我也来开发2048之终极奥义
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。
依照惯例，我们已经把准备工作都做好了。今天这一部分信息量比較大，也是整个游戏的核心所在，所以我准备分功能来讲。最后大家结合源代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，一个是加入随机数字
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所有为0 空格List为所有
gameMatrix[i][j] = card;
blanks.add(new Point(i, j));
}
}
// 加入随机数字
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]);
}
}在推断生成2、4的时候，我们使用了通常产生范围随机数的方法。同一时候指定2和4的比例在1:4，当然这个大家能够依据须要更改
2、详细參数等初始化
这个比較简单了。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參数
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);
}这部分不妨结合源代码看比較好，凝视清晰
3、触摸事件
触摸的时候推断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();
// 改动显示分数
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;
}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();
}
}
}以下我们来讲2048的终极奥义了。就是算法的实现，详细的算法在第一篇中已经解说了大概的过程。点我去看。以下我们选一个方向来讲怎样实现
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);
}
// 重置行參数
keyItemNum = -1;
calList.clear();
}
}概括来说。就是选取基准，挨个比較，又一次排列
代码非常清晰。大家看看就知道了。关键是怎样总结出这个算法。
4、以下就是推断游戏什么时候须要新加入一个数字Item
当当前的数字矩阵结构域上次的结构发生区别的时候，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;
}这个地方我们使用了一个历史矩阵来存储上一次的数字矩阵
5、最后就是怎样推断结束了
假设当前还有空格的Item，则必然没有结束，若相邻的数字都没有同样的数字，则必然结束，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;
}以下放出一些终于的图片：
因为刚换了工作，上下班时间倍增，所以写代码的时间也少了，事实上关于这个游戏我还有非常多想法没做。这个版本号的2048，比网上的版本号，多了撤销上次移动功能。多了能够定制游戏维数的功能，多了配置目标值的功能，我这个版本号的2048，配置要求极低，相比cocos2dx版本号的来说，极大的减少了电量消耗，可配置性更强。这些都是我在玩的过程中。认为不爽的地方，然后改进的。另一些想法。眼下还没有去做。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、加入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。设置加入的随机数的位置和大小，这个用我如今的代码是非常好实现的，仅仅要把addRandom方法改下，写一个debugRandom方法就OK了
2、分享功能。这个用ShareSdk就能够了，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。这个网上非常多了。我们也能够自己定义一套背景，这个实现也是比較简单的，仅仅要把GameItem这个类里面的Item的背景加入一个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相应矩阵 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所有为0 空格List为所有 gameMatrix[i][j] = card; blanks.add(new Point(i, j)); } } // 加入随机数字 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]); } } } } /** * 加入随机数字 */ 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參数 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(); // 改动显示分数 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(); } } } /** * 依据偏移量推断移动方向 * * @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(); } } } /** * 推断是否结束 * * @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; } /** * 推断是否移动过(是否须要新增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); } // 重置行參数 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--; } // 重置行參数 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); } // 重置行參数 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--; } // 重置行參数 keyItemNum = -1; calList.clear(); index = 0; } } }
PS 须要源代码的请留言
