Android应用实践之数独游戏开发

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:background="@color/background"   android:layout_height="fill_parent"  android:layout_width="fill_parent"  android:padding="30dip"   android:orientation="horizontal">  <LinearLayout    android:orientation="vertical"     android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:layout_gravity="center">    <TextView      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:layout_gravity="center"      android:layout_marginBottom="25dip"      android:text="@string/main_title"      android:textSize="24sp" />    <Button      android:id="@+id/continue_button"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:text="@string/continue_label" />    <Button      android:id="@+id/new_button"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:text="@string/new_game_label" />    <Button      android:id="@+id/about_button"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:text="@string/about_label" />    <Button      android:id="@+id/exit_button"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:text="@string/exit_label" />  </LinearLayout></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><TableLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:id="@+id/keypad"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:orientation="vertical"  android:background="@color/puzzle_background"  android:stretchColumns="*" >  <TableRow >    <Button      android:id="@+id/keypad_1"      android:text="@string/keypad_1" />    <Button      android:id="@+id/keypad_2"      android:text="@string/keypad_2" />    <Button      android:id="@+id/keypad_3"      android:text="@string/keypad_3" />  </TableRow>  <TableRow >    <Button      android:id="@+id/keypad_4"      android:text="@string/keypad_4" />    <Button      android:id="@+id/keypad_5"      android:text="@string/keypad_5" />    <Button      android:id="@+id/keypad_6"      android:text="@string/keypad_6" />  </TableRow>  <TableRow >    <Button      android:id="@+id/keypad_7"      android:text="@string/keypad_7" />    <Button      android:id="@+id/keypad_8"      android:text="@string/keypad_8" />    <Button      android:id="@+id/keypad_9"      android:text="@string/keypad_9" />  </TableRow></TableLayout>

<?xml version="1.0" encoding="utf-8"?><ScrollView  xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:padding="10dip">  <TextView     android:id="@+id/about_content"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="@string/about_text"/></ScrollView>

package com.dw.gamesuduku;import android.app.Activity;import android.os.Bundle;public class About extends Activity {  @Override  protected void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    setContentView(R.layout.about);  }}

