『牛角书』HarmonyOS手机小游戏——数字华容道

概述

本个demo将从零基础开始完成鸿蒙小游戏APP在手机上的编译在项目中我们所使用到的软件为DevEco Studio，下载地址为：DevEco Studio下载、DevEco Studio安装教程，在项目中我们要实现的内容为数字华容道APP的开发。

1.打开引用首先为数字华容道的初始界面，点击开始游戏即会切换到数字华容道的游戏界面。

2. 进入数字华容道的游戏界面显示4*4的方阵，方阵中分布有随意打乱的1至15的数字和一个空白方格，方阵下方显示一个“重新开始”的按钮和一个“返回”按钮，点击“重新开始”按钮即会重新生成随意打乱的1至15的数字和一个空白方格的方阵，点击“返回”按钮即会切换到数字华容道的初始界面，最下方有四个指示不同方向箭头的按钮，点击任一按钮或向上、下、左、右任一方向滑动，空白方格周围对应位置的方格便会随之向对应的方向移动一格。

正文

1.先在entry>src>main>config.json文件中最下方"launchType": “standard"的后面添加以下代码，并且将上方的“label”：“MyPhoneApplication”修改成"label”: “数字华容道”，这样就实现去掉应用上方的标题栏和将应用名称改为数字华容道了。

"orientation": "unspecified","name": "com.example.myphoneapplication.MainAbility","icon": "$media:icon","description": "$string:mainability_description","label": "数字华容道","type": "page","launchType": "standard","metaData": {"customizeData": [{"name": "hwc-theme","value": "androidhwext:style/Theme.Emui.Light.NoTitleBar","extra": ""}]}

2.在entry>src>main>resources>base>layout>ability_main.xml中添加布局，先将事先存在的Text组件删去，添加Image图片组件，引入我们刚才复制粘贴的图片，再添加一个Button按钮组件，加入唯一标识符id并配置好其他相应的属性。

3.将entry>src>main>java>com.example.myphoneapplication>slice>SecondAbilitySlice中的代码修改成如下：

package com.example.myphoneapplication.slice;import com.example.myphoneapplication.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;public class SecondAbilitySlice extends AbilitySlice {public void onStart(Intent intent) {super.onStart(intent);}@Overridepublic void onActive() {super.onActive();}@Overridepublic void onForeground(Intent intent) {super.onForeground(intent);}
}

4.在entry>src>main>java>com.example.myphoneapplication>slice>MainAbilitySlice中的onStart函数中添加一个按钮指向我们（2）中添加的按钮，按钮添加一个响应点击事件的函数，用parsent函数跳转到SecondAbilitySlice。

package com.example.myphoneapplication.slice;import com.example.myphoneapplication.ResourceTable;
import ohos.aafwk.content.Intent;
import ohos.agp.components.Button;
import ohos.agp.components.Component;public class MainAbilitySlice extends ohos.aafwk.ability.AbilitySlice {@Overridepublic void onStart(Intent intent) {super.onStart(intent);super.setUIContent(ResourceTable.Layout_ability_main);Button button = (Button) findComponentById(ResourceTable.Id_button_game);button.setClickedListener(new Component.ClickedListener() {@Overridepublic void onClick(Component component) {present(new SecondAbilitySlice(),new Intent());}});}@Overridepublic void onActive() {super.onActive();}@Overridepublic void onForeground(Intent intent) {super.onForeground(intent);}
}

实现数字的随机打乱 

在entry>src>main>java>com.example.myphoneapplication>slice>SecondAbilitySlice编写代码
先定义个一个位置布局layout和一个二维数组grids，创建函数initializeinitialize()分别对其初始化，在onStart函数中调用函数initializeinitialize()

private float starX, starY, distanceX, distanceY;private DirectionalLayout layout;private int[][] grids;public void onStart(Intent intent) {super.onStart(intent);initialize();}public void initialize(){layout = new DirectionalLayout(this);grids = new int[][]{{1, 2, 3, 4}, {5, 6, 7, 8,}, {9, 10, 11, 12}, {13, 14, 15, 0}};}

然后定义函数drawGrids(int[][] grids)用于绘制4*4方阵和其二维数组对应的数字

public void drawGrids(int[][] grids){layout.setLayoutConfig((new ComponentContainer.LayoutConfig(ComponentContainer.LayoutConfig.MATCH_PARENT,ComponentContainer.LayoutConfig.MATCH_PARENT)));Component.DrawTask task=new Component.DrawTask() {public void onDraw(Component component, Canvas canvas) {Paint mPaint = new Paint();mPaint.setColor(Color.GRAY);RectFloat rect=new RectFloat(2,230,1078,1306);canvas.drawRect(rect,mPaint);for(int row = 0; row < 4; row++){for(int column = 0; column < 4; column++){mPaint.setColor(Color.CYAN);RectFloat rectFloat=new RectFloat(22+column*262,250+row*262,272+column*262,500+row*262);canvas.drawRect(rectFloat,mPaint);mPaint.setColor(Color.YELLOW);mPaint.setTextSize(125);if(grids[row][column]!=0){if(grids[row][column]<10){canvas.drawText(mPaint, String.valueOf(grids[row][column]),105+column*262,425+row*262);}else{canvas.drawText(mPaint, String.valueOf(grids[row][column]),65+column*262,425+row*262);}}}}}};layout.addDrawTask(task);setUIContent(layout);}

