《2048》是一款比较流行的数字游戏，最早于2014年3月20日发行。原版2048首先在GitHub上发布，原作者是Gabriele Cirulli，后被移植到各个平台。这款游戏是基于《1024》和《小3传奇》的玩法开发而成的新型数字游戏。游戏源地址：http://gabrielecirulli.github.io/2048/
1、新建android项目game2048
修改activity_main.xml文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" > <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" /> </LinearLayout>
2、设计2048游戏布局
继续修改activity_main.xml文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" > <LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" > <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/score" /> <TextView
android:id="@+id/tvScore"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout> <GridLayout
android:id="@+id/gameView"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" >
</GridLayout> </LinearLayout>
3、实现2048游戏主类GameView
新建类GameView，继承自GridLayout
package com.wuyudong.game2048; import android.content.Context;
import android.util.AttributeSet;
import android.widget.GridLayout; public class GameView extends GridLayout { public GameView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initGameView();
} public GameView(Context context, AttributeSet attrs) {
super(context, attrs);
initGameView();
} public GameView(Context context) {
super(context);
initGameView();
} private void initGameView() { } }
继续修改activity_main.xml文件：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" > <LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" > <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/score" /> <TextView
android:id="@+id/tvScore"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout> <!-- 把类GameView绑定到一起 -->
<com.wuyudong.game2048.GameView
android:id="@+id/gameView"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" >
</com.wuyudong.game2048.GameView> </LinearLayout>
4、游戏2048在Android平台的触控交互设计
添加触控交互相关代码
private void initGameView() {
setOnTouchListener(new OnTouchListener() {
//记录起始位置和偏移坐标
private float startX, startY, offsetX, offsetY;
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: //监听手指按下的初始位置坐标
startX = event.getX();
startY = event.getY();
break;
case MotionEvent.ACTION_UP: //监听手指离开时的位置坐标
offsetX = event.getX() - startX;
offsetY = event.getY() - startY;
if (Math.abs(offsetX) > Math.abs(offsetY)) {
if (offsetX < -5) {
System.out.println("left");
} else if (offsetX > 5) {
System.out.println("right");
}
} else {
if (offsetY < -5) {
System.out.println("up");
} else if (offsetY > 5) {
System.out.println("down");
}
}
break;
default:
break;
}
return true;
}
});
}
5、实现2048游戏的卡片类
编写卡片类Card.java
package com.wuyudong.game2048; import android.content.Context;
import android.widget.FrameLayout;
import android.widget.TextView; public class Card extends FrameLayout { public Card(Context context) {
super(context);
lable = new TextView(getContext());
lable.setTextSize(32); LayoutParams lp = new LayoutParams(-1, -1);
addView(lable, lp);
setNum(0);
} private int num = 0; public int getNum() {
return num;
} public void setNum(int num) {
this.num = num;
lable.setText(num + "");
} public boolean equals(Card o) {
return getNum() == o.getNum();
} private TextView lable; }
6、添加2048游戏卡片
先添加相关代码看看效果
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
int cardWidth = (Math.min(w, h) - 10) / 4; addCards(cardWidth, cardWidth); } private void addCards(int cardWith, int cardHeight){
Card c;
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
c=new Card(getContext());
c.setNum(2);
addView(c, cardWith, cardHeight);
}
}
}
运行后的效果
出现问题，所有的2都出现在同一行中，解决办法：
在initGameView() 中添加代码，指定为四列：setColumnCount(4);
lable.setGravity(Gravity.CENTER);
接着添加相关的背景颜色以及卡片数字的背景颜色，还有卡片间距
setBackgroundColor(0xffbbada0); // 设置整体背景
lable.setBackgroundColor(0x33ffffff);
lable.setGravity(Gravity.CENTER);
lp.setMargins(10, 10, 0, 0);
运行后界面如下：
7、在2048游戏中添加随机数
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
