Android Open Source - MathGame Main Activity

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Back to project page MathGame.

License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * Copyright (C) 2012 by Luis ??ngel Fernndez Fernndez <la@zzsoft.es>
 * /*from  w ww.ja  va 2s.c  o  m*/
 * This file is part of MathGame.
 * 
 * MathGame is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * MathGame is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Foobar.  If not, see <http://www.gnu.org/licenses/>.ww.gnu.org/licenses/>.
 */

package zzsoft.la.mathgame;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.Random;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.PorterDuff.Mode;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TableLayout;

/**
 * Main activity.
 * @author Luis ??ngel Fernndez Fernndez
 */
public class MainActivity extends Activity {

  private ArrayList<ArrayList<Integer>> m_randomDigits;
  private ArrayList<ArrayList<Character>> m_randomOperators;
  private ArrayList<Integer> m_results;
  private ArrayList<Integer> m_resultButtonsIDs;
  private Button m_buttonClicked;
  
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        // I'll initialize the board.
        initializeBoard();
        checkResults(null);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    @Override
    protected void onDestroy() {
      super.onDestroy();
      clearMemberLists();
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
      if (item.getItemId() == R.id.menu_new) {
        clearMemberLists();
        initializeBoard();
        checkResults(null);
      }
      if (item.getItemId() == R.id.menu_solve) {
        fillBoardWithSolution();
      }
      return super.onOptionsItemSelected(item);
    }
    
    /**
     * Fill the board with the solution.
     */
    private void fillBoardWithSolution() {
      TableLayout tl = (TableLayout)findViewById(R.id.MainLayout);
      int row = 0, column = 0;
      for (int i=0 ; i<tl.getChildCount() ; i++) {
        LinearLayout ll = (LinearLayout)tl.getChildAt(i);
        for (int j=0 ; j<ll.getChildCount() ; j++) {
          Button button = (Button)ll.getChildAt(j);
          //Resources res = getResources();
          if (button.isClickable()) {
            Integer number = m_randomDigits.get(row).get(column);
            button.setText(number.toString());
            if (column == m_randomDigits.get(row).size() - 1) {
              row += 2;
              column = 0;
            }
            else {
              ++column;
            }
          }
        } // for j
      } // for i
      // This will set all result buttons background to ok_color
      checkResults(m_results);
    }
    
    /**
     * This method will return one of the operators in the array array_operators.
     * @see array_operators
     * @return a Character with the random sign from array_operators.
     */
    private String getAnOperator() {          
      Resources res = getResources();
      Random randomGenerator = getRandomizeGenerator();
      
      String[] strArray = res.getStringArray(R.array.array_operators);
      int randomNumber = randomGenerator.nextInt(strArray.length);
      
      return strArray[randomNumber];
    }
    
    /**
     * This method will return a random Integer between 0 and 9.
     * @return an Integer between 0 and 9.
     */
    private Integer getADigit() {
      Random randomGenerator = getRandomizeGenerator();
      
      return randomGenerator.nextInt(10);
    }
    
    /**
     * This method will initialize the board.
     */
    public void initializeBoard() {
      m_buttonClicked = null;
      m_resultButtonsIDs = new ArrayList<Integer>();
      m_resultButtonsIDs.add(R.id.Button_result_row1);
      m_resultButtonsIDs.add(R.id.Button_result_row2);
      m_resultButtonsIDs.add(R.id.Button_result_row3);
      m_resultButtonsIDs.add(R.id.Button_result_column1);
      m_resultButtonsIDs.add(R.id.Button_result_column2);
      m_resultButtonsIDs.add(R.id.Button_result_column3);
      
      TableLayout tl = (TableLayout)findViewById(R.id.MainLayout);
      ArrayList<ArrayList<Character>> listOfOperators= new ArrayList<ArrayList<Character>>();
      ArrayList<ArrayList<Integer>> listOfDigits = new ArrayList<ArrayList<Integer>>();
      for (int i=0 ; i<tl.getChildCount() ; i++) {
        LinearLayout ll = (LinearLayout)tl.getChildAt(i);
        ArrayList<Character> rowOfOperators = new ArrayList<Character>();
        ArrayList<Integer> rowOfDigits = new ArrayList<Integer>();
        for (int j=0 ; j<ll.getChildCount() ; j++) {
          Button button = (Button)ll.getChildAt(j);
          //Resources res = getResources();
          if (!button.isClickable()) {
            // The button contains a sign label
            CharSequence charSeq = button.getText();
            String str = charSeq.toString();
            if (str != null && str.length() > 0 && isAnOperator(str.charAt(0))) {
              String strAux = getAnOperator();
              rowOfOperators.add(strAux.charAt(0));
              button.setText(strAux);
            }
          }
          else { // isClickable()
            // The button will contain a number, so let's generate the number
            // that will be part of the solution (at least one of them if there
            // is more than one).
            rowOfDigits.add(getADigit());
            button.setText("");
          }
        } // for j
        listOfOperators.add(rowOfOperators);
        listOfDigits.add(rowOfDigits);
      } // for i
      