package com.dw.gamesuduku;import android.app.Activity;import android.app.Dialog;import android.os.Bundle;import android.util.Log;import android.view.Gravity;import android.widget.Toast;public class Game extends Activity {  private static final String TAG="Sudoku";  private static final String PREF_PUZZLE="puzzle";  protected static final int DIFFICULTY_CONTINUE=-1;  public static final String KEY_DIFFICULTY="difficulty";  public static final int DIFFICULTY_EASY=0;  public static final int DIFFICULTY_MEDIUM=1;  public static final int DIFFICULTY_HARD=2;  private int puzzle[]=new int[9*9];  private PuzzleView puzzleView;  //三种游戏模式  private static final String easyPuzzle="360000000004230800000004200"+                  "070460003820000014500013010"+                  "001900000007048300000000045";  private static final String mediumPuzzle="650000070000506000014000005"+                       "007009000002314700000700800"+                       "500000630000201000030000097";  private static final String hardPuzzle="009000000080605020501078000"+                      "000000700706040102004000000"+                      "000720903090301080000000600";  private final int used[][][]=new int[9][9][];  @Override  protected void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    Log.e(TAG, "onCreate");    int diff=getIntent().getIntExtra(KEY_DIFFICULTY, DIFFICULTY_EASY);    puzzle=getPuzzle(diff);    calculateUsedTiles();    puzzleView=new PuzzleView(this);    setContentView(puzzleView);    puzzleView.requestFocus();    //if the activity is restarted ,do a continue next time    getIntent().putExtra(KEY_DIFFICULTY, DIFFICULTY_CONTINUE);  }  @Override  protected void onPause() {    // TODO Auto-generated method stub    super.onPause();    Music.stop(this);    //Save the current puzzle    getPreferences(MODE_PRIVATE).edit().putString(PREF_PUZZLE, toPuzzleString(puzzle)).commit();  }  @Override  protected void onResume() {    // TODO Auto-generated method stub    super.onResume();    Music.play(this, R.raw.game);  }  protected int[] getUsedTiles(int x,int y){    return used[x][y];  }  private void calculateUsedTiles() {    // TODO Auto-generated method stub    for (int x = 0; x < 9; x++) {      for (int y = 0; y < 9; y++) {        used[x][y]=calculateUsedTiles(x,y);      }    }  }  private int[] calculateUsedTiles(int x, int y) {    // TODO Auto-generated method stub    int c[]=new int[9];    //horizontal    for(int i=0;i<9;i++){      if(i==y)        continue;      int t=getTitle(x, i);      if(t!=0)        c[t-1]=t;    }    //vertical    for(int i=0;i<9;i++){      if(i==x)        continue;      int t=getTitle(i, y);      if(t!=0)        c[t-1]=t;    }    //same cell block    int startx=(x/3)*3;    int starty=(y/3)*3;    for(int i=startx;i<startx+3;i++){      for(int j=starty;j<starty+3;j++){        if(i==x&&j==y)          continue;        int t=getTitle(i, j);        if(t!=0)          c[t-1]=t;      }    }    //compress    int nused=0;    for (int t : c) {      if(t!=0)      nused++;    }    int c1[]=new int[nused];    nused=0;    for (int t : c) {      if(t!=0)        c1[nused++]=t;    }    return c1;  }  //give a difficulty level  private int[] getPuzzle(int diff) {    // TODO Auto-generated method stub    String puz = null;    switch (diff) {    case DIFFICULTY_CONTINUE:      puz=getPreferences(MODE_PRIVATE).getString(PREF_PUZZLE, easyPuzzle);      break;    case DIFFICULTY_HARD:      puz=hardPuzzle;      break;    case DIFFICULTY_MEDIUM:      puz=mediumPuzzle;      break;    case DIFFICULTY_EASY:      puz=easyPuzzle;      break;    }    return fromPuzzleString(puz);  }  //convert an array into a puzzle string  static private String toPuzzleString(int[] puz){    StringBuilder buf=new StringBuilder();    for (int element : puz) {      buf.append(element);    }    return buf.toString();  }  //convert a puzzle string to an array  static protected int[] fromPuzzleString(String string) {    // TODO Auto-generated method stub    int[] puz=new int[string.length()];    for (int i = 0; i < puz.length; i++) {    puz[i]=string.charAt(i)-'0';    }    return puz;  }   public String getTitleString(int x, int y) {    // TODO Auto-generated method stub    int v=getTitle(x,y);    if(v==0)      return "";    else      return String.valueOf(v);  }  private int getTitle(int x, int y) {    // TODO Auto-generated method stub    return puzzle[y*9+x];  }  private void setTitle(int x,int y,int value){    puzzle[y*9+x]=value;  }  //change the tile only if it's a valid move  protected boolean setTileIfValid(int x, int y, int value) {    // TODO Auto-generated method stub    int tiles[]=getUsedTiles(x, y);    if(value!=0){      for (int tile : tiles) {        if(tile==value)          return false;      }    }    setTitle(x, y, value);    calculateUsedTiles();    return true;  }  //open the keypad if there are any valid moves  protected void showKeypadOrError(int x, int y) {    // TODO Auto-generated method stub    int tiles[]=getUsedTiles(x, y);    if(tiles.length==9){      Toast toast=Toast.makeText(this, R.string.no_moves_label, Toast.LENGTH_SHORT);      toast.setGravity(Gravity.BOTTOM, 0, 0);      toast.show();    }else{      Log.d(TAG, "showKeypad:used="+toPuzzleString(tiles));      Dialog v=new Keypad(this,tiles,puzzleView);      v.show();    }  }}

package com.dw.gamesuduku;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.view.KeyEvent;import android.view.View;public class Keypad extends Dialog {  protected static final String TAG="Sudoku";  private final View keys[]=new View[9];  private View keypad;  private final int useds[];  private PuzzleView puzzleView;  public Keypad(Context context,int useds[],PuzzleView puzzleView){    super(context);    this.useds=useds;    this.puzzleView=puzzleView;  }  @Override  protected void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    setContentView(R.layout.keypad);    findViews();    for (int element : useds) {      if(element!=0){        keys[element-1].setVisibility(View.INVISIBLE);      }      setListeners();    }  }  @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {    // TODO Auto-generated method stub    int tile=0;    switch (keyCode) {    case KeyEvent.KEYCODE_0:    case KeyEvent.KEYCODE_SPACE:tile=0;break;    case KeyEvent.KEYCODE_1:tile=1;break;    case KeyEvent.KEYCODE_2:tile=2;break;    case KeyEvent.KEYCODE_3:tile=3;break;    case KeyEvent.KEYCODE_4:tile=4;break;    case KeyEvent.KEYCODE_5:tile=5;break;    case KeyEvent.KEYCODE_6:tile=6;break;    case KeyEvent.KEYCODE_7:tile=7;break;    case KeyEvent.KEYCODE_8:tile=8;break;    case KeyEvent.KEYCODE_9:tile=9;break;    default:      return super.onKeyDown(keyCode, event);    }    if(isValid(tile)){      returnResult(tile);    }    return true;  }  private boolean isValid(int tile) {    // TODO Auto-generated method stub    for (int t : useds) {      if(tile==t)        return false;    }    return true;  }  private void findViews() {    // TODO Auto-generated method stub    keypad=findViewById(R.id.keypad);    keys[0]=findViewById(R.id.keypad_1);    keys[1]=findViewById(R.id.keypad_2);    keys[2]=findViewById(R.id.keypad_3);    keys[3]=findViewById(R.id.keypad_4);    keys[4]=findViewById(R.id.keypad_5);    keys[5]=findViewById(R.id.keypad_6);    keys[6]=findViewById(R.id.keypad_7);    keys[7]=findViewById(R.id.keypad_8);    keys[8]=findViewById(R.id.keypad_9);  }  private void setListeners(){    for(int i=0;i<keys.length;i++){      final int t=i+1;      keys[i].setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View arg0) {          // TODO Auto-generated method stub          returnResult(t);        }      });    }    keypad.setOnClickListener(new View.OnClickListener() {      public void onClick(View arg0) {        // TODO Auto-generated method stub        returnResult(0);      }    });  }  private void returnResult(int tile) {    // TODO Auto-generated method stub    puzzleView.setSelectedTile(tile);    dismiss();  }}

