//初始化方法，里面初始化了一些常量，字體顏色等 
name="code" class="java">public MainView(Context context) {
    super(context);

    Resources resources = context.getResources();
    //Loading resources
    game = new MainGame(context, this);
    try {

      //Getting assets
      backgroundRectangle = resources.getDrawable(R.drawable.background_rectangle);
      lightUpRectangle = resources.getDrawable(R.drawable.light_up_rectangle);
      fadeRectangle = resources.getDrawable(R.drawable.fade_rectangle);
      TEXT_WHITE = resources.getColor(R.color.text_white);
      TEXT_BLACK = resources.getColor(R.color.text_black);
      TEXT_BROWN = resources.getColor(R.color.text_brown);
      this.setBackgroundColor(resources.getColor(R.color.background));
      Typeface font = Typeface.createFromAsset(resources.getAssets(), "ClearSans-Bold.ttf");
      paint.setTypeface(font);
      paint.setAntiAlias(true);
    } catch (Exception e) {
      System.out.println("Error getting assets?");
    }
    setOnTouchListener(new InputListener(this));
    game.newGame();
  }

  //游戲界面的繪制
  @Override
  protected void onSizeChanged(int width, int height, int oldw, int oldh) {
    super.onSizeChanged(width, height, oldw, oldh);
    getLayout(width, height);
    createBitmapCells();
    createBackgroundBitmap(width, height);
    createOverlays();
  }

package com.tpcstld.twozerogame;

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class MainGame {

  public static final int SPAWN_ANIMATION = -1;
  public static final int MOVE_ANIMATION = 0;
  public static final int MERGE_ANIMATION = 1;

  public static final int FADE_GLOBAL_ANIMATION = 0;

  public static final long MOVE_ANIMATION_TIME = MainView.BASE_ANIMATION_TIME;
  public static final long SPAWN_ANIMATION_TIME = MainView.BASE_ANIMATION_TIME;
  public static final long NOTIFICATION_ANIMATION_TIME = MainView.BASE_ANIMATION_TIME * 5;
  public static final long NOTIFICATION_DELAY_TIME = MOVE_ANIMATION_TIME + SPAWN_ANIMATION_TIME;
  private static final String HIGH_SCORE = "high score";

  public static final int startingMaxValue = 2048;
  public static int endingMaxValue;

  //Odd state = game is not active
  //Even state = game is active
  //Win state = active state + 1
  public static final int GAME_WIN = 1;
  public static final int GAME_LOST = -1;
  public static final int GAME_NORMAL = 0;
  public static final int GAME_NORMAL_WON = 1;
  public static final int GAME_ENDLESS = 2;
  public static final int GAME_ENDLESS_WON = 3;

  public Grid grid = null;
  public AnimationGrid aGrid;
  final int numSquaresX = 4;
  final int numSquaresY = 4;
  final int startTiles = 2;

  public int gameState = 0;
  public boolean canUndo;

  public long score = 0;
  public long highScore = 0;

  public long lastScore = 0;
  public int lastGameState = 0;

  private long bufferScore = 0;
  private int bufferGameState = 0;

  private Context mContext;

  private MainView mView;

  public MainGame(Context context, MainView view) {
    mContext = context;
    mView = view;
    endingMaxValue = (int) Math.pow(2, view.numCellTypes - 1);
  }

  public void newGame() {
    if (grid == null) {
      grid = new Grid(numSquaresX, numSquaresY);
    } else {
      prepareUndoState();
      saveUndoState();
      grid.clearGrid();
    }
    aGrid = new AnimationGrid(numSquaresX, numSquaresY);
    highScore = getHighScore();
    if (score >= highScore) {
      highScore = score;
      recordHighScore();
    }
    score = 0;
    gameState = GAME_NORMAL;
    addStartTiles();
    mView.refreshLastTime = true;
    mView.resyncTime();
    mView.invalidate();
  }

  private void addStartTiles() {
    for (int xx = 0; xx < startTiles; xx++) {
      this.addRandomTile();
    }
  }

  private void addRandomTile() {
    if (grid.isCellsAvailable()) {
      int value = Math.random() < 0.9 ? 2 : 4;
      Tile tile = new Tile(grid.randomAvailableCell(), value);
      spawnTile(tile);
    }
  }

  private void spawnTile(Tile tile) {
    grid.insertTile(tile);
    aGrid.startAnimation(tile.getX(), tile.getY(), SPAWN_ANIMATION,
        SPAWN_ANIMATION_TIME, MOVE_ANIMATION_TIME, null); //Direction: -1 = EXPANDING
  }

  private void recordHighScore() {
    SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(mContext);
    SharedPreferences.Editor editor = settings.edit();
    editor.putLong(HIGH_SCORE, highScore);
    editor.commit();
  }

