代码如下：
<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:layout_gravity="center_horizontal"
android:background="@drawable/pic3"
android:orientation="vertical"
android:paddingBottom="20dp"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:paddingTop="20dp"
tools:context=".MainActivity">
<com.hnkjxy.a2048.MainView
android:id="@+id/gameView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:layout_weight="1">
</com.hnkjxy.a2048.MainView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:gravity="center"
android:orientation="horizontal"
>
<Button
android:id="@+id/btnrestart"
android:layout_width="wrap_content"
android:layout_weight="1"
android:layout_height="wrap_content"
android:background="@drawable/btn_style"
android:onClick="onClick"
android:text="restart" />
<Button
android:id="@+id/btnquit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@drawable/btn_style"
android:text="quit"
android:onClick="onClick"/>
<Button
android:id="@+id/btnhelp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@drawable/btn_style"
android:text="help!"
android:onClick="onClick"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ffff"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Your Score：" />
<TextView
android:id="@+id/tv_currentscore"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:paddingLeft="20dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Top Score：" />
<TextView
android:id="@+id/tv_topscore"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:paddingLeft="20dp" />
</LinearLayout>
</LinearLayout>
public class MainView extends GridLayout{
public MainView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initGameView();
}
public MainView(Context context, AttributeSet attrs) {
super(context, attrs);
initGameView();
}
public MainView(Context context) {
super(context);
initGameView();
}
//游戏初始化方法
private void initGameView(){
setColumnCount(4);
//将面板设置成4列
System.out.println("initGameView");
setOnTouchListener(new OnTouchListener() {
/*
* startX:手机刚开始在屏幕上的X坐标
* startY:手机刚开始在屏幕上的Y坐标
* offsetX,offsetY,分别是手指在屏幕上的X,Y上的偏移量
*/
private float startX,startY,offsetX,offsetY;
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()){
case MotionEvent.ACTION_DOWN:
startX = event.getX();
startY = event.getY();
break;
case MotionEvent.ACTION_UP:
offsetX = event.getX() - startX;
offsetY = event.getY() - startY;
if(Math.abs(offsetX) > Math.abs(offsetY)){
if(offsetX < -5){
swipeLeft();
System.out.println("Left");
}else if(offsetX > 5){
swipeRight();
System.out.println("Right");
}
} else{
if(offsetY < -5){
swipeUp();
System.out.println("Up");
}else if(offsetY > 5){
swipeDown();
System.out.println("Down");
}
}
break;
}
return true;
}
});
}
//当布局的尺寸发生变化时，会执行该方法
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();
}
//添加卡片的方法
private void addCards( int cardWith,int cardHeight){
Count c;
//遍历每一张卡片
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
c = new Count(getContext());
c.setNum(2);//给每一张卡片赋值
addView(c,cardWith,cardHeight);
cardsMap[x][y] = c;
}
}
}
//开始游戏的方法
public void startGame(){
MainActivity.getMainActivity().clearScore();
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
cardsMap[x][y].setNum(0);
emptyPoint.add(new Point(x,y));
}
}
addRandomNum();
addRandomNum();
}
//添加随机数
private void addRandomNum() {
emptyPoint.clear();
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
if (cardsMap[x][y].getNum()<=0) {
emptyPoint.add(new Point(x,y));
}
}
}
Point p
=emptyPoint.remove(
(int)(Math.random()
*emptyPoint.size()));
cardsMap[p.x][p.y].setNum(Math.random()>0.1?2:4);
}
//向左滑动
public void swipeLeft(){
boolean meger = false;
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){
/*
* 将下标为（x，y）所在位置的卡片上的数字
* 设置为，坐标为(x1,y)所在位置的卡片上的值；
* 第二步，将坐标（x1，y）所在位置的卡片上的数字
* 设置为0
* （即：变成空卡片）
*/
cardsMap[x][y].setNum(
cardsMap[x1][y].getNum());
cardsMap[x1][y].setNum(0);
x--;
meger =true;
break;
}else if(cardsMap[x][y].equals(cardsMap[x1][y])){
cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
cardsMap[x1][y].setNum(0);
MainActivity.getMainActivity().
addScore(cardsMap[x][y].getNum());
meger = true;
}
break;
}
}
}
}
if(meger){
addRandomNum();
checkComplete();
}
}
//向右滑动
public void swipeRight(){
boolean meger = false;
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++;
meger =true;
break;
}else if(cardsMap[x][y].equals(cardsMap[x1][y])){
cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
cardsMap[x1][y].setNum(0);
MainActivity.getMainActivity().
addScore(cardsMap[x][y].getNum());
meger =true;
}break;
}
}
}
}
if(meger){
addRandomNum();
checkComplete();
}
}
//向上滑动
public void swipeUp(){
boolean meger = false;
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--;
meger =true;
break;
}else if(cardsMap[x][y].equals(cardsMap[x][y1])){
cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
cardsMap[x][y1].setNum(0);
MainActivity.getMainActivity().
addScore(cardsMap[x][y].getNum());
meger =true;
}
break;
}
}
}
}
if(meger){
addRandomNum();
checkComplete();
}
}
//向下滑动
public void swipeDown(){
boolean meger = false;
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++;
meger =true;
break;
}else if(cardsMap[x][y].equals(cardsMap[x][y1])){
cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
cardsMap[x][y1].setNum(0);
MainActivity.getMainActivity().
addScore(cardsMap[x][y].getNum());
meger =true;
}
break;
}
}
}
}
if(meger){
addRandomNum();
checkComplete();
}
}
//检查游戏是否结束的方法
public void checkComplete(){
boolean complete = true;//记录游戏的状态
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;
//break 用于跳出循环，但是只能跳出一层循环
//break ALL:可跳出所有的循环
}
}
}
if (complete){
new AlertDialog.Builder(getContext())
.setTitle("hello!")
.setMessage("GAME OVER")
.setPositiveButton("RESTART", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
startGame();
}
})
.setNegativeButton("QUIT", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
MainActivity.getMainActivity().finish();
}
}).show();
}
}
//存放卡片的二维数组,便于对卡片进行操作
private Count[][] cardsMap = new Count[4][4];
private List<Point> emptyPoint = new ArrayList<Point>();
}
