1. 概述

1.1 項目背景

近年來隨著手機技術的不斷發(fā)展古老的貪吃蛇游戲不能給與廣大青少年的良好游戲體驗盗扒，所以本文再基于古老的貪吃蛇游戲上對游戲進行了改進使得玩法更加多樣有趣。

1.2 研究的主要內(nèi)容

研究的主要內(nèi)容包括對蛇如何進行控制，實現(xiàn)食物的隨機生成，并且對蛇可以進行加速控制橙弱。游戲得分等

2. 相關技術

采用的技術有 多線程 自定義View 以及一個activity

3. 系統(tǒng)分析

此為一個新版的貪吃蛇游戲，設計的游戲需要蛇的移動锅锨、加速敛苇、增長妆绞、死亡功能。程文件主要包括src文件夾（Java源碼）枫攀、res文件夾（資源文件）和AndroidMainfest.xml（程序清單）括饶。軟件主要由Activities，自定義view 組成 View主要用來繪制圖形并進行邏輯的處理来涨。Activity主要實現(xiàn)對蛇的控制和對用戶的交互信息等

4. 系統(tǒng)設計

圖1游戲組成

5. 系統(tǒng)實現(xiàn)

1图焰、游戲界面

圖2開始界面

圖3

圖4暫停界面

圖5結束界面

圖6穿墻界面

實現(xiàn)該模塊的核心代碼如下：

TileView.java

package cn.edu.zust.lihuan;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
public class TileView extends View {
    protected static int mTileSize;
    protected static int mXTileCount;
    protected static int mYTileCount;
    private static int mXOffset;
    private static int mYOffset;
    private Bitmap[] mTileArray;
    private int[][] mTileGrid;
    private final Paint mPaint = new Paint();
    public TileView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.TileView);

        mTileSize = a.getInt(R.styleable.TileView_tileSize, 32);

        a.recycle();
    }
    public TileView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
    public void resetTiles(int tilecount) {
        mTileArray = new Bitmap[tilecount];
    }
    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        mXTileCount = (int) Math.floor(w / mTileSize);
        mYTileCount = (int) Math.floor(h / mTileSize);

        mXOffset = ((w - (mTileSize * mXTileCount)) / 2);
        mYOffset = ((h - (mTileSize * mYTileCount)) / 2);

        mTileGrid = new int[mXTileCount][mYTileCount];
        clearTiles();
    }
    public void loadTile(int key, Drawable tile) {
        Bitmap bitmap = Bitmap.createBitmap(mTileSize, mTileSize, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        tile.setBounds(0, 0, mTileSize, mTileSize);
        tile.draw(canvas);

        mTileArray[key] = bitmap;
    }
    public void clearTiles() {
        for (int x = 0; x < mXTileCount; x++) {
            for (int y = 0; y < mYTileCount; y++) {
                setTile(0, x, y);
            }
        }
    }
    public void setTile(int tileindex, int x, int y) {
        mTileGrid[x][y] = tileindex;
    }
    @Override
    public void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        for (int x = 0; x < mXTileCount; x += 1) {
            for (int y = 0; y < mYTileCount; y += 1) {
                if (mTileGrid[x][y] > 0) {
                    canvas.drawBitmap(mTileArray[mTileGrid[x][y]],
                            mXOffset + x * mTileSize,
                            mYOffset + y * mTileSize,
                            mPaint);
                }
            }
        }

