android---2048游戏实现

帮同学做的游戏,为加快游戏开发进度,参考了某在线学院的设计教程

根据界面,主要实现4*4的格子方块比较麻烦,其他的都挺简单的.总体为实现4*4的格子,自定义GridLayout,并在其中添加触摸监听事件,进行一系列的操作,从而实现游戏的逻辑,最后再添加动画效果即可完成.

下面是设计思路:

一.GameView的设计

首先自定义一个类,继承GridLayout,添加两个构造方法

public class GameView extends GridLayout {

    //两个必要的构造方法
    public GameView(Context context) {
        super(context);
        initView();
    }

    public GameView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView();
    }
    }

接下来在initView()中实现设置GridLayout为四列,并且添加触摸事件监听.(监听方法还可以重写onTouchEvent(),返回值为true即可),判断触摸方向,主要是通过x轴和y轴的偏移量的比较

 //初始化变量的方法
    public void initView(){
        //设置只有四列
        setColumnCount(4);
        //设置监听事件
        setOnTouchListener(new OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                        setX = event.getX();
                        setY = event.getY();
                        break;
                    case MotionEvent.ACTION_UP:
                        offsetX = event.getX() - setX;
                        offsetY = event.getY() - setY;
                        //判断滑动方向
                        if (Math.abs(offsetX) >= Math.abs(offsetY)) {
                            if (offsetX > 0) {
                                swipright();
                            } else if (offsetX < 0) {
                                swipleft();
                            }
                        } else {
                            if (offsetY > 0) {
                                swipdown();
                            } else if (offsetY < 0) {
                                swipup();
                            }
                        }

                        break;
                }

                return true;
            }
        });
    }

监听事件实现后先放在那里,接下来把4*4的里面每个小格子设计成小卡片,每个卡片就是一个TextView,卡片设计很简单,需要什么就添加什么,默认数字为0,这个时候代表是空值,也就是空卡片.

public class Card extends FrameLayout {

    public Card(Context context) {
        super(context);
        tvCard = new TextView(getContext());
        tvCard.setTextSize(40f);
        tvCard.setGravity(Gravity.CENTER);
        LayoutParams lp = new LayoutParams(-1,-1);
        lp.setMargins(15,15,0,0);
        addView(tvCard, lp);
    }
    //卡片上的数字
    private int num;
    private boolean is2048 = true;
    private void judgeIs2048(int num){
        if (is2048){
            if (2048==num){
                Toast.makeText(getContext(),"恭喜赵莹达到2048",Toast.LENGTH_LONG).show();
                is2048 = false;
            }
        }
    }
    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
        if (num<=0){
            tvCard.setText("");
        }else {
        //这里传进去的是字符串因此需要加上空字符
            tvCard.setText(num+"");
        }
        switch (num) {
            case 0:
                tvCard.setBackgroundColor(0x33ffffff);
                break;
            case 2:
                tvCard.setBackgroundColor(0xffeee4da);
                break;
            case 4:
                tvCard.setBackgroundColor(0xffede0c8);
                break;
            case 8:
                tvCard.setBackgroundColor(0xfff2b179);
                break;
            case 16:
                tvCard.setBackgroundColor(0xfff59563);
                break;
            case 32:
                tvCard.setBackgroundColor(0xfff67c5f);
                break;
            case 64:
                tvCard.setBackgroundColor(0xfff65e3b);
                break;
            case 128:
                tvCard.setBackgroundColor(0xffedcf72);
                break;
            case 256:
                tvCard.setBackgroundColor(0xffedcc61);
                break;
            case 512:
                tvCard.setBackgroundColor(0xffedc850);
                break;
            case 1024:
                tvCard.setBackgroundColor(0xffedc53f);
                break;
            case 2048:
                tvCard.setBackgroundColor(0xffedc22e);
                break;
            default:
                tvCard.setBackgroundColor(0xff3c3a32);
                break;
        }
        judgeIs2048(num);
    }


    //判断是否相等,用于合并
    public boolean equals(Card o) {
        return getNum()==o.getNum();
    }

    //用于显示数字
    private TextView tvCard;

    public TextView getTvCard() {
        return tvCard;
    }
}

卡片设计就需要添加到GameView里面,这个时候重写onSizeChanged()函数,这个在程序打开的时候运行一次,通过他来动态设计卡片大小,并且添加卡片和开始游戏.

@Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, w, oldw, oldh);
        Config.CARD_WIDTH = (Math.min(w,h)-10)/4;
        AddCard(Config.CARD_WIDTH);
        StartGame();

    }

添加卡片,一开始全设置为0,也就是全部添加空卡片

 //添加卡片
    private void AddCard(int CARD_WIDTH){
        Card c;
        for (int x = 0;x<4;x++){
            for (int y = 0;y<4;y++){
               c = new Card(getContext());
                c.setNum(0);
                addView(c, CARD_WIDTH, CARD_WIDTH);
                cardMap[y][x] = c;
            }
        }
    }

游戏开始需要随机添加两张卡片,数值2或者4,出现比率9:1

//开始游戏
    public void StartGame(){

        for (int y = 0;y<4;y++){
            for (int x = 0;x<4;x++){
                cardMap[y][x].setNum(0);
            }
        }
        AddRandomCard();
        AddRandomCard();
    }

随机添加卡片设计

//添加随机卡片
    private void AddRandomCard(){
        CardPoint.clear();
        for (int y = 0;y<4;y++){
            for (int x = 0;x<4;x++){
                if (cardMap[x][y].getNum()<=0){
                    CardPoint.add(new Point(x,y));
                }
            }
        }
        //把一张空卡片换成带数字的
        Point p = CardPoint.remove((int)(Math.random()*CardPoint.size()));
        cardMap[p.x][p.y].setNum(Math.random()>0.1?2:4);
        MainActivity.getMainActivity().getAnimLayer().createScaleTo1(cardMap[p.x][p.y]);

    }

这样大体框架就设计好了
接下来是滑动事件,这里只举例左滑

private void swipleft(){
        boolean status = false;
        for (int y = 0; y < 4; y++) {
            for (int x = 0; x < 4; x++) {

                for (int x1 = x+1; x1 < 4; x1++) {
                    if (cardMap[x1][y].getNum()>0) {

                        if (cardMap[x][y].getNum()<=0) {

                            MainActivity.getMainActivity().getAnimLayer().createMoveAnim(cardMap[x1][y],cardMap[x][y], x1, x, y, y);
                            cardMap[x][y].setNum(cardMap[x1][y].getNum());
                            cardMap[x1][y].setNum(0);
                            x--;
                            status = true;
                        }else if (cardMap[x][y].equals(cardMap[x1][y])) {
                            MainActivity.getMainActivity().getAnimLayer().createMoveAnim(cardMap[x1][y], cardMap[x][y],x1, x, y, y);
                            cardMap[x][y].setNum(cardMap[x][y].getNum() * 2);
                            cardMap[x1][y].setNum(0);
                            MainActivity.getMainActivity().addScore(cardMap[x][y].getNum());
                            status = true;
                        }
                        break;
                    }
                }
            }
        }
        if (status){
            AddRandomCard();
            checkGame();
        }
    }

每次添加卡片还需要判断是否结束游戏

//结束游戏
    private void checkGame(){
        boolean complete = true;

        ALL:
        for (int y = 0; y < 4; y++) {
            for (int x = 0; x < 4; x++) {
                if (cardMap[x][y].getNum()==0||
                        (x>0&&cardMap[x][y].equals(cardMap[x-1][y]))||
                        (x<3&&cardMap[x][y].equals(cardMap[x+1][y]))||
                        (y>0&&cardMap[x][y].equals(cardMap[x][y-1]))||
                        (y<3&&cardMap[x][y].equals(cardMap[x][y+1]))) {

                    complete = false;
                    break ALL;
                }
            }
        }

        if (complete) {
            Toast.makeText(getContext(), "游戏结束" + MainActivity.getMainActivity().getScore(), Toast.LENGTH_LONG).show();
        }
    }

设计总体上框架就是上面说的那些.

