Calculation

package com.droidacid.apticalc.tys;

import java.util.Timer;
import java.util.TimerTask;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

import com.droidacid.apticalc.MyActionBar;
import com.droidacid.apticalc.R;
import com.droidacid.apticalc.tys.model.Question;

public class FourCalculation extends MyActionBar implements OnClickListener {
	private static final String TAG = "CalculationActivity";

	Button bOne, bTwo, bThree, bFour, bFive, bSix, bSeven, bEight, bNine,
			bZero, bClear;
	TextView tvQuestions, tvAnswers, tvTimer, tvNumberOfQuestions;

	private CountDownTimer timer;

	private final static int EASY = 0;
	private final static int MEDIUM = 1;
	private final static int HARD = 2;
	private static final int ADDITION = 0;
	private static final int SUBTRACT = 1;
	private static final int MULTIPLY = 2;
	private static final int DIVIDE = 3;
	private static final int ALL = 4;

	int randomValue = (int) Math.random();
	int availableTime = 30;
	int num1, num2, result, rightAnswers, wrongAnswers, timeTaken;

	long starttime = 0;
	boolean timerGoingUp = true;
	boolean timerRunning;
	Timer upTimer = new Timer();

	private int mDifficulty, mQuestions;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.tys_four_calculate);
		initialize();
		questions();
		startTimer();
	}

	private void initialize() {
		Bundle getBasket = getIntent().getExtras();
		Bundle basket = getIntent().getExtras();
		mDifficulty = getBasket.getInt("difficulty", 0);
		mQuestions = basket.getInt("questionType", 0);

		String howDifficult;
		String QuestionType;

		if (mDifficulty == EASY)
			howDifficult = "Easy";
		if (mDifficulty == MEDIUM)
			howDifficult = "Medium";
		if (mDifficulty == HARD)
			howDifficult = "Hard";

		if (mQuestions == ADDITION)
			QuestionType = "Addition";
		if (mQuestions == SUBTRACT)
			QuestionType = "Subtraction";
		if (mQuestions == MULTIPLY)
			QuestionType = "Multiplication";
		if (mQuestions == DIVIDE)
			QuestionType = "Division";
		if (mQuestions == ALL)
			QuestionType = "All";

		tvQuestions = (TextView) findViewById(R.id.tv_tys_Questions);
		tvTimer = (TextView) findViewById(R.id.tv_tys_Timer);
		tvAnswers = (TextView) findViewById(R.id.tv_tys_Answers);
		tvNumberOfQuestions = (TextView) findViewById(R.id.tv_tys_NumberOfQuestions);

		bOne = (Button) findViewById(R.id.bOne);
		bTwo = (Button) findViewById(R.id.bTwo);
		bThree = (Button) findViewById(R.id.bThree);
		bFour = (Button) findViewById(R.id.bFour);
		bFive = (Button) findViewById(R.id.bFive);
		bSix = (Button) findViewById(R.id.bSix);
		bSeven = (Button) findViewById(R.id.bSeven);
		bEight = (Button) findViewById(R.id.bEight);
		bNine = (Button) findViewById(R.id.bNine);
		bZero = (Button) findViewById(R.id.bZero);
		bClear = (Button) findViewById(R.id.bClear);

		bOne.setOnClickListener(this);
		bTwo.setOnClickListener(this);
		bThree.setOnClickListener(this);
		bFour.setOnClickListener(this);
		bFive.setOnClickListener(this);
		bSix.setOnClickListener(this);
		bSeven.setOnClickListener(this);
		bEight.setOnClickListener(this);
		bNine.setOnClickListener(this);
		bZero.setOnClickListener(this);
		bClear.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		if (!timerRunning)
			return;

		switch (v.getId()) {
		case R.id.bOne:
			tvAnswers.setText(tvAnswers.getText().toString() + "1");
			break;
		case R.id.bTwo:
			tvAnswers.setText(tvAnswers.getText().toString() + "2");
			break;
		case R.id.bThree:
			tvAnswers.setText(tvAnswers.getText().toString() + "3");
			break;
		case R.id.bFour:
			tvAnswers.setText(tvAnswers.getText().toString() + "4");
			break;
		case R.id.bFive:
			tvAnswers.setText(tvAnswers.getText().toString() + "5");
			break;
		case R.id.bSix:
			tvAnswers.setText(tvAnswers.getText().toString() + "6");
			break;
		case R.id.bSeven:
			tvAnswers.setText(tvAnswers.getText().toString() + "7");
			break;
		case R.id.bEight:
			tvAnswers.setText(tvAnswers.getText().toString() + "8");
			break;
		case R.id.bNine:
			tvAnswers.setText(tvAnswers.getText().toString() + "9");
			break;
		case R.id.bZero:
			tvAnswers.setText(tvAnswers.getText().toString() + "0");
			break;
		case R.id.bClear:
			if (tvAnswers.getText().length() > 0) {
				String txt = tvAnswers.getText().toString();
				tvAnswers.setText(txt.substring(0, txt.length() - 1));
			}
			break;
		}

		if (tvAnswers.getText().length() == String.valueOf(result).length()) {
			verifyAnswer();
		}