    }

}

Snake.java

package cn.edu.zust.lihuan;
import android.app.Activity;
import android.content.res.Resources;
import android.os.Bundle;
import android.os.Vibrator;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.TextView;
import static android.view.MotionEvent.ACTION_DOWN;
import static android.view.MotionEvent.ACTION_UP;
public class   Snake extends Activity {
    private SnakeView mSnakeView;
    private Button mBt_up, mBt_down, mBt_left, mBt_right, mBt_home;
    private Vibrator vibrator;
    private Resources r;
    private static String ICICLE_KEY = "snake-view";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(cn.edu.zust.lihuan.R.layout.snake_layout);
        mSnakeView = (SnakeView) findViewById(cn.edu.zust.lihuan.R.id.snake);
        mSnakeView.setTextView((TextView) findViewById(cn.edu.zust.lihuan.R.id.text));
        vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
        r = getResources();
        if (savedInstanceState == null) {
            mSnakeView.setMode(SnakeView.READY);
        } else {
            Bundle map = savedInstanceState.getBundle(ICICLE_KEY);
            if (map != null) {
                mSnakeView.restoreState(map);
            } else {
                mSnakeView.setMode(SnakeView.PAUSE);
                mSnakeView.setMODE(SnakeView.PAUSE);
            }
        }
        mBt_up = findViewById(cn.edu.zust.lihuan.R.id.up);
        mBt_down = findViewById(cn.edu.zust.lihuan.R.id.dowm);
        mBt_left = findViewById(cn.edu.zust.lihuan.R.id.left);
        mBt_right = findViewById(cn.edu.zust.lihuan.R.id.right);
        mBt_home = findViewById(cn.edu.zust.lihuan.R.id.home);
        mBt_up.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                switch (motionEvent.getAction()) {
                    case ACTION_DOWN:
                        mSnakeView.up();
                        vibrator.vibrate(30);
                        mSnakeView.addBuff();
                        break;
                    case ACTION_UP:
                        mSnakeView.deBuff();
                        break;
                }
                return false;
            }
        });
        mBt_down.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                switch (motionEvent.getAction()) {
                    case ACTION_DOWN:
                        mSnakeView.down();
                        vibrator.vibrate(30);
                        mSnakeView.addBuff();
                        break;
                    case ACTION_UP:
                        mSnakeView.deBuff();
                        break;
                }
                return false;
            }
        });
        mBt_left.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                switch (motionEvent.getAction()) {
                    case ACTION_DOWN:
                        mSnakeView.left();
                        vibrator.vibrate(30);
                        mSnakeView.addBuff();
                        break;
                    case ACTION_UP:
                        mSnakeView.deBuff();
                        break;
                }
                return false;
            }
        });
        mBt_right.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                switch (motionEvent.getAction()) {
                    case ACTION_DOWN:
                        mSnakeView.right();
                        vibrator.vibrate(30);
                        mSnakeView.addBuff();
                        break;
                    case ACTION_UP:
                        mSnakeView.deBuff();
                        break;
                }
                return false;
            }
        });
        mBt_home.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                changeHome();
                mSnakeView.star();
                vibrator.vibrate(300);
            }
        });
    }
    @Override
    protected void onPause() {
        super.onPause();
        // Pause the game along with the activity
        mSnakeView.setMode(SnakeView.PAUSE);
        changeHome();
        mSnakeView.setMODE(SnakeView.PAUSE);
    }
    @Override
    public void onSaveInstanceState(Bundle outState) {
        //Store the game state
        outState.putBundle(ICICLE_KEY, mSnakeView.saveState());
    }
    public void changeHome() {
        if (r != null) {
            if (mSnakeView.getMODE() == mSnakeView.PAUSE ||
                    mSnakeView.getMODE() == mSnakeView.READY || mSnakeView.getMODE() == mSnakeView.LOSE) {
                mBt_home.setBackground(r.getDrawable(R.drawable.btn_bg_home_selector));
            } else if (mSnakeView.getMODE() == mSnakeView.RUNNING) {
                mBt_home.setBackground(r.getDrawable(R.drawable.btn_bg_home2_selector));
            }
        } else {
        }
    }
}