      // Here I'll have a list with the digits
      // and a list with the signs I'll need to
      // do the math.
      
      // Let's fill the result cells.
      fillResultCells(listOfDigits, listOfOperators);
      if (m_randomDigits == null) m_randomDigits = new ArrayList<ArrayList<Integer>>();
      m_randomDigits.addAll(listOfDigits);
      if (m_randomOperators == null) m_randomOperators = new ArrayList<ArrayList<Character>>();
      m_randomOperators.addAll(listOfOperators);
    }
    
    /**
     * This method will get the numbers choosen by the user.
     * @return the numbers choosen by the user in the same format than m_results
     */
    public ArrayList<ArrayList<Integer>> getNumbersFromBoard() {
      TableLayout tl = (TableLayout)findViewById(R.id.MainLayout);
      ArrayList<ArrayList<Integer>> listOfDigits = new ArrayList<ArrayList<Integer>>();
      for (int i=0 ; i<tl.getChildCount() ; i++) {
        LinearLayout ll = (LinearLayout)tl.getChildAt(i);
        ArrayList<Integer> rowOfDigits = new ArrayList<Integer>();
        for (int j=0 ; j<ll.getChildCount() ; j++) {
          Button button = (Button)ll.getChildAt(j);
          //Resources res = getResources();
          if (button.isClickable()) {
            CharSequence buttonText = button.getText();
            if ((buttonText != null) && (buttonText.length() > 0)) {
              String buttonTextAsString = buttonText.toString();
              rowOfDigits.add(Integer.parseInt(buttonTextAsString));
            }
            else {
              rowOfDigits.add(Integer.valueOf(0));
            }
          }
        } // for j
        listOfDigits.add(rowOfDigits);
      } // for i

      return listOfDigits;
    }
    
    /**
     * This method will return a initialized random number generator.
     * @return A random number generator.
     */
    private Random getRandomizeGenerator() {
      String pattern = new String("S"); // milliseconds
      SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);
      int milliseconds = Integer.parseInt(dateFormat.format(new Date()));
      Random randomGenerator = new Random(milliseconds*milliseconds);

      return randomGenerator;
    }
    
    /**
     * This method will fill the buttons that will contain the results with the 
     * results values calculated.
     * @param digits the digits that will be part of the calculus.
     * @param operators the signs/operators used to do the math.
     */
    private void fillResultCells(ArrayList<ArrayList<Integer>> digits, 
        ArrayList<ArrayList<Character>> operators) {
      
      m_results = doTheMath(digits, operators);
      
      for (int i=0 ; i<m_resultButtonsIDs.size() ; i++) {
        Button resultButton = (Button)findViewById(m_resultButtonsIDs.get(i));
        resultButton.setText(m_results.get(i).toString());        
      }
    }
    
    /**
     * A method to clear member lists.
     */
    private void clearMemberLists() {    
      if (m_randomDigits != null) {
        Iterator<ArrayList<Integer>> itr = m_randomDigits.iterator();
        while (itr.hasNext()) {
          Iterator<ArrayList<Integer>> itrAux = itr;
          itr.next();
          itrAux.remove();
        }
        m_randomDigits = null;
      }
      if (m_randomOperators != null) {
        Iterator<ArrayList<Character>> itr = m_randomOperators.iterator();
        while (itr.hasNext()) {
          Iterator<ArrayList<Character>> itrAux = itr;
          itr.next();
          itrAux.remove();
        }
        m_randomOperators = null;
      }
      if (m_results != null) {
        m_results.clear();
        m_results = null;
      }
      if (m_resultButtonsIDs != null) {
        m_resultButtonsIDs.clear();
        m_resultButtonsIDs = null;
      }
    }
    