二.动画效果

动画效果主要是创建,移动,合并这三个效果,因此重写个继承FrameLayout的class,覆盖到游戏界面上,这样的目的可以通过MainActivity中实例化当前这个类,然后可以操作其方法,然后通过滑动来设置动画

public class AnimLayer extends FrameLayout {

    public AnimLayer(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public AnimLayer(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public AnimLayer(Context context) {
        super(context);
    }



    public void createMoveAnim(final Card from,final Card to,int fromX,int toX,int fromY,int toY){

        final Card c = getCard(from.getNum());

        LayoutParams lp = new LayoutParams(Config.CARD_WIDTH, Config.CARD_WIDTH);
        lp.leftMargin = fromX*Config.CARD_WIDTH;
        lp.topMargin = fromY*Config.CARD_WIDTH;
        c.setLayoutParams(lp);

        if (to.getNum()<=0) {
            to.getTvCard().setVisibility(View.INVISIBLE);
        }
        TranslateAnimation ta = new TranslateAnimation(0, Config.CARD_WIDTH*(toX-fromX), 0, Config.CARD_WIDTH*(toY-fromY));
        ta.setDuration(100);
        ta.setAnimationListener(new Animation.AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {}

            @Override
            public void onAnimationRepeat(Animation animation) {}

            @Override
            public void onAnimationEnd(Animation animation) {
                to.getTvCard().setVisibility(View.VISIBLE);
                recycleCard(c);
            }
        });
        c.startAnimation(ta);
    }

    private Card getCard(int num){
        Card c;
        if (cards.size()>0) {
            c = cards.remove(0);
        }else{
            c = new Card(getContext());
            addView(c);
        }
        c.setVisibility(View.VISIBLE);
        c.setNum(num);
        return c;
    }
    private void recycleCard(Card c){
        c.setVisibility(View.INVISIBLE);
        c.setAnimation(null);
        cards.add(c);
    }
    private List<Card> cards = new ArrayList<Card>();

    public void createScaleTo1(Card target){
        ScaleAnimation sa = new ScaleAnimation(0.1f, 1, 0.1f, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
        sa.setDuration(100);
        target.setAnimation(null);
        target.getTvCard().startAnimation(sa);
    }

}

最后主布局文件如下

<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:background="#fffaf8ef"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">
    <LinearLayout
        android:layout_marginTop="15dp"
        android:orientation="horizontal"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#ff776e65"
            android:text="@string/title"
            android:textSize="50sp"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:orientation="horizontal"
        android:layout_marginTop="10dp"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#ff776e65"
            android:layout_marginLeft="30dp"
            android:textSize="35sp"
            android:text="@string/Score"/>
        <TextView
            android:id="@+id/tvscore"
            android:layout_marginLeft="20dp"
            android:textSize="25sp"
            android:textColor="#ff776e65"
            android:layout_width="70dp"
            android:layout_height="37dp"
            />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/startgame"
            android:layout_marginLeft="40dp"
            android:background="#ffbbada0"
            android:textSize="15sp"
            android:text="@string/start"/>

    </LinearLayout>
    <FrameLayout
        android:id="@+id/gameContainer"
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
    <develop.niuli.com.game.GameView
        android:layout_marginTop="40dp"
        android:id="@+id/Gridlayout"
        android:layout_width="match_parent"
        android:background="#ffbbada0"
        android:layout_height="350dp">

    </develop.niuli.com.game.GameView>

    <develop.niuli.com.game.AnimLayer
        android:id="@+id/animLayer"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </develop.niuli.com.game.AnimLayer>

    </FrameLayout>

</LinearLayout>

备注:

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