Android Open Source - tic-tac-toe Game

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License

The source code is released under:

Copyright (c) 2009 Florida State University. All rights reserved. Developed by: FSU Android Group Florida State University http://www.cs.fsu.edu Permission is hereby gra...

Java Source Code

package fsu.android.tictactoe;
/*from w ww . j a va 2s. c om*/
import android.app.Activity;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.view.View;
import android.view.animation.Animation;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;


/* animated button class */
class AnimatedButton {
  
  public ImageButton button;    /* which button we control */
  Game the_game;      /* refernce to the game object */
  int cell_number;    /* which cell do I refer to */
  boolean taken;      /* each cell can only be taken once */
  
  static Object animation_mutex = new Object( );
  
  /* callback handler */
  final Handler animation_handler = new Handler( );
  
  /* runnable for posting refresh messages */
  final Runnable update_gui = new Runnable() {
      public void run() {
        setImage( );
      }
  };

  /* how long to hold each image */
  static final long DELAY_MS = 125;
  
  /* which stage each animation is on */
  int stage;
  
  /* X goes first, so we know which turn is which */
  static int global_turn = 0;
  
  int turn;
  
  public void setImage( ) {
    if((turn % 2) == 0) {
      switch(stage) {
        case 0: button.setImageResource(R.drawable.x0); break;
        case 1:  button.setImageResource(R.drawable.x1);  break;
        case 2:  button.setImageResource(R.drawable.x2);  break;
        case 3: button.setImageResource(R.drawable.x3); break;
        case 4:  button.setImageResource(R.drawable.x4);  break;
        case 5:  button.setImageResource(R.drawable.x5);  break;
        case 6: button.setImageResource(R.drawable.x6); break;
        case 7:  button.setImageResource(R.drawable.x7);  break;
      }
    } else {
      switch(stage) {
        case 0:  button.setImageResource(R.drawable.o0);  break;
        case 1:  button.setImageResource(R.drawable.o1);  break;
        case 2:  button.setImageResource(R.drawable.o2);  break;
        case 3:  button.setImageResource(R.drawable.o3);  break;
        case 4:  button.setImageResource(R.drawable.o4);  break;
        case 5:  button.setImageResource(R.drawable.o5);  break;
        case 6:  button.setImageResource(R.drawable.o6);  break;
        case 7:  button.setImageResource(R.drawable.o7);  break;
    }
    }
  }
  
  AnimatedButton(ImageButton b, Game g, int cell) {
    /* store references */
    button = b;
    the_game = g;
    cell_number = cell;
    global_turn = 0;
    taken = false;
    
    /* event handler */
    button.setOnClickListener(new Button.OnClickListener( ) {
            public void onClick(View v) {
              /* prevent double takes */
              if(taken) {
                the_game.status.setText("This Cell is Already Taken");
                return;
              }
              taken = true;
              
              /* Fire off a thread to do animation */
              synchronized(animation_mutex) {
            /* next players turn */
            turn = global_turn;
            global_turn++;
            
                Thread animation_thread = new Thread() {
                  public void run() {                     
                    /* run the animation */
                    for(stage = 0; stage<8; stage++) {
                      animation_handler.post(update_gui);
                      SystemClock.sleep(DELAY_MS);
                    }
                  }
                };                
                animation_thread.start();
                
                /* update the game */
                the_game.update(cell_number, turn);
              }
            }
        });
  }
}


public class Game extends Activity {
  
  /* number of players */
  int num_players;
  
  enum Cell {
    OPEN,
    X,
    O
  }
  
  enum Outcome {
    NONE,
    P1_WON,
    P2_WON,
    COMPUTER_WON,
    CAT
  }
  
  private Cell [] cells;
  
  public void setupGame( ) {
    cells = new Cell [9];
    
    for(int i=0; i<9; i++) {
      cells[i] = Cell.OPEN;
    }
  }
  
  public boolean checkTriple(int c1, int c2, int c3, Cell value) {
    if((cells[c1] == cells[c2]) && (cells[c2] == cells[c3]) && (cells[c3] == value))
      return true;
    else
      return false;
  }
  
  public Outcome checkGame( ) {
    /* I wish Java had macros :( */
    
    /* top row */
    if(checkTriple(0, 1, 2, Cell.X)) return Outcome.P1_WON;
    else if(checkTriple(0, 1, 2, Cell.O)) {
      return (num_players == 1) ? Outcome.COMPUTER_WON : Outcome.P2_WON;
    }
    
