_HighScore, 0);
setColumnCount(gameLines);
setRowCount(gameLines);
setOnTouchListener(this);
// 初始化View参数
DisplayMetrics metrics = new DisplayMetrics();
WindowManager wm = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
display.getMetrics(metrics);
Config.ItemSize = metrics.widthPixels / Config.GameLines;
initGameView(Config.ItemSize);
}3、触摸事件
触摸的时候判断4个方向，这个基本也是通用的写法了，不多说了
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
saveHistoryMatrix();
startX = (int) event.getX();
startY = (int) event.getY();
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
endX = (int) event.getX();
endY = (int) event.getY();
judgeDirection(endX - startX, endY - startY);
if (isMoved()) {
addRandomNum();
// 修改显示分数
Game.getGameActivity().setScore(Config.Scroe, 0);
}
int result = checkCompleted();
if (result == 0) {
if (Config.Scroe > highScore) {
Editor editor = Config.sp.edit();
editor.putInt(Config.KEY_HighScore, Config.Scroe);
editor.commit();
}
Toast.makeText(getContext(), "lose", Toast.LENGTH_LONG).show();
Config.Scroe = 0;
} else if (result == 2) {
Toast.makeText(getContext(), "success", Toast.LENGTH_LONG).show();
Config.Scroe = 0;
}
break;
default:
break;
}
return true;
}其中判断偏移的方法private void judgeDirection(int offsetX, int offsetY) {
if (Math.abs(offsetX) > Math.abs(offsetY)) {
if (offsetX > 10) {
swipeRight();
} else {
swipeLeft();
}
} else {
if (offsetY > 10) {
swipeDown();
} else {
swipeUp();
}
}
}private void swipeLeft() {
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
int currentNum = gameMatrix[i][j].getNum();
if (currentNum != 0) {
if (keyItemNum == -1) {
keyItemNum = currentNum;
} else {
if (keyItemNum == currentNum) {
calList.add(keyItemNum * 2);
Config.Scroe += keyItemNum * 2;
keyItemNum = -1;
} else {
calList.add(keyItemNum);
keyItemNum = currentNum;
}
}
} else {
continue;
}
}
if (keyItemNum != -1) {
calList.add(keyItemNum);
}
// 改变Item值
for (int j = 0; j < calList.size(); j++) {
gameMatrix[i][j].setNum(calList.get(j));
}
for (int m = calList.size(); m < gameLines; m++) {
gameMatrix[i][m].setNum(0);
}
// 重置行参数
keyItemNum = -1;
calList.clear();
}
}代码很清晰，大家看看就知道了，关键是如何总结出这个算法。
4、下面就是判断游戏什么时候需要新加入一个数字Item
当当前的数字矩阵结构域上次的结构发生差别的时候，我们就要add一个新的数字Item了
private boolean isMoved() {
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
if (gameMatrixHistory[i][j] != gameMatrix[i][j].getNum()) {
return true;
}
}
}
return false;
}5、最后就是如何判断结束了
如果当前还有空格的Item，则必定没有结束，若相邻的数字都没有相同的数字，则必定结束，若出现配置的Goal，则赢了
private int checkCompleted() {
getBlanks();
if (blanks.size() == 0) {
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
if (j < gameLines - 1) {
if (gameMatrix[i][j].getNum() == gameMatrix[i][j + 1].getNum()) {
return 1;
}
}
if (i < gameLines - 1) {
if (gameMatrix[i][j].getNum() == gameMatrix[i + 1][j].getNum()) {
return 1;
}
}
}
}
return 0;
}
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
if (gameMatrix[i][j].getNum() == 2048) {
return 2;
}
}
}
return 1;
}下面放出一些最终的图片：
由于刚换了工作，上下班时间倍增，所以写代码的时间也少了，其实关于这个游戏我还有很多想法没做，这个版本的2048，比网上的版本，多了撤销上次移动功能，多了可以定制游戏维数的功能，多了配置目标值的功能，我这个版本的2048，配置要求极低，相比cocos2dx版本的来说，极大的降低了电量消耗，可配置性更强。这些都是我在玩的过程中，觉得不爽的地方，然后改进的，还有一些想法，目前还没有去做，平时工作去做android的framework了，应用层也就研究的少了，希望大家能改进我的代码，做出更好的2048。
1、添加debug功能，也称作弊后门，我原来是想，当手指滑动超过多少距离后，调用一个新方法，设置添加的随机数的位置和大小，这个用我现在的代码是很好实现的，只要把addRandom方法改下，写一个debugRandom方法就OK了
2、分享功能，这个用ShareSdk就可以了，玩游戏嘛，就是要大家一起玩才好玩，无社交不游戏
3、更换2、4、8、16……数字的背景，这个网上很多了，我们也可以自定义一套背景，这个实现也是比较简单的，只要把GameItem这个类里面的Item的背景添加一个set方法就ok了
以上，终了
以下，刷代码
package com.xys.game2048.view;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.content.SharedPreferences.Editor;
import android.graphics.Point;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.widget.GridLayout;
import android.widget.Toast;
import com.xys.game2048.activity.Game;
import com.xys.game2048.bean.GameItem;
import com.xys.game2048.config.Config;