    /**
     * This method will check whether or not a Character is an operator.
     * @param ch the Character to check.
     * @return true if ch is an operator, false otherwise.
     */
    private Boolean isAnOperator(Character ch) {
      Resources res = getResources();
      
      String[] strArray = res.getStringArray(R.array.array_operators);
      for (int i=0 ; i<strArray.length ; i++) {
        if (strArray[i].contains(ch.toString())) {
          return true;
        }
      }
      if (ch == res.getString(R.string.button_label_operator_init).charAt(0)) {
        return true;
      }
      
      return false;
    }
    
    /**
     * This method will do the math.
     * @param digits the digits it'll use to do the math.
     * @param operators the operators it'll use to do the math.
     * @return an ArrayList of Integer with the results. First the results for
     * the rows (indexes 0, 1 and 2) then the columns (indexes 3, 4 and 5).
     */
    private ArrayList<Integer> doTheMath(ArrayList<ArrayList<Integer>> digits, 
        ArrayList<ArrayList<Character>> operators) {
      
      ArrayList<Integer> results = new ArrayList<Integer>();
      Integer result = Integer.valueOf(0);
      
      // First the rows
      for (int i=0 ; i<digits.size() ; i++) {
        ArrayList<Integer> list = digits.get(i);
        if (list.size() != 0) {
          result = list.get(0);
          for (int j=0 ; j<list.size()-1 ; j++) {
            Integer m = list.get(j+1);
            if (operators.get(i).get(j) == '+') {
              result += m; 
            }
            else if (operators.get(i).get(j) == '-') {
              result -= m;
            }
            else if (operators.get(i).get(j) == '') {
              result *= m;
            }
          }
          results.add(result);
        }
      }
      // Now the columns
      ArrayList<Integer> columnsResults = new ArrayList<Integer>(3);
      columnsResults.add(digits.get(0).get(0));
      columnsResults.add(digits.get(0).get(1));
      columnsResults.add(digits.get(0).get(2));
      for (int i=1 ; i<digits.size()-1 ; i++) {
        ArrayList<Integer> list = digits.get(i);
        if (list.size() != 0) {
          for (int j=0 ; j<list.size() ; j++) {
            Integer m = list.get(j);
            if (operators.get(i-1).get(j) == '+') {
              result = columnsResults.get(j);
              result += m;
              columnsResults.set(j, result);
            }
            else if (operators.get(i-1).get(j) == '-') {
              result = columnsResults.get(j);
              result -= m;
              columnsResults.set(j, result);
            }
            else if (operators.get(i-1).get(j) == '') {
              result = columnsResults.get(j);
              result *= m;
              columnsResults.set(j, result);
            }
          }
        }
      }
      
      results.addAll(columnsResults);
      
      return results;
    }
    
    /**
     * On click event handler.
     * @param v the view sending the event.
     */
    public void onClick(View v) {
      m_buttonClicked = (Button)v;
      Intent intent = new Intent(this, KeypadActivity.class);
      this.startActivityForResult(intent, 2);
    }
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == 2){
          String keyPressed = data.getExtras().get("key_pressed").toString();
          m_buttonClicked.setText(keyPressed);
          ArrayList<ArrayList<Integer>> numbers = new ArrayList<ArrayList<Integer>>();
          numbers = getNumbersFromBoard();
          ArrayList<Integer> results = doTheMath(numbers, m_randomOperators);
          // So now I have the results, let's compare them with the randomly
          // generated ones.
          checkResults(results);
        }
    }
    
    /**
     * Check if the results are correct. If the result for an operation is wrong
     * the background color of the button will be change to red. It will change
     * to green otherwise.
     * @param results The results obtained using the numbers choosen by the user.
     */
    private void checkResults(ArrayList<Integer> results) {
      int errorColor = getResources().getColor(R.color.error_color);
      int okColor = getResources().getColor(R.color.ok_color);
      
      for (int i=0 ; i<m_resultButtonsIDs.size() ; i++) {
        Button resultButton = (Button)findViewById(m_resultButtonsIDs.get(i));
        if (results != null 
            && (m_results.get(i).intValue() == results.get(i).intValue())) {
          resultButton.getBackground().setColorFilter(okColor, Mode.MULTIPLY);
        }
        else {
          resultButton.getBackground().setColorFilter(errorColor, Mode.MULTIPLY);
        }            
      }
    }
}

Java Source Code List

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