    /* middle row */
    if(checkTriple(3, 4, 5, Cell.X)) return Outcome.P1_WON;
    else if(checkTriple(3, 4, 5, Cell.O)) {
      return (num_players == 1) ? Outcome.COMPUTER_WON : Outcome.P2_WON;
    }
    
    /* bottom row */
    if(checkTriple(6, 7, 8, Cell.X)) return Outcome.P1_WON;
    else if(checkTriple(6, 7, 8, Cell.O)) {
      return (num_players == 1) ? Outcome.COMPUTER_WON : Outcome.P2_WON;
    }
    
    /* left col */
    if(checkTriple(0, 3, 6, Cell.X)) return Outcome.P1_WON;
    else if(checkTriple(0, 3, 6, Cell.O)) {
      return (num_players == 1) ? Outcome.COMPUTER_WON : Outcome.P2_WON;
    }
    
    /* middle col */
    if(checkTriple(1, 4, 7, Cell.X)) return Outcome.P1_WON;
    else if(checkTriple(1, 4, 7, Cell.O)) {
      return (num_players == 1) ? Outcome.COMPUTER_WON : Outcome.P2_WON;
    }
    
    /* right col */
    if(checkTriple(2, 5, 8, Cell.X)) return Outcome.P1_WON;
    else if(checkTriple(2, 5, 8, Cell.O)) {
      return (num_players == 1) ? Outcome.COMPUTER_WON : Outcome.P2_WON;
    }
    
    /*     /     */
    if(checkTriple(2, 4, 6, Cell.X)) return Outcome.P1_WON;
    else if(checkTriple(2, 4, 6, Cell.O)) {
      return (num_players == 1) ? Outcome.COMPUTER_WON : Outcome.P2_WON;
    }
    
    /*     \     */
    if(checkTriple(0, 4, 8, Cell.X)) return Outcome.P1_WON;
    else if(checkTriple(0, 4, 8, Cell.O)) {
      return (num_players == 1) ? Outcome.COMPUTER_WON : Outcome.P2_WON;
    }
    
    /* check for CATS game */
    boolean cats = true;
    for(int i = 0; i < 9; i++) {
      if(cells[i] == Cell.OPEN)
        cats = false;
    }
    
    if(cats)
      return Outcome.CAT;
    else
      return Outcome.NONE;
  }
  
  public void finishGame(Outcome out, int call_no, String p1_name, String p2_name) {
    
    /* new status */
    final TextView status2 = (TextView) findViewById(R.id.TextView01);
    
    if(call_no == 1) {
      /* set the win animation */
      setContentView(R.layout.win);
      status2.setText(status.getText( ));
      
      final ImageView img = (ImageView) findViewById(R.id.ImageView01);
      AnimationDrawable ad = (AnimationDrawable) getBaseContext( ).getResources( )
        .getDrawable(R.anim.fworks);
      
      img.setImageDrawable(ad);
      ad.start( );
      
      
      /* this dialog will call back with call_no = 2 and p1_name in place*/
      NameDialog diag = new NameDialog(this, out, 1, "", num_players);
      diag.show( );
      return;
    } else if(call_no == 2) {
      if(num_players == 2) {
        /* this dialog will call back with call_no = 3 and p1_name and p2_name in place*/
        NameDialog diag = new NameDialog(this, out, 2, p1_name, num_players);
        diag.show( );
        return;
      }
    }
    
    /* we have the names we need! */
    if(p2_name == "") p2_name = "Computer";
    
    /* set debug text */
    String winner = (out == Outcome.P1_WON) ? p1_name : p2_name;
    String loser = ((out == Outcome.P2_WON) || (out == Outcome.COMPUTER_WON)) ? p1_name : p2_name;
    if(out == Outcome.CAT)
      status2.setText(p1_name + " tied " + p2_name);
    else
      status2.setText(winner + " beat " + loser);
    
    
    /* open up the stats database */
    StatsDatabase db = new StatsDatabase(this);
    db.open( );
    
