Android Open Source - android-quiz-php Quiz

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License

The source code is released under:

Copyright (c) 2014, Fabricio Bedeschi All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are me...

Java Source Code

package com.quiz.php.core;
// w  ww . j  av a2s.  com
import android.content.Context;
import android.content.SharedPreferences;
import android.os.CountDownTimer;
import android.preference.PreferenceManager;
import android.util.Log;

import com.quiz.php.ui.SettingsActivity;
import com.quiz.php.persistence.DBHelper;
import com.quiz.php.ui.TimePickerDialogPreference;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.TimeZone;

/**
 * Created by fabricio on 1/29/14.
 */
public class Quiz {

    private static Quiz sQuiz;
    private final SharedPreferences mPrefs;

    private ArrayList<Question> mQuestions;
    private Context mContext;

    private Boolean mIsFinish;
    private String mTime;

    //time left control
    private CountDownTimer mTimer;

    public Quiz(Context context){
        mContext = context;
        mPrefs = PreferenceManager.getDefaultSharedPreferences(mContext);
        startQuiz();
    }

    public void reset() {
        sQuiz = null;
        mTimer.cancel();
    }

    public static Quiz get (Context context) {
        if (sQuiz == null) {
            sQuiz = new Quiz(context.getApplicationContext());
        }
        return sQuiz;
    }

    public Question getQuestion(int index) {
        return mQuestions.get(index);
    }

    public int getNumQuestions() {
        return mQuestions.size();
    }

    public void startQuiz () {
        setIsFinish(false);

        int num_questions = mPrefs.getInt(SettingsActivity.PREF_NUM_QUESTIONS, 0);

        String type = mPrefs.getString(SettingsActivity.PREF_TYPE, null);

        Log.d("quiz", String.format("Selected type %s", type));

        //get questions
        DBHelper helper = new DBHelper(mContext);
        mQuestions = helper.getRandomQuestions(num_questions, type);

        startTimer();

    }

    public ArrayList<Question> getQuestions() {
        return mQuestions;
    }

    public String getTime() {
        return mTime;
    }

    public Boolean isFinish() {
        return mIsFinish;
    }

    public void setIsFinish(Boolean mIsFinish) {
        this.mIsFinish = mIsFinish;

        if (mTimer != null && mIsFinish) {
            mTimer.cancel();
        }
    }

    public void startTimer() {
        String time = mPrefs.getString(SettingsActivity.PREF_TIME, null);

        //first run
        if (time == null) {
            time = TimePickerDialogPreference.DEFAULT_TIME;
        }

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        sdf.setTimeZone(TimeZone.getTimeZone("UTC"));

        Date date = null;
        try {
            date = sdf.parse("1970-01-01 "+ time +":00");


        } catch (ParseException e) {
            e.printStackTrace();
        }

        long timeLimit = date.getTime() ;


        mTimer = new CountDownTimer(timeLimit, 1000) {
            @Override
            public void onTick(long millisUntilFinished) {
                //@todo store millisUntilFinished for pause feature

                int seconds = (int) (millisUntilFinished / 1000) % 60 ;
                int minutes = (int) ((millisUntilFinished / (1000*60)) % 60);
                int hours   = (int) ((millisUntilFinished / (1000*60*60)) % 24);

                Log.d("pref", String.valueOf(minutes ) + " : " + String.valueOf(seconds));

                mTime = String.format("%d:%02d:%02d", hours, minutes, seconds);
            }

            @Override
            public void onFinish() {
                sQuiz.setIsFinish(true);
            }

        }.start();
    }
}

Java Source Code List

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