	}

	private void questions() {
		int numberOfQuestions = 0;
		switch (mDifficulty) {
		case EASY:
			numberOfQuestions = 10;
			break;
		case MEDIUM:
			numberOfQuestions = 15;
			break;
		case HARD:
			numberOfQuestions = 20;
			break;
		}
		Log.w(TAG, "new set questions");
		if ((rightAnswers + wrongAnswers) >= numberOfQuestions) {
			calculateScore();

			return;
		}

		Question mQuestion = new Question(mQuestions, mDifficulty);
		tvQuestions.setText(mQuestion.getCalculation());
		result = mQuestion.getResult();
	}

	@SuppressWarnings("deprecation")
	public void verifyAnswer() {

		if (result == Integer.valueOf((String) tvAnswers.getText())) {
			rightAnswers++;
			tvNumberOfQuestions.setText(Integer.toString(rightAnswers) + "/"
					+ Integer.toString(rightAnswers + wrongAnswers));
			tvNumberOfQuestions.setTextColor(Color.GREEN);
		} else {
			wrongAnswers++;
			tvNumberOfQuestions.setText(Integer.toString(rightAnswers) + "/"
					+ Integer.toString(rightAnswers + wrongAnswers));
			tvNumberOfQuestions.setTextColor(Color.RED);

			AlertDialog wrongDialog = new AlertDialog.Builder(this).create();
			wrongDialog.setCancelable(false);
			wrongDialog.setTitle("Wrong Answer");
			wrongDialog.setMessage("Right answer is : " + result);
			wrongDialog.setButton("Ok", new DialogInterface.OnClickListener() {

				@Override
				public void onClick(DialogInterface dialog, int which) {
					dialog.cancel();

				}
			});
			wrongDialog.show();
		}

		tvAnswers.setText("");
		questions();
	}

	private void calculateScore() {
		int score = 0;
		if (timerGoingUp) {
			score = (10 * (rightAnswers) - 5 * (wrongAnswers)) - timeTaken;
		} else {
			score = (10 * (rightAnswers) - 5 * (wrongAnswers))
					+ Integer.valueOf(tvTimer.getText().toString());
		}

		stopTimer();
		scoreActivity(score);
		rightAnswers = 0;
		wrongAnswers = 0;
	}

	private void scoreActivity(int score) {
		Intent scoresCalc = new Intent(this, TYSScores.class);
		Bundle scored = new Bundle();
		scored.putInt("rightanswers", rightAnswers);
		scored.putInt("wronganswers", wrongAnswers);
		scored.putInt("score", score);

		scoresCalc.putExtras(scored);
		startActivity(scoresCalc);
		finish();

	}

	private void stopTimer() {
		upTimer.cancel();
		upTimer.purge();
		if (timer != null)
			timer.cancel();
		timer = null;
		timerRunning = false;
	}

	private void startTimer() {
		if (timerGoingUp) {
			starttime = System.currentTimeMillis();
			upTimer = new Timer();
			upTimer.schedule(new MyUpTimer(), 0, 500);
		} else {
			showDownTimer();
		}
		timerRunning = true;
	}

	private void showDownTimer() {
		if (timer != null)
			timer.cancel();
		timer = new CountDownTimer(availableTime * 1000, 10) {
			@Override
			public void onTick(long millisUntilFinished) {
				tvTimer.setText(Long.toString(millisUntilFinished / 1000));
			}

			@Override
			public void onFinish() {
				calculateScore();
			}
		}.start();

	}

	class MyUpTimer extends TimerTask {
		@Override
		public void run() {
			runOnUiThread(new Runnable() {
				@Override
				public void run() {
					long millis = System.currentTimeMillis() - starttime;
					int seconds = (int) (millis / 1000);
					timeTaken = seconds;
					int minutes = seconds / 60;
					seconds = seconds % 60;
					tvTimer.setText(String.format("%d:%02d", minutes, seconds));
				}
			});
		}
	}
}