    /* record p1 stats */
    switch(out) {
      case P1_WON:
        db.recordWin(p1_name);
        break;
      case P2_WON:
      case COMPUTER_WON:
        db.recordLoss(p1_name);
        break;
      case CAT:
        db.recordTie(p1_name);
        break;
    }  
    
    if(num_players == 2) {
      /* record p2 stats */
      switch(out) {
        case P2_WON:
          db.recordWin(p2_name);
          break;
        case P1_WON:
          db.recordLoss(p2_name);
          break;
        case CAT:
          db.recordTie(p2_name);
          break;
      }
    }

    /* close up the database */
    db.close();
        
    /* leave this activity */
    finish( );
  }
  
  public boolean canWin(int index, Cell player) {
    /* save old val */
    Cell old = cells[index];
    
    /* overwrite */
    cells[index] = player;
    
    /* does this result in win? */
    boolean can;
    Outcome out = checkGame( );
    if((out == Outcome.NONE) || (out == Outcome.CAT))
      can = false;
    else
      can = true;
    
    /* restore value */
    cells[index] = old;
    
    return can;
  }
  
  public int rankMove(int index) {
    /* if the space is taken, it is a 0 */
    if(cells[index] != Cell.OPEN)
      return 0;
    
    /* check if we can win here */
    if(canWin(index, Cell.O))
      return 100;
    
    /* check if opponent could win here */
    if(canWin(index, Cell.X))
      return 50;
    
    /* center square */
    if(index == 4)
      return 25;
    
    /* corner */
    if((index == 0) || (index == 2) || (index == 6) || (index == 8))
      return 10;
    
    /* meh */
    return 5;
    
  }
  
  public void doAi( ) {
    int rankings [] = new int[9];
  
    /* get the rankings */
    for(int i = 0; i < 9; i++) {
      if(cells[i] == Cell.OPEN) {
        rankings[i] = rankMove(i);
      }
    }
    
    /* choose best ranking */
    int best_ranking = 0;
    for(int i = 0; i < 9; i++) {
      if(rankings[i] > rankings[best_ranking])
        best_ranking = i;
    }
    
    /* go with the best ranking */
    buttons[best_ranking].button.performClick( );
  }
  
  /* called when a button is clicked */
  public void update(int cell, int turn) {
    /* set the cell */
    cells[cell] = ((turn % 2) == 0) ? Cell.X : Cell.O;
    
    /* check for a winner */
    Outcome o;
    switch(o = checkGame( )) {
      case P1_WON:
        status.setText("Player 1 Won!!");
        finishGame(o, 1, "", "");
        break;
      case P2_WON:
        status.setText("Player 2 Won!!");
        finishGame(o, 1, "", "");
        break;
      case COMPUTER_WON:
        status.setText("You Have Lost!!");
        finishGame(o, 1, "", "");
        break;
      case CAT:
        status.setText("It's a CAT Game!!");
        finishGame(o, 1, "", "");
        break;
      case NONE:
        status.setText(((turn % 2) == 0) ? "O's Turn" : "X's Turn"); 
        break;
    }
    
    /* time to do computer move if needed */
    if((num_players == 1) && ((turn % 2) == 0) && (o == Outcome.NONE))
      doAi( );
  }
  
  
  /* our buttons */
  private AnimatedButton buttons [] = new AnimatedButton [9];
  
  /* text view for debugging */
  public TextView status;
  
  /* setup buttons and interface */
  public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.game);
        
        setupGame( );
        
        status = (TextView) findViewById(R.id.TextView01);
        
        /* set number of players */
        if(getIntent( ).getType( ).equalsIgnoreCase("1"))
          num_players = 1;
        else 
          num_players = 2;
        
        status.setText("X's Turn");
        
        
        /* setup buttons */
        int button_ids [] = {R.id.ImageButton01, R.id.ImageButton02, R.id.ImageButton03,
                   R.id.ImageButton04, R.id.ImageButton05, R.id.ImageButton06,
                   R.id.ImageButton07, R.id.ImageButton08, R.id.ImageButton09}; 

        for(int i=0; i<9; i++) {
          buttons[i] = new AnimatedButton((ImageButton) findViewById(button_ids[i]), this, i);
        }   
  }
}

Java Source Code List

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