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。

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]); }    }

在判断生成2、4的时候，我们使用了通常产生范围随机数的方法，同时指定2和4的比例在1:4，当然这个大家可以根据需要更改

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);    }

这部分最好还是结合源码看比较好，注释清晰

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();     } }    }

下面我们来讲2048的终极奥义了，就是算法的实现，具体的算法在第一篇中已经讲解了大概的过程， 点我去看，下面我们选一个方向来讲如何实现

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);     }     // 重置行参数     keyItemNum = -1;     calList.clear(); }    }

概括来说，就是选取基准，挨个比较，重新排列

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;    }

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; }    }}

PS 需要源码的请留言

PS 需要源码的请留言