Android Open Source - SudokuSolver Sudoku Solver Activity

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License

The source code is released under:

License JSON Sudoku Solver is covered under the Creative Commons Attribution 3.0 Unported License http://creativecommons.org/licenses/by/3.0/ Credits Sudoku Solver Java implementation: Kevin Coulombe...

Java Source Code

/**
 * JSON Sudoku solver is covered under the Creative Commons Attribution 3.0 Unported License
 * http://creativecommons.org/licenses/by/3.0/
 * //from w w w  . j  a va 2  s  .  c o m
 * @author: Andrea Bizzotto {@link www.musevisions.com}, {@link www.bizzotto.biz}
 * @email: bizz84dev@gmail.com
 */
package com.musevisions.android.SudokuSolver;

import java.io.InputStream;

import org.json.JSONArray;

import com.musevisions.android.SudokuSolver.SudokuCore.SolverListener;
import com.musevisions.android.SudokuSolver.SudokuCore.SolverMethod;


import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;

/** Main class handling the UI for the Sudoku Solver */ 
public class SudokuSolverActivity extends Activity implements SolverListener {
  
  //private static final String TAG = "SudokuSolverActivity";
  private GridView mGridView;
  private CheckBox mChkBruteForce; 
  private SudokuSolverTask mSolver;
  private int [] mCurrentInput;
  private String mPuzzleName;
    private AlertDialog mDialog;


    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.solver);
        
        ((MainTabActivity)getParent()).setSolverActivity(this);

        InputStream is = getResources().openRawResource(R.raw.input_array);
        mCurrentInput = JSONHelper.getSudokuArray(is);
        
        mGridView = (GridView)findViewById(R.id.gridView);
        
        mGridView.setGameInput(mCurrentInput);
        
        mChkBruteForce = (CheckBox)findViewById(R.id.checkBruteForce);
        
        Button verify = (Button)findViewById(R.id.btnVerify);
        verify.setOnClickListener(new OnClickListener() {
      
      @Override
      public void onClick(View v) {
        /* Verify input, or if puzzle has been solved, output. */
        int [] output = mGridView.getSolution();
        int [] toVerify = output != null ? output : mCurrentInput;
        String error = SudokuCore.verify(toVerify);
        if (error != null)
          ShortToast(error);
        else
          ShortToast("Puzzle is valid");
      }
    });
        
        Button solve = (Button)findViewById(R.id.btnSolve);
        solve.setOnClickListener(new OnClickListener() {
      
      @Override
      public void onClick(View v) {
        SolverMethod method = mChkBruteForce.isChecked() ? SolverMethod.SOLVER_BRUTE_FORCE : SolverMethod.SOLVER_OPTIMISED; 
        mGridView.setSolution(null);
        SudokuSolverActivity.this.mSolver = new SudokuSolverTask(mCurrentInput,
            SudokuSolverActivity.this, mGridView, method);
        
        
          mDialog = ProgressDialog.show(SudokuSolverActivity.this, "Solving", "Please wait...",
                false, true, new OnCancelListener() {                
                @Override
                public void onCancel(DialogInterface dialog) {
                  if (mSolver != null)
                    mSolver.cancel(true);
                }
              });

        SudokuSolverActivity.this.mSolver.execute();
      }
    });
        
        
        Button about = (Button)findViewById(R.id.btnAbout);
        about.setOnClickListener(new OnClickListener() {
      
      @Override
      public void onClick(View v) {

        CustomDialogs.createAbout(SudokuSolverActivity.this).show();
      }
    });
    }

    /** Callback to be called when solver thread completes */
  @Override
  public boolean onSolverEvent(int[] result) {
      mDialog.dismiss();
    mSolver = null;
    if (result != null) {
      mGridView.setSolution(result);
      writeOutput(result);
    }
    return true;
  }

    public void updateView(int newInput[], String name) {
      mPuzzleName = name;
      mCurrentInput = newInput;
      mGridView.setGameInput(newInput);
      mGridView.setSolution(null);
    }


    private void writeOutput(int[] result) {
      if (HttpPostUtils.isConnected(this) && mPuzzleName != null) {
          JSONArray json = JSONHelper.toJSONArray(result);
        HttpPostUtils.postResult(mPuzzleName, json, this);
      }
    }
    
    public void ShortToast(String msg) {
      
    Toast.makeText(SudokuSolverActivity.this, msg, Toast.LENGTH_SHORT).show();
    }

   
}

Java Source Code List

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