Android 小游戏 2048

昨晚看到android的编程小游戏视频，一时兴起，就看了下，觉得介绍的好简单，觉得自己也可以试试，然后就尝试嘛，也是一个不错的体验。
编程就是拿来玩的，娱乐精神，服务精神，这就是coder的使命。

activity_main.xml
布局文件：GameView就是自定义的布局控件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout    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: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="com.game2048.MainActivity">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="srore"        android:id="@+id/textView"/>    <com.game2048.GameView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/gameview"        android:focusableInTouchMode="true">    </com.game2048.GameView></RelativeLayout>

GameView.java

package com.game2048;import android.content.Context;import android.graphics.Point;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.widget.GridLayout;import android.widget.Toast;import java.util.ArrayList;import java.util.List;/** * Created by zhouchenglin on 2016/4/27. */public class GameView extends GridLayout {    public GameView(Context context) {        super(context);        InitGameView();    }    public GameView(Context context, AttributeSet attrs) {        super(context, attrs);        InitGameView();    }    public GameView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        InitGameView();    }    private void InitGameView() {        //设置颜色和字体        setColumnCount(4);        setBackgroundColor(0xffbbada0);        setOnTouchListener(new View.OnTouchListener() {            float startX, startY, offsetX, offsetY;            //返回值flase只能响应keydown事件，每次触发都会重新执行函数            @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();                            } else if (offsetX > 5) {                                swipeRight();                            }                        } else {                            if (offsetY < -5) {                                swipeUp();                            } else if (offsetY > 5) {                                swipeDown();                            }                        }                        break;                }                return true;            }        });    }    private Card[][] cardsMap = new Card[4][4];    protected void onSizeChanged(int w, int h, int oldw, int oldh) {        super.onSizeChanged(w, h, oldw, oldh);        int cardWidth = (Math.min(w, h)) / 4;        addCards(cardWidth, cardWidth);        startGame();    }    public boolean finishGame(){        for(int i=0;i<4;i++){            for (int y=0;y<4;y++){                if(cardsMap[i][y].getNum()<=0){                    return false;                }            }        }//        Toast.makeText(getContext(),"已经完成游戏",Toast.LENGTH_SHORT).show();        return true;    }    public void addCards(int cardWidth, int cardHeight) {        Card c;        for (int y = 0; y < 4; y++) {            for (int x = 0; x < 4; x++) {                c = new Card(getContext());                c.setNum(3);                addView(c, cardWidth, cardHeight);                cardsMap[x][y] = c;            }        }    }    private List<Point> emptyPoints = new ArrayList<Point>();    // 添加随机数    private void addRandomNum() {        emptyPoints.clear();        for (int y = 0; y < 4; y++) {            for (int x = 0; x < 4; x++) {                //防止出现相同的随机数                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);    }    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 swipeLeft() {        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);                            break;                        } else if (cardsMap[x][y].equals(cardsMap[x1][y])) {                            cardsMap[x][y].setNum(cardsMap[x][y].getNum() * 2);                            cardsMap[x1][y].setNum(0);//                            addRandomNum();                            break;                        }                    }                }            }        }        if(finishGame())            return;        addRandomNum();    }    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);                            break;                        } else if (cardsMap[x][y].equals(cardsMap[x1][y])) {                            cardsMap[x][y].setNum(cardsMap[x][y].getNum() * 2);                            cardsMap[x1][y].setNum(0);//                            addRandomNum();                            break;                        }                    }                }            }        }        if(finishGame())            return;        addRandomNum();    }    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);                            break;                        } else if (cardsMap[x][y].equals(cardsMap[x][y1])) {                            cardsMap[x][y].setNum(cardsMap[x][y].getNum() * 2);                            cardsMap[x][y1].setNum(0);//                          addRandomNum();                            break;                        }                    }                }            }        }        if(finishGame())            return;        addRandomNum();    }    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);                            break;                        } else if (cardsMap[x][y].equals(cardsMap[x][y1])) {                            cardsMap[x][y].setNum(cardsMap[x][y].getNum() * 2);                            cardsMap[x][y1].setNum(0);//                            addRandomNum();                            break;                        }                    }                }            }        }        if(finishGame())            return;        addRandomNum();    }}

这里面主要是逻辑实现过程，代码拿来玩玩，主要这里面涉及得知识点：
判断滑动手势，逻辑结构，目前可能还有点问题，细节方面没有考虑很多，主要是玩玩。

Card.java
这个相当于将每个方格当成卡牌，在里面展示要显示的数据

package com.game2048;import android.content.Context;import android.util.AttributeSet;import android.view.Gravity;import android.widget.FrameLayout;import android.widget.TextView;/** * Created by zhouchenglin on 2016/4/27. */public class Card extends FrameLayout {    public Card(Context context) {        super(context);        initCard();    }    public Card(Context context, AttributeSet attrs) {        super(context, attrs);        initCard();    }    public Card(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        initCard();    }    //显示数字    private int num = 0;    //展示的文本框    private TextView label;    public int getNum() {        return this.num;    }    public void setNum(int num) {        this.num = num;        switch (num)        {            case 0:                label.setText("");                break;            case 2:                label.setTextColor(0xFFFFD700);                label.setText(String.valueOf(num));                break;            case 4:                label.setTextColor(0xffFF6347);                label.setText(String.valueOf(num));                break;            case 8:                label.setTextColor(0xffEED8AE);                label.setText(String.valueOf(num));                break;            case 16:                label.setTextColor(0xffEEC591);                label.setText(String.valueOf(num));                break;            case 32:                label.setTextColor(0xffEE9A00);                label.setText(String.valueOf(num));                break;            case 64:                label.setTextColor(0xffEE9A49);                label.setText(String.valueOf(num));                break;            case 128:                label.setTextColor(0xffEE7600);                label.setText(String.valueOf(num));                break;            case 256:                label.setTextColor(0xffEEEE00);                label.setText(String.valueOf(num));                break;            case 1024:                label.setTextColor(0xffEE2C2C);                label.setText(String.valueOf(num));                break;            case 2048:                label.setTextColor(0xffEE3B3B);                label.setText(String.valueOf(num));                break;            case 4096:                label.setTextColor(0xffDC143C);                label.setText(String.valueOf(num));                break;            default:                label.setText(String.valueOf(num));                break;        }    }    private void initCard() {        label = new TextView(getContext());        label.setTextSize(32);        label.setGravity(Gravity.CENTER);        label.setBackgroundColor(0x33ffffff);        //显示完全在布局里面；添加布局        LayoutParams lp = new LayoutParams(-1, -1);        lp.setMargins(10,10,10,10);        addView(label, lp);        setNum(2);    }    //判断两张卡片是否相等    public boolean equals(Card o) {        return getNum() == o.getNum();    }}

MainActivity.java,基本没改

package com.game2048;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }}

这个程序主要介绍的就是将自动添加控件到布局里面，而不是通过xml文件直接布局。

可能还需要逻辑上面需要在细化下，另外可能还需要设计下Ui的更新问题和游戏结束判断问题，这个我觉得可以开个子线程来做对应的处理。

其实有时候，编程就是这么有趣。