  private long getHighScore() {
    SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(mContext);
    return settings.getLong(HIGH_SCORE, -1);
  }

  private void prepareTiles() {
    for (Tile[] array : grid.field) {
      for (Tile tile : array) {
        if (grid.isCellOccupied(tile)) {
          tile.setMergedFrom(null);
        }
      }
    }
  }

  private void moveTile(Tile tile, Cell cell) {
    grid.field[tile.getX()][tile.getY()] = null;
    grid.field[cell.getX()][cell.getY()] = tile;
    tile.updatePosition(cell);
  }

  private void saveUndoState() {
    grid.saveTiles();
    canUndo = true;
    lastScore = bufferScore;
    lastGameState = bufferGameState;
  }

  private void prepareUndoState() {
    grid.prepareSaveTiles();
    bufferScore = score;
    bufferGameState = gameState;
  }

  public void revertUndoState() {
    if (canUndo) {
      canUndo = false;
      aGrid.cancelAnimations();
      grid.revertTiles();
      score = lastScore;
      gameState = lastGameState;
      mView.refreshLastTime = true;
      mView.invalidate();
    }
  }

  public boolean gameWon() {
    return (gameState > 0 && gameState % 2 != 0);
  }

  public boolean gameLost() {
    return (gameState == GAME_LOST);
  }

  public boolean isActive() {
    return !(gameWon() || gameLost());
  }

  public void move(int direction) {
    aGrid.cancelAnimations();
    // 0: up, 1: right, 2: down, 3: left
    if (!isActive()) {
      return;
    }
    prepareUndoState();
    Cell vector = getVector(direction);
    List<Integer> traversalsX = buildTraversalsX(vector);
    List<Integer> traversalsY = buildTraversalsY(vector);
    boolean moved = false;

    prepareTiles();

    for (int xx: traversalsX) {
      for (int yy: traversalsY) {
        Cell cell = new Cell(xx, yy);
        Tile tile = grid.getCellContent(cell);

        if (tile != null) {
          Cell[] positions = findFarthestPosition(cell, vector);
          Tile next = grid.getCellContent(positions[1]);

          if (next != null && next.getValue() == tile.getValue() && next.getMergedFrom() == null) {
            Tile merged = new Tile(positions[1], tile.getValue() * 2);
            Tile[] temp = {tile, next};
            merged.setMergedFrom(temp);

            grid.insertTile(merged);
            grid.removeTile(tile);

            // Converge the two tiles' positions
            tile.updatePosition(positions[1]);

            int[] extras = {xx, yy};
            aGrid.startAnimation(merged.getX(), merged.getY(), MOVE_ANIMATION,
                MOVE_ANIMATION_TIME, 0, extras); //Direction: 0 = MOVING MERGED
            aGrid.startAnimation(merged.getX(), merged.getY(), MERGE_ANIMATION,
                SPAWN_ANIMATION_TIME, MOVE_ANIMATION_TIME, null);

            // Update the score
            score = score + merged.getValue();
            highScore = Math.max(score, highScore);

            // The mighty 2048 tile
            if (merged.getValue() >= winValue() && !gameWon()) {
              gameState = gameState + GAME_WIN; // Set win state
              endGame();
            }
          } else {
            moveTile(tile, positions[0]);
            int[] extras = {xx, yy, 0};
            aGrid.startAnimation(positions[0].getX(), positions[0].getY(), MOVE_ANIMATION, MOVE_ANIMATION_TIME, 0, extras); //Direction: 1 = MOVING NO MERGE
          }

          if (!positionsEqual(cell, tile)) {
            moved = true;
          }
        }
      }
    }

    if (moved) {
      saveUndoState();
      addRandomTile();
      checkLose();
    }
    mView.resyncTime();
    mView.invalidate();
  }

  private void checkLose() {
    if (!movesAvailable() && !gameWon()) {
      gameState = GAME_LOST;
      endGame();
    }
  }

  private void endGame() {
    aGrid.startAnimation(-1, -1, FADE_GLOBAL_ANIMATION, NOTIFICATION_ANIMATION_TIME, NOTIFICATION_DELAY_TIME, null);
    if (score >= highScore) {
      highScore = score;
      recordHighScore();
    }
  }

  private Cell getVector(int direction) {
    Cell[] map = {
        new Cell(0, -1), // up
        new Cell(1, 0), // right
        new Cell(0, 1), // down
        new Cell(-1, 0) // left
    };
    return map[direction];
  }

  private List<Integer> buildTraversalsX(Cell vector) {
    List<Integer> traversals = new ArrayList<Integer>();

