com.musevisions.android.SudokuSolver.SudokuSolverActivity.java Source code

Introduction

Here is the source code for com.musevisions.android.SudokuSolver.SudokuSolverActivity.java

Source

/**
 * JSON Sudoku solver is covered under the Creative Commons Attribution 3.0 Unported License
 * http://creativecommons.org/licenses/by/3.0/
 * 
 * @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();
    }

}