Android Open Source - SCBIO-OneButtonLarry Highscore Manager

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Back to project page SCBIO-OneButtonLarry.

License

The source code is released under:

MIT License

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Java Source Code

package org.scbio.onebuttonlarry;
//ww  w.j a  v a  2  s.com
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.Context;
import android.content.SharedPreferences;
import android.util.Log;

public class HighscoreManager {
  
  private static final String TAG = HighscoreManager.class.toString();
  
  public static boolean updateHighscores(Context context, Highscore highscore){
    ArrayList<Highscore> list = loadHighscores(context);
    list.add(highscore);
    return storeHighscore(context, list);
  }
  
  public static boolean storeHighscore(Context context, ArrayList<Highscore> list){
    SharedPreferences mSharedPreferences = context.getSharedPreferences("highscores", Context.MODE_PRIVATE);
    SharedPreferences.Editor prefEditor = mSharedPreferences.edit();
    
    prefEditor.putString("highscores", parseHighscoreArray(list));
    return prefEditor.commit();
  }
  
  public static ArrayList<Highscore> loadHighscores(Context context){
    SharedPreferences mSharedPreferences = context.getSharedPreferences("highscores", Context.MODE_PRIVATE);
    return parseHighscoreJSON(mSharedPreferences.getString("highscores", ""));
  }
  
  public static ArrayList<Highscore> parseHighscoreJSON(String jsonStr) {

    ArrayList<Highscore> result = new ArrayList<Highscore>();
    JSONObject scores;
    
    try {
      scores = new JSONObject(jsonStr);
      JSONArray list = scores.getJSONArray("highscores");
      for (int i=0; i<list.length(); i++) {
        JSONObject player = list.getJSONObject(i);
        String name = player.getString("player");
        long score = player.getInt("score");
        
        result.add(new Highscore(name, score));
      }
    } catch (JSONException e) {
      Log.e(TAG, "Error @ parseHighscoreJSON()");
      e.printStackTrace();
    }

    return result;
  }

  public static String parseHighscoreArray(ArrayList<Highscore> list){
    
    Collections.sort(list, new Comparator<Highscore>() { // Sort rising values.
      public int compare(Highscore o1, Highscore o2){
        if(o1.getScore() == o2.getScore())
          return 0;
        return o1.getScore() < o2.getScore() ? -1 : 1;
      }
    });
    
    JSONArray jsonArray = new JSONArray();
    for (int i = 0; (i<5)&(i<list.size()); i++) 
    {
      JSONObject highscore = new JSONObject();
      try {
        highscore.put("player", list.get(i).getPlayer());
        highscore.put("score", list.get(i).getScore());
        jsonArray.put(highscore);
      } 
      catch (JSONException e) 
      {
        Log.e(TAG, "Error @ parseHighscoreArray()");
        e.printStackTrace();
      }
    }

    JSONObject scoresObj = new JSONObject();
    try {
      scoresObj.put("highscores", jsonArray);
    } catch (JSONException e) {
      Log.e(TAG, "Error @ parseHighscoreArray()");
      e.printStackTrace();
    }

    return(scoresObj.toString());
  }

}

Java Source Code List