Android Open Source - OpenHSK Quiz Service

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Back to project page OpenHSK.

License

The source code is released under:

This work is licensed under a Creative Commons Attribution 3.0 Unported License. Original author of word lists: http://lingomi.com/ Original author of definitions: http://cc-cedict.org Original autho...

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Java Source Code

package edu.openhsk.service;
//from  w  ww  . j ava 2 s . c  o  m
import java.util.List;
import java.util.Random;

import android.util.Log;
import edu.openhsk.models.QuizHanzi;
import edu.openhsk.repository.DatabaseMetadata;

public class QuizService {
  private static final String LOG_TAG = QuizService.class.getSimpleName();
  
  public int chooseCorrectAnswer(List<QuizHanzi> quizWordList) {
    //randomizes index and answer
    if (quizWordList != null && quizWordList.size() == 4) {
      int randInt = -1;
      randInt = new Random(System.currentTimeMillis()).nextInt(4);
      int idOfAnswer = quizWordList.get(randInt).getId();
      Log.d(LOG_TAG, "Index of answer: " + randInt + 
          " Id of answer: " + idOfAnswer);
      return idOfAnswer;
    } else {
      throw new RuntimeException("List is null or has invalid number of elements");
    }
  }
  
  public String getFilePathByWordList(int wordListId) {
    String filePath = "";
    if (wordListId == DatabaseMetadata.WORD_LIST_ID_HSK1) {
      filePath = "hsk1_sounds/";
    } else if (wordListId == DatabaseMetadata.WORD_LIST_ID_HSK2) {
      filePath = "hsk2_sounds/";
    }
    return filePath;
  }
  
  public static int getCachedHighestId(int[] shuffledIds) {
    int max = -1;
    for (int i : shuffledIds) {
      if (i > max) max = i;
    }
    return max;
  }
  
  public static int[] unmarshallWordIds(String marshalledWordIds) {
    String[] splitWordIdStrings = marshalledWordIds.split(",");
    int[] wordIds = new int[splitWordIdStrings.length];
    for (int i = 0; i < splitWordIdStrings.length; i++) {
      wordIds[i] = Integer.parseInt(splitWordIdStrings[i]);
    }
    return wordIds;
  }
  
  public static String marshallWordIds(int... wordIds) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < wordIds.length; i++) {
      if (i != 0) {
        sb.append(",");
      }
      sb.append(wordIds[i]);
    }
    return sb.toString();
  }
}

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