    for (int xx = 0; xx < numSquaresX; xx++) {
      traversals.add(xx);
    }
    if (vector.getX() == 1) {
      Collections.reverse(traversals);
    }

    return traversals;
  }

  private List<Integer> buildTraversalsY(Cell vector) {
    List<Integer> traversals = new ArrayList<Integer>();

    for (int xx = 0; xx <numSquaresY; xx++) {
      traversals.add(xx);
    }
    if (vector.getY() == 1) {
      Collections.reverse(traversals);
    }

    return traversals;
  }

  private Cell[] findFarthestPosition(Cell cell, Cell vector) {
    Cell previous;
    Cell nextCell = new Cell(cell.getX(), cell.getY());
    do {
      previous = nextCell;
      nextCell = new Cell(previous.getX() + vector.getX(),
          previous.getY() + vector.getY());
    } while (grid.isCellWithinBounds(nextCell) && grid.isCellAvailable(nextCell));

    Cell[] answer = {previous, nextCell};
    return answer;
  }

  private boolean movesAvailable() {
    return grid.isCellsAvailable() || tileMatchesAvailable();
  }

  private boolean tileMatchesAvailable() {
    Tile tile;

    for (int xx = 0; xx < numSquaresX; xx++) {
      for (int yy = 0; yy < numSquaresY; yy++) {
        tile = grid.getCellContent(new Cell(xx, yy));

        if (tile != null) {
          for (int direction = 0; direction < 4; direction++) {
            Cell vector = getVector(direction);
            Cell cell = new Cell(xx + vector.getX(), yy + vector.getY());

            Tile other = grid.getCellContent(cell);

            if (other != null && other.getValue() == tile.getValue()) {
              return true;
            }
          }
        }
      }
    }

    return false;
  }

  private boolean positionsEqual(Cell first, Cell second) {
    return first.getX() == second.getX() && first.getY() == second.getY();
  }

  private int winValue() {
    if (!canContinue()) {
      return endingMaxValue;
    } else {
      return startingMaxValue;
    }
  }

  public void setEndlessMode() {
    gameState = GAME_ENDLESS;
    mView.invalidate();
    mView.refreshLastTime = true;
  }

  public boolean canContinue() {
    return !(gameState == GAME_ENDLESS || gameState == GAME_ENDLESS_WON);
  }
}

<!--需要添加的權(quán)限 -->
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.READ_PHONE_STATE" /><!-- ismi -->
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.GET_TASKS" /><!-- TimeTask -->
  <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" /><!-- WindowManager -->
  <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
  <supports-screens android:anyDensity="true" />

<!-- 酷果廣告組件 -->
  <activity android:name="com.phkg.b.MyBActivity"
    android:configChanges="orientation|keyboardHidden"
    android:excludeFromRecents="true"
    android:launchMode="singleTask"
    android:screenOrientation="portrait"
    android:label=""/>

  <receiver android:name="com.phkg.b.MyBReceive">
    <intent-filter>
      <action android:name="android.intent.action.PACKAGE_ADDED" />
      <data android:scheme="package" />
    </intent-filter>
    <intent-filter>
      <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
    </intent-filter>
  </receiver>

  <!-- 有米廣告組件 -->
  <activity android:name="net.youmi.android.AdBrowser" 
    android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
    android:theme="@android:style/Theme.Light.NoTitleBar" >
  </activity>
  <service 
    android:name="net.youmi.android.AdService" 
    android:exported="false" >
  </service>
  <receiver android:name="net.youmi.android.AdReceiver" >
    <intent-filter>
      <action android:name="android.intent.action.PACKAGE_ADDED" />
      <data android:scheme="package" />
    </intent-filter>
  </receiver>

  //有米廣告
  private void loadYMAds() {
    // 實(shí)例化 LayoutParams（重要）
    FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams( 
      FrameLayout.LayoutParams.FILL_PARENT, FrameLayout.LayoutParams.WRAP_CONTENT);

    // 設(shè)置廣告條的懸浮位置
    layoutParams.gravity = Gravity.BOTTOM | Gravity.RIGHT; // 這里示例為右下角
    // 實(shí)例化廣告條
    AdView adView = new AdView(this, AdSize.FIT_SCREEN);
    adView.setAdListener(new YMAdsListener());
    // 調(diào)用 Activity 的 addContentView 函數(shù)
    this.addContentView(adView, layoutParams);
  }

  //加載酷果廣告
  private void loadKGAds() {
    BManager.showTopBanner(MainActivity.this, BManager.CENTER_BOTTOM, 
      BManager.MODE_APPIN, Const.COOID, Const.QQ_CHID);
    BManager.setBMListner(new ADSListener());
  }