public class GameView extends GridLayout implements OnTouchListener {
// GameView对应矩阵
private GameItem[][] gameMatrix;
// 空格List
private List<Point> blanks;
// 矩阵行列数
private int gameLines;
// 记录坐标
private int startX, startY, endX, endY;
// 辅助数组
private List<Integer> calList;
private int keyItemNum = -1;
// 历史记录数组
private int[][] gameMatrixHistory;
// 历史记录分数
private int scoreHistory;
// 最高记录
private int highScore;
public GameView(Context context) {
super(context);
initGameMatrix();
}
public GameView(Context context, AttributeSet attrs) {
super(context, attrs);
initGameMatrix();
}
public void startGame() {
initGameMatrix();
initGameView(Config.ItemSize);
}
private void initGameView(int cardSize) {
removeAllViews();
GameItem card;
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
card = new GameItem(getContext(), 0);
addView(card, cardSize, cardSize);
// 初始化GameMatrix全部为0 空格List为所有
gameMatrix[i][j] = card;
blanks.add(new Point(i, j));
}
}
// 添加随机数字
addRandomNum();
addRandomNum();
}
/**
* 撤销上次移动
*/
public void revertGame() {
if (gameMatrixHistory.length != 0) {
Game.getGameActivity().setScore(scoreHistory, 0);
Config.Scroe = scoreHistory;
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
gameMatrix[i][j].setNum(gameMatrixHistory[i][j]);
}
}
}
}
/**
* 添加随机数字
*/
private void addRandomNum() {
getBlanks();
if (blanks.size() > 0) {
int randomNum = (int) (Math.random() * blanks.size());
Point randomPoint = blanks.get(randomNum);
gameMatrix[randomPoint.x][randomPoint.y].setNum(Math.random() > 0.2d ? 2 : 4);
Game.getGameActivity().getAnimationLayer().animcreate(gameMatrix[randomPoint.x][randomPoint.y]);
}
}
/**
* 获取空格Item数组
*/
private void getBlanks() {
blanks.clear();
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
if (gameMatrix[i][j].getNum() == 0) {
blanks.add(new Point(i, j));
}
}
}
}
/**
* 初始化View
*/
private void initGameMatrix() {
// 初始化矩阵
removeAllViews();
scoreHistory = 0;
Config.Scroe = 0;
Config.GameLines = Config.sp.getInt(Config.KEY_GameLines, 4);
gameLines = Config.GameLines;
gameMatrix = new GameItem[gameLines][gameLines];
gameMatrixHistory = new int[gameLines][gameLines];
calList = new ArrayList<Integer>();
blanks = new ArrayList<Point>();
highScore = Config.sp.getInt(Config.KEY_HighScore, 0);
setColumnCount(gameLines);
setRowCount(gameLines);
setOnTouchListener(this);
// 初始化View参数
DisplayMetrics metrics = new DisplayMetrics();
WindowManager wm = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
display.getMetrics(metrics);
Config.ItemSize = metrics.widthPixels / Config.GameLines;
initGameView(Config.ItemSize);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
saveHistoryMatrix();
startX = (int) event.getX();
startY = (int) event.getY();
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
endX = (int) event.getX();
endY = (int) event.getY();
judgeDirection(endX - startX, endY - startY);
if (isMoved()) {
addRandomNum();
// 修改显示分数
Game.getGameActivity().setScore(Config.Scroe, 0);
}
int result = checkCompleted();
if (result == 0) {
if (Config.Scroe > highScore) {
Editor editor = Config.sp.edit();
editor.putInt(Config.KEY_HighScore, Config.Scroe);
editor.commit();
}
Toast.makeText(getContext(), "lose", Toast.LENGTH_LONG).show();
Config.Scroe = 0;
} else if (result == 2) {
Toast.makeText(getContext(), "success", Toast.LENGTH_LONG).show();
Config.Scroe = 0;
}
break;
default:
break;
}
return true;
}
/**
* 保存历史记录
*/
private void saveHistoryMatrix() {
scoreHistory = Config.Scroe;
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
gameMatrixHistory[i][j] = gameMatrix[i][j].getNum();
}
}
}
/**
* 根据偏移量判断移动方向
*
* @param offsetX
* @param offsetY
*/
private void judgeDirection(int offsetX, int offsetY) {
if (Math.abs(offsetX) > Math.abs(offsetY)) {
if (offsetX > 10) {
swipeRight();
} else {
swipeLeft();
}
} else {
if (offsetY > 10) {
swipeDown();
} else {
swipeUp();