SnakeView.java

 
package cn.edu.zust.lihuan;

import android.content.Context;
import android.content.res.Resources;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.Random;

public class SnakeView extends TileView {
    private static final String TAG = "SnakeView";
    private int mMode = READY;
    public static final int PAUSE = 0;
    public static final int READY = 1;
    public static final int RUNNING = 2;
    public static final int LOSE = 3;
    private int mDirection = NORTH;
    private int mNextDirection = NORTH;
    private static final int NORTH = 1;
    private static final int SOUTH = 2;
    private static final int EAST = 3;
    private static final int WEST = 4;
    private static final int APPLE = 1;
    private static final int HEAD = 2;
    private static final int DEADHEAD = 3;
    private static final int BODY = 4;
    private static final int APPLE2 = 5;
    private static int MODE = READY;

    public static void setMODE(int MODE) {
        SnakeView.MODE = MODE;
    }

    public int getMODE() {
        return MODE;
    }

    private long mScore = 0;
    private long mMoveDelay = 100;
    private boolean mBuff = false;
    private int gorwTag = 1;

    /**
     * Give our snake some buff!
     */
    public void addBuff() {
        if (!mBuff) {
            mBuff = true;
            mMoveDelay /= 5;
            loadTile(APPLE2, r.getDrawable(R.drawable.redstar));

        }
    }

    public void deBuff() {
        if (mBuff) {
            mBuff = false;
            mMoveDelay *= 5;
        }
        loadTile(APPLE2, r.getDrawable(R.drawable.greenstar));
    }

    private long mLastMove;
    private TextView mStatusText;
    private ArrayList<Coordinate> mSnakeTrail = new ArrayList<Coordinate>();
    private ArrayList<Coordinate> mAppleList = new ArrayList<Coordinate>();
    private ArrayList<Coordinate> mAppleList2 = new ArrayList<Coordinate>();
    /**
     * Everyone needs a little randomness in their life
     */
    private static final Random RNG = new Random();
    private RefreshHandler mRedrawHandler = new RefreshHandler();
    Resources r = this.getContext().getResources();

    class RefreshHandler extends Handler {
        @Override
        public void handleMessage(Message msg) {
            SnakeView.this.update();
            SnakeView.this.invalidate();
        }

        public void sleep(long delayMillis) {
            this.removeMessages(0);
            //     Toast.makeText(SnakeView.this.getContext(),"這是一個TOAST",Toast.LENGTH_SHORT).show();
            sendMessageDelayed(obtainMessage(0), delayMillis);
        }
    }

    public SnakeView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

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

    private void initSnakeView() {
        setFocusable(true);
        resetTiles(6);
        loadTile(HEAD, r.getDrawable(cn.edu.zust.lihuan.R.drawable.head));
        loadTile(APPLE, r.getDrawable(cn.edu.zust.lihuan.R.drawable.apple));
        loadTile(BODY, r.getDrawable(cn.edu.zust.lihuan.R.drawable.body));
        loadTile(DEADHEAD, r.getDrawable(cn.edu.zust.lihuan.R.drawable.deadhead));
        loadTile(APPLE2, r.getDrawable(R.drawable.redstar));
    }

    private void initNewGame() {
        mSnakeTrail.clear();
        mAppleList.clear();
        mAppleList2.clear();
        gorwTag = 1;
        // that's just turned north
        for (int i = 4; i > 0; i--) {
            mSnakeTrail.add(new Coordinate(i, 7));
        }
        mNextDirection = NORTH;
        // How many apples to start with
        for (int i = 0; i < 100; i++) {
            addRandomApple();
        }
        for (int i = 0; i < 5; i++) {
            addRandomApple2();
        }
        //init time of snake
        mMoveDelay = 300;
        mScore = 0;
    }

    private int[] coordArrayListToArray(ArrayList<Coordinate> cvec) {
        int count = cvec.size();
        int[] rawArray = new int[count * 2];
        for (int index = 0; index < count; index++) {
            Coordinate c = cvec.get(index);
            rawArray[2 * index] = c.x;
            rawArray[2 * index + 1] = c.y;
        }
        return rawArray;
    }