int cardWidth = (Math.min(w, h) - 10) / 4;
addCards(cardWidth, cardWidth);
startGame();
}
private void startGame() {
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
cardsMap[x][y].setNum(0);
}
}
addRandomNum();
addRandomNum();
}
private void addRandomNum() {
emptyPoints.clear();// 清空
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
if (cardsMap[x][y].getNum() <= 0) {
emptyPoints.add(new Point(x, y));
}
}
}
Point p = emptyPoints.remove((int) (Math.random() * emptyPoints.size()));
cardsMap[p.x][p.y].setNum(Math.random() > 0.1 ? 2 : 4);
}
8、实现2048游戏逻辑
private void swipeLeft() { // 往左滑动手指
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
for (int x1 = x + 1; x1 < 4; x1++) {
if (cardsMap[x1][y].getNum() > 0) {
if (cardsMap[x][y].getNum() <= 0) {
cardsMap[x][y].setNum(cardsMap[x1][y].getNum());
cardsMap[x1][y].setNum(0);
x--;
break;
} else if(cardsMap[x][y].equals(cardsMap[x1][y])){
cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
cardsMap[x1][y].setNum(0);
break;
}
}
}
}
}
}
private void swipeRight() {
for (int y = 0; y < 4; y++) {
for (int x = 3; x >=0; x--) {
for (int x1 = x - 1; x1 >=0; x1--) {
if (cardsMap[x1][y].getNum() > 0) {
if (cardsMap[x][y].getNum() <= 0) {
cardsMap[x][y].setNum(cardsMap[x1][y].getNum());
cardsMap[x1][y].setNum(0);
x++;
break;
} else if(cardsMap[x][y].equals(cardsMap[x1][y])){
cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
cardsMap[x1][y].setNum(0);
break;
}
}
}
}
}
}
private void swipeUp() {
for (int x = 0; x < 4; x++) {
for (int y = 0; y < 4; y++) {
for (int y1 = y + 1; y1 < 4; y1++) {
if (cardsMap[x][y1].getNum() > 0) {
if (cardsMap[x][y].getNum() <= 0) {
cardsMap[x][y].setNum(cardsMap[x][y1].getNum());
cardsMap[x][y1].setNum(0);
y--;
break;
} else if(cardsMap[x][y].equals(cardsMap[x][y1])){
cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
cardsMap[x][y1].setNum(0);
break;
}
}
}
}
}
}
private void swipeDown() {
for (int x = 0; x < 4; x++) {
for (int y = 3; y >=0; y--) {
for (int y1 = y - 1; y1 >= 0; y1--) {
if (cardsMap[x][y1].getNum() > 0) {
if (cardsMap[x][y].getNum() <= 0) {
cardsMap[x][y].setNum(cardsMap[x][y1].getNum());
cardsMap[x][y1].setNum(0);
y++;
break;
} else if(cardsMap[x][y].equals(cardsMap[x][y1])){
cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
cardsMap[x][y1].setNum(0);
break;
}
}
}
}
}
}
private Card[][] cardsMap = new Card[4][4];
private List<Point> emptyPoints = new ArrayList<Point>();
9、游戏2048计分
MainActivity.java 中添加相关代码：
package com.wuyudong.game2048; import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView; public class MainActivity extends Activity { public MainActivity() {
mainActivity = this;
} @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); tvScore = (TextView) findViewById(R.id.tvScore);
} @Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
} public void clearScore() {
score = 0;
showScore();
} public void showScore() {
tvScore.setText(score + "");
} public void addScore(int s) {
score += s;
showScore();
} private int score = 0;
private TextView tvScore;
private static MainActivity mainActivity = null; public static MainActivity getMainActivity() {
return mainActivity;
} }
10、检查2048游戏结束
private void checkComplete() {
boolean complete = true;
ALL: for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
if (cardsMap[x][y].getNum() == 0
|| (x > 0 && cardsMap[x][y].equals(cardsMap[x - 1][y]))
|| (x < 3 && cardsMap[x][y].equals(cardsMap[x + 1][y]))
|| (y > 0 && cardsMap[x][y].equals(cardsMap[x][y - 1]))
|| (y < 3 && cardsMap[x][y].equals(cardsMap[x][y + 1]))) {
complete = false;
break ALL;
}
}
}
if (complete) {
new AlertDialog.Builder(getContext())
.setTitle("Oh")
.setMessage("Game Over!")
.setPositiveButton("restart",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
startGame();
}
}).show();
}
}