再定义函数changeGrids(int[][] grids,int direction)，每次接收一个方向，2表示上移，-1表示左移，1表示右移，-2表示下移，找出空白方格所在位置对应的二维数组下标，对应的方格和空白方格对应的二维数组的数值对调

public void changeGrids(int[][] grids,int direction){int row_0 = 3;int column_0 = 3;int temp;for(int row = 0; row < 4; row++) {for (int column = 0; column < 4; column++) {if(grids[row][column] == 0){row_0 = row;column_0 = column;}}}if(direction == -1 && (column_0 + 1) <= 3){temp = grids[row_0][column_0 + 1];grids[row_0][column_0 + 1] = grids[row_0][column_0];grids[row_0][column_0] = temp;}else if (direction == 1 && (column_0 - 1) >= 0) {temp = grids[row_0][column_0 - 1];grids[row_0][column_0 - 1] = grids[row_0][column_0];grids[row_0][column_0] = temp;} else if (direction == 2 && (row_0 + 1) <= 3) {temp = grids[row_0 + 1][column_0];grids[row_0 + 1][column_0] = grids[row_0][column_0];grids[row_0][column_0] = temp;} else if (direction == -2 && (row_0 - 1) >= 0) {temp = grids[row_0 - 1][column_0];grids[row_0 - 1][column_0] = grids[row_0][column_0];grids[row_0][column_0] = temp;}}

定义函数createGrids(int[][] grids)用于随机生成一个表示方向的数字，循环调用函数changeGrids(grids,direction)用于随机打乱二维数组对应的数字

public void createGrids(int[][] grids){int[] array = {-1,-2,1,2};for(int i = 0; i < 100; i++){int random = (int)Math.floor(Math.random()*4);int direction = array[random];changeGrids(grids,direction);}}
最后在initialize()函数中调用createGrids(grids)函数和drawGrids(grids)函数public void initialize(){layout = new DirectionalLayout(this);grids = new int[][]{{1, 2, 3, 4}, {5, 6, 7, 8,}, {9, 10, 11, 12}, {13, 14, 15, 0}};createGrids(grids);drawGrids(grids);}

 实现游戏成功界面

在entry>src>main>java>com.example.myphoneapplication>slice>SecondAbilitySlice编写代码
首先定义一个函数drawText()用于绘制游戏成功字样

 public void drawText(){Text text=new Text(this);text.setText("游戏成功");text.setTextSize(100);text.setTextColor(Color.BLUE);text.setTextAlignment(TextAlignment.CENTER);text.setMarginsTopAndBottom(-2000,0);text.setMarginsLeftAndRight(350,0);layout.addComponent(text);setUIContent(layout);}

然后定义一个函数gameover()用于判断二维数组的数字是否按顺序排列，当二维数组的数字按顺序排列时返回true，否则返回false

public boolean gameover() {int[][] gameoverGrids = {{1, 2, 3, 4}, {5, 6, 7, 8,}, {9, 10, 11, 12}, {13, 14, 15, 0}};for (int row = 0; row < 4; row++) {for (int column = 0; column < 4; column++) {if (grids[row][column] != gameoverGrids[row][column]) {return false;}}}return true;}

再在drawButton()函数中重新开始按钮中添加一个响应点击事件的函数，用于调用函数initialize()实现重新生成随意打乱的1至15的数字和一个空白方格的方阵，返回按钮中添加一个响应点击事件的函数，用parsen函数返回数字华容道的初始界面，四个指示不同方向箭头的按钮的响应点击事件的函数中增加一个判断，当函数gameover（）返回为false时才调用各自的changeGrids(grids,direction)函数，最后增加一个判断，当函数gameover（）返回为true时调用函数drawText(）

public void drawButton(){//部分代码没有贴出，可自行下载源代码查看button.setClickedListener(new Component.ClickedListener() {@Overridepublic void onClick(Component component) {initialize();}});button0.setClickedListener(new Component.ClickedListener() {@Overridepublic void onClick(Component component) {present(new SecondAbilitySlice(),new Intent());}});button1.setClickedListener(new Component.ClickedListener() {@Overridepublic void onClick(Component component) {if (gameover() == false){changeGrids(grids,2);}}});button2.setClickedListener(new Component.ClickedListener() {@Overridepublic void onClick(Component component) {if (gameover() == false){changeGrids(grids,-1);}}});button3.setClickedListener(new Component.ClickedListener() {@Overridepublic void onClick(Component component) {if (gameover() == false){changeGrids(grids,1);}}});button4.setClickedListener(new Component.ClickedListener() {@Overridepublic void onClick(Component component) {if (gameover() == false){changeGrids(grids,-2);}}});if(gameover()){drawText();}}

在函数slideGrids()函数中增加一个判断，当函数gameover（）返回为false时才调用changeGrids(grids,direction)函数，最后增加一个判断，当函数gameover（）返回为true时调用函数drawText()

public void slideGrids(){//部分代码没有贴出，可自行下载源代码查看if (gameover() == false){//{...}}if(gameover()){drawText();}}

 至此完成

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