package com.dw.gamesuduku;import android.content.Context;import android.media.MediaPlayer;public class Music {  private static MediaPlayer mp=null;  //stop old song and start a new song  public static void play(Context context,int resource){    stop(context);    if(Settings.getMusic(context)){    mp=MediaPlayer.create(context, resource);    mp.setLooping(true);    mp.start();    }  }  //stop the music  public static void stop(Context context) {    // TODO Auto-generated method stub    if(mp!=null){      mp.stop();      mp.release();      mp=null;    }  }}

package com.dw.gamesuduku;import android.annotation.SuppressLint;import android.content.Context;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Paint.FontMetrics;import android.graphics.Paint.Style;import android.graphics.Rect;import android.os.Bundle;import android.os.Parcelable;import android.util.Log;import android.view.KeyEvent;import android.view.MotionEvent;import android.view.View;import android.view.animation.AnimationUtils;@SuppressLint("DrawAllocation")public class PuzzleView extends View {  private static final String TAG = "Sudoku";  private final Game game;  private float width;  private float height;  private int selX;  private int selY;  private final Rect selRect = new Rect();  private static final String SELX="selX";  private static final String SELY="selY";  private static final String VIEW_STATE="viewState";  private static final int ID=42;//any positive int num  public PuzzleView(Context context) {    super(context);    this.game = (Game) context;    setFocusable(true);    setFocusableInTouchMode(true);    setId(ID);  }  @Override  protected void onSizeChanged(int w, int h, int oldw, int oldh) {    // TODO Auto-generated method stub    width = w / 9f;    height = h / 9f;    getRect(selX, selY, selRect);    Log.d(TAG, "onSizeChanged:width" + width + ",height" + height);    super.onSizeChanged(w, h, oldw, oldh);  }  //实例状态保存在bundle中，保存当前游戏状态  @Override  protected Parcelable onSaveInstanceState() {    // TODO Auto-generated method stub    Parcelable p=super.onSaveInstanceState();    Log.d(TAG, "onSavedInstanceState");    Bundle bundle=new Bundle();    bundle.putInt(SELX, selX);    bundle.putInt(SELY, selY);    bundle.putParcelable(VIEW_STATE, p);    return bundle;  }   //恢复已经保存的信息  @Override  protected void onRestoreInstanceState(Parcelable state) {    // TODO Auto-generated method stub    Log.d(TAG, "onRestoreInstanceState");    Bundle bundle=(Bundle) state;    select(bundle.getInt(SELX),bundle.getInt(SELY));    super.onRestoreInstanceState(bundle.getParcelable(VIEW_STATE));    return;  }  @Override  protected void onDraw(Canvas canvas) {    // TODO Auto-generated method stub    // draw background    Paint background = new Paint();    background.setColor(getResources().getColor(R.color.puzzle_background));    canvas.drawRect(0, 0, getWidth(), getHeight(), background);    // draw board    Paint dark = new Paint();    dark.setColor(getResources().getColor(R.color.puzzle_dark));    Paint hilite = new Paint();    hilite.setColor(getResources().getColor(R.color.puzzle_hilite));    Paint light = new Paint();    light.setColor(getResources().getColor(R.color.puzzle_light));    // draw minor grid lines    for (int i = 0; i < 9; i++) {      canvas.drawLine(0, i * height, getWidth(), i * height, light);      canvas.drawLine(0, i * height + 1, getWidth(), i * height + 1,          hilite);      canvas.drawLine(i * width, 0, i * width, getHeight(), dark);      canvas.drawLine(i * width + 1, 0, i * width + 1, getHeight(),          hilite);    }    // draw major grid lines    for (int i = 0; i < 9; i++) {      if (i % 3 != 0)        continue;      canvas.drawLine(0, i * height, getWidth(), i * height, dark);      canvas.drawLine(0, i * height + 1, getWidth(), i * height + 1,          hilite);      canvas.drawLine(i * width, 0, i * width, getHeight(), dark);      canvas.drawLine(i * width + 1, 0, i * width + 1, getHeight(),          hilite);    }    // draw numbers    Paint foreground = new Paint(Paint.ANTI_ALIAS_FLAG);    