    public Bundle saveState() {
        Bundle map = new Bundle();
        map.putIntArray("mAppleList", coordArrayListToArray(mAppleList));
        map.putIntArray("mAppleList2", coordArrayListToArray(mAppleList2));
        map.putInt("mDirection", Integer.valueOf(mDirection));
        map.putInt("mNextDirection", Integer.valueOf(mNextDirection));
        map.putLong("mMoveDelay", Long.valueOf(mMoveDelay));
        map.putLong("mScore", Long.valueOf(mScore));
        map.putIntArray("mSnakeTrail", coordArrayListToArray(mSnakeTrail));
        return map;
    }

    private ArrayList<Coordinate> coordArrayToArrayList(int[] rawArray) {
        ArrayList<Coordinate> coordArrayList = new ArrayList<Coordinate>();
        int coordCount = rawArray.length;
        for (int index = 0; index < coordCount; index += 2) {
            Coordinate c = new Coordinate(rawArray[index], rawArray[index + 1]);
            coordArrayList.add(c);
        }
        return coordArrayList;
    }

    public void restoreState(Bundle icicle) {
        setMode(PAUSE);
        mAppleList = coordArrayToArrayList(icicle.getIntArray("mAppleList"));
        mAppleList2 = coordArrayToArrayList(icicle.getIntArray("mAppleList2"));
        mDirection = icicle.getInt("mDirection");
        mNextDirection = icicle.getInt("mNextDirection");
        mMoveDelay = icicle.getLong("mMoveDelay");
        mScore = icicle.getLong("mScore");
        mSnakeTrail = coordArrayToArrayList(icicle.getIntArray("mSnakeTrail"));
    }

    public void star() {
        if (mMode == READY | mMode == LOSE) {
            initNewGame();
            setMode(RUNNING);
            this.MODE = RUNNING;
            update();
        } else if (mMode == PAUSE) {
            setMode(RUNNING);
            this.MODE = RUNNING;
            update();
        } else if (mMode == RUNNING) {
            setMode(PAUSE);
            this.MODE = PAUSE;
            update();
        }
    }

    public void up() {
        if (mDirection != SOUTH) {
            mNextDirection = NORTH;
            loadTile(HEAD, r.getDrawable(R.drawable.head));
        }
    }

    public void down() {
        if (mDirection != NORTH) {
            mNextDirection = SOUTH;
            loadTile(HEAD, r.getDrawable(R.drawable.head2));
        }
    }

    public void left() {
        if (mDirection != EAST) {
            mNextDirection = WEST;
            loadTile(HEAD, r.getDrawable(R.drawable.head3));
        }
    }

    public void right() {
        if (mDirection != WEST) {
            mNextDirection = EAST;
            loadTile(HEAD, r.getDrawable(R.drawable.head4));
        }
    }

    public void setTextView(TextView newView) {
        mStatusText = newView;
    }

    public void setMode(int newMode) {
        int oldMode = mMode;
        mMode = newMode;

        if (newMode == RUNNING & oldMode != RUNNING) {
            mStatusText.setVisibility(View.INVISIBLE);
            update();
            return;
        }
        Resources res = getContext().getResources();
        CharSequence str = "";
        if (newMode == PAUSE) {
            str = res.getText(cn.edu.zust.lihuan.R.string.mode_pause);
        }
        if (newMode == READY) {
            str = res.getText(cn.edu.zust.lihuan.R.string.mode_ready);
        }
        if (newMode == LOSE) {
            str = res.getString(cn.edu.zust.lihuan.R.string.mode_lose_prefix) + mScore
                    + res.getString(cn.edu.zust.lihuan.R.string.mode_lose_suffix);
        }

        mStatusText.setText(str);
        mStatusText.setVisibility(View.VISIBLE);
    }

    private void addRandomApple() {
        Coordinate newCoord = null;
        boolean found = false;
        while (!found) {
            // Choose a new location for our apple
            int newX = 1 + RNG.nextInt(mXTileCount - 2);
            int newY = 1 + RNG.nextInt(mYTileCount - 2);
            newCoord = new Coordinate(newX, newY);
            // Make sure it's not already under the snake
            boolean collision = false;
            int snakelength = mSnakeTrail.size();
            for (int index = 0; index < snakelength; index++) {
                if (mSnakeTrail.get(index).equals(newCoord)) {
                    collision = true;
                }
            }
            found = !collision;
        }
        if (newCoord == null) {
            Log.e(TAG, "Somehow ended up with a null newCoord!");
        }
        mAppleList.add(newCoord);
    }

