Android Open Source - my_training Sudoku Adapter

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License

The source code is released under:

GNU Lesser General Public License

Java Source Code

package com.example.sudoku;
import java.util.ArrayList;
import java.util.Random;
//from  w  w w  .ja  v  a  2  s  . c  o  m
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

/**
 * @author Sergey Kashin
 * @brief ArrayAdapter that contains Sudoku's
 * field values  
 *
 */
public class SudokuAdapter extends BaseAdapter
{
  
  static String TAG = "SudokuAdapter";
  private Context mContext;

  public SudokuAdapter(Context context)
  {
    regenerateSudokuArray();
    mContext = context;
    mTextViews = new TextView[9][9];
  }
  
  @Override
  public int getCount()
  {
    return 81;
  }

  @Override
  public Object getItem(int position)
  {
    if (position >= mFieldValues.length)
    {
      android.util.Log.e(TAG, "getItem: position " + position +" is out of range");
      return null;
    }
    return mFieldValues[position % 9][position / 9];
  }

  @Override
  public long getItemId(int position)
  {
    if (position >= 81)
    {
      android.util.Log.e(TAG, "getItem: position " + position +" is out of range");
      return 0;
    }
    if (mTextViews == null ||
        mTextViews[position % 9][position / 9] == null)
    {
      return 0;
    }
    return mTextViews[position % 9][position / 9].getId();
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent)
  {
    TextView newView;
      int column = position / 9;
      int row = position % 9;
        if (convertView == null)
        {  // if it's not recycled, initialise some attributes
          newView = new TextView(mContext);
          newView.setText(mFieldValues[row][column].toString());
        }
        else
        {
            newView = (TextView) convertView;
        }
        mTextViews[row][column] = newView;
    return newView;
  }
  
  /**
   * @brief regenerates Sudoku field == regenerates Field's and User's Integer arrays.
   */
  public void regenerateSudokuArray()
  {
    // TODO: implement field generation :)
    mFieldValues = new Integer[9][9];
    mUserValues = new Integer[9][9];
    Random random = new Random();
    for (int i = 0; i < 9; i++)
    {
      for (int j = 0; j < 9; j++)
      {
        mUserValues[i][j] = 0;
      }
    }
    for (int i = 0; i < 9; i++)
    {
      for (int j = 0; j < 9; j++)
      {
        int newValue = random.nextInt(9) + 1;
        ArrayList<Integer> excludedValues = new ArrayList<Integer>();
        int regionsColumn = i / 3 + 1;
        int regionsRow = j / 3 + 1;
        while (hasSameValueInColumn(newValue, j) ||
             hasSameValueInRow(newValue, i) ||
             hasSameValueInRegion(newValue, regionsColumn, regionsRow))
        {
          excludedValues.add(newValue);
          newValue = random.nextInt(9) + 1;
          boolean needToRegenerate = false;
          while (excludedValues.contains(newValue))
          {
            newValue++;
            if (newValue > 9)
            {
              if (!needToRegenerate)
              {
                needToRegenerate = true;
              }
              else
              {
                regenerateSudokuArray();
                return;
              }
              newValue = 1;
            }
          }
        }
        mFieldValues[i][j] = newValue;
        mUserValues[i][j] = newValue;
      }
    }
  }
  
  public boolean hasSameValueInRow(Integer value, int row) {
    boolean res = false;
    for (int i = 0; i < 9; i++)
    {
      if (value.intValue() == mUserValues[row][i])
      {
        return true;
      }
    }
    return res;
  }
  
  public boolean hasSameValueInColumn(Integer value, int column)
  {
    boolean res = false;
    for (int i = 0; i < 9; i++)
    {
      if (value.intValue() == mUserValues[i][column])
      {
        return true;
      }
    }
    return res;
  }
  
  public boolean hasSameValueInRegion(Integer value, int regionsColumn, int regionsRow)
  {
    boolean res = false;
    int iEnd = regionsColumn * 3 - 4;
    int jEnd = regionsRow * 3 - 4;
    for (int i = regionsColumn * 3 - 1; i > iEnd; i--)
    {
      for (int j = regionsRow * 3 - 1; j > jEnd; j-- )
      {
        if (value.intValue() == mUserValues[i][j])
        {
          return true;
        }
      }
    }

    return res;
  }

  public boolean isUserWin()
  {
    if (mFieldValues.length != mUserValues.length)
    {
      return false;
    }
    for (int i = 0; i < 9 ; i++)
    {
      for (int j = 0; j < 9 ; j++)
      {
        if (mFieldValues[i][j] != mUserValues[i][j])
        {
          return false;
        }
      }
    }
    return true;
  }
  
  public Integer[][] getUserValues()
  {
    return mUserValues;
  }
  
  public void setUserValues(Integer[][] userValues)
  {
    mUserValues = userValues;
  }
  
  private Integer[][] mFieldValues;
  private Integer[][] mUserValues;
  private TextView[][] mTextViews;

}

Java Source Code List

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