}
}
}
/**
* 判断是否结束
*
* @return 0:结束 1:正常 2:成功
*/
private int checkCompleted() {
getBlanks();
if (blanks.size() == 0) {
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
if (j < gameLines - 1) {
if (gameMatrix[i][j].getNum() == gameMatrix[i][j + 1].getNum()) {
return 1;
}
}
if (i < gameLines - 1) {
if (gameMatrix[i][j].getNum() == gameMatrix[i + 1][j].getNum()) {
return 1;
}
}
}
}
return 0;
}
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
if (gameMatrix[i][j].getNum() == 2048) {
return 2;
}
}
}
return 1;
}
/**
* 判断是否移动过(是否需要新增Item)
*
* @return
*/
private boolean isMoved() {
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
if (gameMatrixHistory[i][j] != gameMatrix[i][j].getNum()) {
return true;
}
}
}
return false;
}
/**
* 滑动事件：上
*/
private void swipeUp() {
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
int currentNum = gameMatrix[j][i].getNum();
if (currentNum != 0) {
if (keyItemNum == -1) {
keyItemNum = currentNum;
} else {
if (keyItemNum == currentNum) {
calList.add(keyItemNum * 2);
Config.Scroe += keyItemNum * 2;
keyItemNum = -1;
} else {
calList.add(keyItemNum);
keyItemNum = currentNum;
}
}
} else {
continue;
}
}
if (keyItemNum != -1) {
calList.add(keyItemNum);
}
// 改变Item值
for (int j = 0; j < calList.size(); j++) {
gameMatrix[j][i].setNum(calList.get(j));
}
for (int m = calList.size(); m < gameLines; m++) {
gameMatrix[m][i].setNum(0);
}
// 重置行参数
keyItemNum = -1;
calList.clear();
}
}
/**
* 滑动事件：下
*/
private void swipeDown() {
for (int i = gameLines - 1; i >= 0; i--) {
for (int j = gameLines - 1; j >= 0; j--) {
int currentNum = gameMatrix[j][i].getNum();
if (currentNum != 0) {
if (keyItemNum == -1) {
keyItemNum = currentNum;
} else {
if (keyItemNum == currentNum) {
calList.add(keyItemNum * 2);
Config.Scroe += keyItemNum * 2;
keyItemNum = -1;
} else {
calList.add(keyItemNum);
keyItemNum = currentNum;
}
}
} else {
continue;
}
}
if (keyItemNum != -1) {
calList.add(keyItemNum);
}
// 改变Item值
for (int j = 0; j < gameLines - calList.size(); j++) {
gameMatrix[j][i].setNum(0);
}
int index = calList.size() - 1;
for (int m = gameLines - calList.size(); m < gameLines; m++) {
gameMatrix[m][i].setNum(calList.get(index));
index--;
}
// 重置行参数
keyItemNum = -1;
calList.clear();
index = 0;
}
}
/**
* 滑动事件：左
*/
private void swipeLeft() {
for (int i = 0; i < gameLines; i++) {
for (int j = 0; j < gameLines; j++) {
int currentNum = gameMatrix[i][j].getNum();
if (currentNum != 0) {
if (keyItemNum == -1) {
keyItemNum = currentNum;
} else {
if (keyItemNum == currentNum) {
calList.add(keyItemNum * 2);
Config.Scroe += keyItemNum * 2;
keyItemNum = -1;
} else {
calList.add(keyItemNum);
keyItemNum = currentNum;
}
}
} else {
continue;
}
}
if (keyItemNum != -1) {
calList.add(keyItemNum);
}
// 改变Item值
for (int j = 0; j < calList.size(); j++) {
gameMatrix[i][j].setNum(calList.get(j));
}
for (int m = calList.size(); m < gameLines; m++) {
gameMatrix[i][m].setNum(0);
}
// 重置行参数
keyItemNum = -1;
calList.clear();
}
}
/**
* 滑动事件：右
*/
private void swipeRight() {
for (int i = gameLines - 1; i >= 0; i--) {
for (int j = gameLines - 1; j >= 0; j--) {
int currentNum = gameMatrix[i][j].getNum();
if (currentNum != 0) {
if (keyItemNum == -1) {
keyItemNum = currentNum;
} else {
if (keyItemNum == currentNum) {
calList.add(keyItemNum * 2);
Config.Scroe += keyItemNum * 2;
keyItemNum = -1;
} else {
calList.add(keyItemNum);
keyItemNum = currentNum;
}
}
} else {
continue;
}
}
if (keyItemNum != -1) {
calList.add(keyItemNum);
}
// 改变Item值
for (int j = 0; j < gameLines - calList.size(); j++) {
gameMatrix[i][j].setNum(0);
}
int index = calList.size() - 1;
for (int m = gameLines - calList.size(); m < gameLines; m++) {
gameMatrix[i][m].setNum(calList.get(index));
index--;
}
// 重置行参数
keyItemNum = -1;
calList.clear();
index = 0;
}
}
}
原文地址：http://blog.csdn.net/eclipsexys/article/details/24582957
