我也来开发2048之终极奥义

版权声明：本文为博主原创文章，未经博主同意不得转载。 https://blog.csdn.net/x359981514/article/details/24582957

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;
    }

当中推断偏移的方法

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();
	    }
	}
    }

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

PS 须要源代码的请留言