    private void addRandomApple2() {
        Coordinate newCoord = null;
        boolean found = false;
        while (!found) {
            int newX = 1 + RNG.nextInt(mXTileCount - 2);
            int newY = 1 + RNG.nextInt(mYTileCount - 2);
            newCoord = new Coordinate(newX, newY);
            boolean collision = false;
            int snakelength = mSnakeTrail.size();
            for (int index = 0; index < snakelength; index++) {
                if (mSnakeTrail.get(index).equals(newCoord)) {
                    collision = true;
                }
            }
            found = !collision;
        }
        if (newCoord == null) {
            Log.e(TAG, "Somehow ended up with a null newCoord!");
        }
        mAppleList2.add(newCoord);
    }

    public void update() {
        if (mMode == RUNNING) {
            long now = System.currentTimeMillis();
            if (now - mLastMove > mMoveDelay) {
                clearTiles();
                updateWalls();
                updateSnake();
                updateApples();
                updateApples2();
                mLastMove = now;
            }
            mRedrawHandler.sleep(mMoveDelay);
        }
    }

    private void updateWalls() {
        for (int x = 0; x < mXTileCount; x++) {
            setTile(DEADHEAD, x, 0);
            setTile(DEADHEAD, x, mYTileCount - 1);
        }
        for (int y = 1; y < mYTileCount - 1; y++) {
            setTile(DEADHEAD, 0, y);
            setTile(DEADHEAD, mXTileCount - 1, y);
        }
    }

    private void updateApples() {
        for (Coordinate c : mAppleList) {
            setTile(APPLE, c.x, c.y);
        }
    }

    private void updateApples2() {
        for (Coordinate c : mAppleList2) {
            setTile(APPLE2, c.x, c.y);
        }
    }

    private void updateSnake() {
        boolean growSnake = false;
        // grab the snake by the head
        Coordinate head = mSnakeTrail.get(0);
        Coordinate newHead = new Coordinate(1, 1);
        mDirection = mNextDirection;
        switch (mDirection) {
            case EAST: {
                newHead = new Coordinate(head.x + 1, head.y);
                break;
            }
            case WEST: {
                newHead = new Coordinate(head.x - 1, head.y);
                break;
            }
            case NORTH: {
                newHead = new Coordinate(head.x, head.y - 1);
                break;
            }
            case SOUTH: {
                newHead = new Coordinate(head.x, head.y + 1);
                break;
            }
        }
        if ((newHead.x < 1) || (newHead.x > mXTileCount - 2)
                ) {
            setMode(LOSE);
            return;

        } else if (newHead.y == 0) {//穿上面的墻

            newHead.y = mYTileCount - 2;
        } else if (newHead.y == mYTileCount - 1) {//穿下面的墻

            newHead.y = 1;
        }
        int snakelength = mSnakeTrail.size();
        for (int snakeindex = 0; snakeindex < snakelength; snakeindex++) {
            Coordinate c = mSnakeTrail.get(snakeindex);
            if (c.equals(newHead)) {
                setMode(LOSE);
                return;
            }
        }
        int applecount = mAppleList.size();
        int applecount2 = mAppleList2.size();
        for (int appleindex = 0; appleindex < applecount; appleindex++) {
            Coordinate c = mAppleList.get(appleindex);
            if (c.equals(newHead)) {
                mAppleList.remove(c);
                addRandomApple();
                mScore++;
                mMoveDelay *= 0.998;
                growSnake = true;
            }
        }
        for (int appleindex = 0; appleindex < applecount2; appleindex++) {
            Coordinate c = mAppleList2.get(appleindex);
            if (c.equals(newHead)) {
                gorwTag = 2;
                mAppleList2.remove(c);
                addRandomApple2();
                mScore += 5;
                //chenge time of snake
                mMoveDelay *= 0.998;
                growSnake = true;
            }
        }
        switch (gorwTag) {
            case 1:
                mSnakeTrail.add(0, newHead);
                break;