foreground.setColor(getResources().getColor(R.color.puzzle_foregroud));    foreground.setStyle(Style.FILL);    foreground.setTextSize(height * 0.75f);    foreground.setTextScaleX(width / height);    foreground.setTextAlign(Paint.Align.CENTER);    // draw num in the center of the tile    FontMetrics fm = foreground.getFontMetrics();    float x = width / 2;    float y = height / 2 - (fm.ascent + fm.descent) / 2;    for (int i = 0; i < 9; i++) {      for (int j = 0; j < 9; j++) {        canvas.drawText(this.game.getTitleString(i, j), i * width + x,            j * height + y, foreground);      }    }    // draw the selection    Log.e(TAG, "selRect=" + selRect);    Paint selected = new Paint();    selected.setColor(getResources().getColor(R.color.puzzle_selected));    canvas.drawRect(selRect, selected);    //draw the hints pick a hint color based on moves left    //根据每个单元格可填的数目给出不同颜色的提示    if(Settings.getHints(getContext())){    Paint hint=new Paint();    int c[]={getResources().getColor(R.color.puzzle_hint_0),        getResources().getColor(R.color.puzzle_hint_1),        getResources().getColor(R.color.puzzle_hint_2),};    Rect r=new Rect();    for (int i = 0; i < 9; i++) {      for (int j = 0; j < 9; j++) {        int movesleft=9-game.getUsedTiles(i, j).length;        if(movesleft<c.length){          getRect(i, j, r);          hint.setColor(c[movesleft]);          canvas.drawRect(r, hint);        }      }    }  }  }  @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {    // TODO Auto-generated method stub    Log.d(TAG, "onKeyDown:keycode=" + keyCode + ",event=" + event);    switch (keyCode) {    case KeyEvent.KEYCODE_DPAD_UP:      select(selX, selY - 1);      break;    case KeyEvent.KEYCODE_DPAD_DOWN:      select(selX, selY + 1);      break;    case KeyEvent.KEYCODE_DPAD_LEFT:      select(selX - 1, selY);      break;    case KeyEvent.KEYCODE_DPAD_RIGHT:      select(selX + 1, selY);      break;    case KeyEvent.KEYCODE_0:    case KeyEvent.KEYCODE_SPACE:      setSelectedTile(0);      break;    case KeyEvent.KEYCODE_1:      setSelectedTile(1);      break;    case KeyEvent.KEYCODE_2:      setSelectedTile(2);      break;    case KeyEvent.KEYCODE_3:      setSelectedTile(3);      break;    case KeyEvent.KEYCODE_4:      setSelectedTile(4);      break;    case KeyEvent.KEYCODE_5:      setSelectedTile(5);      break;    case KeyEvent.KEYCODE_6:      setSelectedTile(6);      break;    case KeyEvent.KEYCODE_7:      setSelectedTile(7);      break;    case KeyEvent.KEYCODE_8:      setSelectedTile(8);      break;    case KeyEvent.KEYCODE_9:      setSelectedTile(9);      break;    case KeyEvent.KEYCODE_ENTER:    case KeyEvent.KEYCODE_DPAD_CENTER:      game.showKeypadOrError(selX, selY);    default:      return super.onKeyDown(keyCode, event);    }    return true;  }  //显示软键盘  @Override  public boolean onTouchEvent(MotionEvent event) {    // TODO Auto-generated method stub    if(event.getAction()!=MotionEvent.ACTION_DOWN)    return super.onTouchEvent(event);    select((int)(event.getX()/width),(int)(event.getY()/height));    game.showKeypadOrError(selX, selY);    Log.d(TAG, "onTouchEvent:x"+selX+",y"+selY);    return true;  }  public void setSelectedTile(int tile) {    // TODO Auto-generated method stub    //num is not valid for this tile    Log.d(TAG, "selectedTile:invalid:"+tile);//   startAnimation(AnimationUtils.loadAnimation(game, R.aims.shake));    if (game.setTileIfValid(selX, selY, tile)) {      invalidate();    } else {      // num is not invalid for this tile      Log.d(TAG, "setSelectedTile:invalid " + tile);    }  }  // 首先计算选定区域的x，y坐标，然后再次调用getRect方法计算新的选择矩形  private void select(int x, int y) {    // TODO Auto-generated method stub    invalidate(selRect);// 第一次调用通知原选择的区域需要重绘    selX = Math.min(Math.max(x, 0), 8);    selY = Math.min(Math.max(y, 0), 8);    getRect(selX, selY, selRect);    invalidate(selRect);// 第二次调用通知新选择的区域也需要重绘  }  private void getRect(int x, int y, Rect rect) {    // TODO Auto-generated method stub    rect.set((int) (x * width), (int) (y * height),        (int) (x * width + width), (int) (y * height + height));  }}