            case 2:
                for (int i = 0; i < 4; i++) {
                    mSnakeTrail.add(0, newHead);
                }
                gorwTag = 1;
                for (int i = 0; i < 4; i++) {
                    updateSnake();
                }
                break;
            default:
                break;
        }
        if (!growSnake) {
            mSnakeTrail.remove(mSnakeTrail.size() - 1);
        }
        // draw snake
        int index = 0;
        for (Coordinate c : mSnakeTrail) {
            if (index == 0) {
                setTile(HEAD, c.x, c.y);
            } else {
                setTile(BODY, c.x, c.y);
            }
            index++;
        }

    }

    private class Coordinate {
        public int x;
        public int y;

        public Coordinate(int newX, int newY) {
            x = newX;
            y = newY;
        }

        public boolean equals(Coordinate other) {
            if (x == other.x && y == other.y) {
                return true;
            }
            return false;
        }

        @Override
        public String toString() {
            return "Coordinate: [" + x + "," + y + "]";
        }
    }

}

snake_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:lh="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1.5">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"></RelativeLayout>

        <TextView
            android:id="@+id/text"
            android:layout_width="match_parent"
            android:layout_height="300dp"
            android:layout_centerInParent="true"
            android:gravity="center_horizontal"
            android:text="@string/snake_layout_text_text"
            android:textColor="#ff8888ff"
            android:textSize="36sp"
            android:visibility="visible" />

        <cn.edu.zust.lihuan.SnakeView
            android:id="@+id/snake"
            android:layout_width="match_parent"
            android:layout_height="400dp"
            lh:tileSize="30" />


    </FrameLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:orientation="vertical">

        <Button
            android:id="@+id/up"
            android:layout_width="90dp"
            android:layout_height="1dp"
            android:layout_gravity="center_horizontal"
            android:layout_weight="1"
            android:layout_marginTop="5dp"
            android:background="@drawable/btn_bg_up_selector" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:orientation="horizontal">

            <Button
                android:id="@+id/left"
                android:layout_width="0dp"
                android:layout_height="90dp"
                android:layout_marginLeft="25dp"
                android:layout_weight="1"
                android:background="@drawable/btn_bg_left_selector"


                />

            <Button
                android:id="@+id/home"
                android:layout_width="0dp"
                android:layout_height="90dp"
                android:layout_weight="1"
                android:background="@drawable/btn_bg_home2_selector" />

            <Button
                android:id="@+id/right"
                android:layout_width="0dp"
                android:layout_height="90dp"
                android:layout_marginRight="25dp"
                android:layout_weight="1"
                android:background="@drawable/btn_bg_right_selector" />

        </LinearLayout>

        <Button
            android:id="@+id/dowm"
            android:layout_width="90dp"
            android:layout_height="0dp"
            android:layout_gravity="center_horizontal"
            android:layout_weight="1"
            android:layout_marginBottom="1dp"
            android:background="@drawable/btn_bg_down_selector"

            />

    </LinearLayout>

</LinearLayout>

6. 總結

在程序設計的時候喜歡將界面與處理分開，這樣降低耦合性蹦掐，易于維護擴展技羔。UI和游戲邏輯進行了分離僵闯， 它的實現(xiàn)方式就是，用父類TileView來實現(xiàn)比較基礎的界面UI部分藤滥，而TileView類的子類SnakeView類完成了游戲控制邏輯部分鳖粟，這樣 就成功的將兩者進行了分離，對后面的擴展和維護奠定了良好的基礎拙绊。

github源碼地址