package com.dw.gamesuduku;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.preference.PreferenceFragment;import android.preference.PreferenceManager;public class Settings extends Activity {  private static final String OPT_MUSIC="music";  private static final boolean OPT_MUSIC_DEF=true;  private static final String OPT_HINTS="hints";  private static final boolean OPT_HINTS_DEF=true;  @Override  public void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    getFragmentManager().beginTransaction().replace(android.R.id.content, new PrefsFragement()).commit();  }  public static class PrefsFragement extends PreferenceFragment{     public void onCreate(Bundle savedInstanceState) {       // TODO Auto-generated method stub       super.onCreate(savedInstanceState);       addPreferencesFromResource(R.xml.settings);    }   }   //get the current music option  public static boolean getMusic(Context context){    return PreferenceManager.getDefaultSharedPreferences(context).getBoolean(OPT_MUSIC,OPT_MUSIC_DEF);  }  //get the current music option  public static boolean getHints(Context context){    return PreferenceManager.getDefaultSharedPreferences(context).getBoolean(OPT_HINTS,OPT_HINTS_DEF);  }}

package com.dw.gamesuduku;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.util.Log;import android.view.Menu;import android.view.MenuInflater;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;public class Sudoku extends Activity implements OnClickListener {  private static final String TAG = "Sudoku";  @Override  protected void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    View continueButton = this.findViewById(R.id.continue_button);    continueButton.setOnClickListener(this);    View newButton = this.findViewById(R.id.new_button);    newButton.setOnClickListener(this);    View aboutButton = this.findViewById(R.id.about_button);    aboutButton.setOnClickListener(this);    View exitButton = this.findViewById(R.id.exit_button);    exitButton.setOnClickListener(this);  }  @Override  public void onClick(View v) {    // TODO Auto-generated method stub    switch (v.getId()) {    case R.id.continue_button:      startGame(Game.DIFFICULTY_CONTINUE);    case R.id.about_button:      Intent i = new Intent(this, About.class);      startActivity(i);      break;    case R.id.new_button:      openNewGameDialog();      break;    case R.id.exit_button:      finish();      break;    }  }  @Override  protected void onResume() {    // TODO Auto-generated method stub    super.onResume();    Music.play(this, R.raw.welcome);  }  @Override  protected void onPause() {    // TODO Auto-generated method stub    super.onPause();    Music.stop(this);  }  @Override  public boolean onCreateOptionsMenu(Menu menu) {    // TODO Auto-generated method stub    super.onCreateOptionsMenu(menu);    MenuInflater inflater = getMenuInflater();    inflater.inflate(R.menu.menu, menu);    return true;  }  @Override  public boolean onOptionsItemSelected(MenuItem item) {    // TODO Auto-generated method stub    switch (item.getItemId()) {    case R.id.settings:      startActivity(new Intent(this, Settings.class));      return true;    }    return false;  }  private void openNewGameDialog() {    // TODO Auto-generated method stub    new AlertDialog.Builder(this).setTitle(R.string.new_game_title)        .setItems(R.array.difficulty,            new DialogInterface.OnClickListener() {              @Override              public void onClick(                  DialogInterface dialoginterface, int i) {                // TODO Auto-generated method stub                startGame(i);              }            }).show();  }  protected void startGame(int i) {    // TODO Auto-generated method stub    Log.i(TAG, "clicked on"+i);    Intent intent=new Intent(Sudoku.this,Game.class);    intent.putExtra(Game.KEY_DIFFICULTY, i);    startActivity(intent);   }}