Android Open Source - EasyNote Note Data Source

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License

The source code is released under:

This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a co...

Java Source Code

package com.manustudios.easynote;
/*from w  w w .  j a  va  2  s  .co m*/
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.SortedSet;
import java.util.TreeSet;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.SharedPreferences;

public class NoteDataSource {

  private static final String PREFTITLE = "title";
  private static final String PREFKEY = "notes";
  private static final String PREFDATE = "dates";
  
  private SharedPreferences noteTitlePrefs;
  private SharedPreferences notePrefs;
  private SharedPreferences noteDatePrefs;
  
  //EXPLICIT SELFINSTANCE
  public NoteDataSource(Context context){
    noteTitlePrefs = context.getSharedPreferences(PREFTITLE, Context.MODE_PRIVATE);
    notePrefs = context.getSharedPreferences(PREFKEY, Context.MODE_PRIVATE);
    noteDatePrefs = context.getSharedPreferences(PREFDATE, Context.MODE_PRIVATE);
  }
  
  public List<NoteItem> findAll(){
    Map<String, ?> titleMap = noteTitlePrefs.getAll();
    Map<String, ?> notesMap = notePrefs.getAll();    //GET ALL NOTES AS A MAP OBJECT
    Map<String, ?> datesMap = noteDatePrefs.getAll();   //GET ALL DATES AS MAP OBJECT
    
    SortedSet<String> keys = new TreeSet<String>(notesMap.keySet()); //ORGANIZE THE KEYS    
    
    List<NoteItem> noteList = new ArrayList<NoteItem>();
    
    for (String key : keys) {
      NoteItem note = new NoteItem();
      note.setKey(key);
      note.setTitle((String) titleMap.get(key));
      note.setText((String) notesMap.get(key));
      note.setDate((String) datesMap.get(key));
      noteList.add(note);
    }
    
    
    
    return orderNotes(noteList);
  }
  
  //UPDATE NOTE
  public boolean update(NoteItem note){
    
    SharedPreferences.Editor titleEditor = noteTitlePrefs.edit();
    titleEditor.putString(note.getKey(), note.getTitle());
    titleEditor.commit();
    
    SharedPreferences.Editor editor = notePrefs.edit();
    editor.putString(note.getKey(), note.getText());
    editor.commit();
    
    SharedPreferences.Editor dateEditor = noteDatePrefs.edit();
    dateEditor.putString(note.getKey(), getDate());
    dateEditor.commit();
    
    return true;
  }
  
  //DELETE NOTE
  public boolean remove(NoteItem note){
    
    if(notePrefs.contains(note.getKey())){
      SharedPreferences.Editor titleEditor = noteTitlePrefs.edit();
      titleEditor.remove(note.getKey());
      titleEditor.commit();
      
      SharedPreferences.Editor editor = notePrefs.edit();
      editor.remove(note.getKey());
      editor.commit();
    }
    return true;
  }
  
  //GET CURRENT DATE
  @SuppressLint("SimpleDateFormat")
  public String getDate(){
    Locale locale = new Locale("en_US");
    Locale.setDefault(locale);
    
    String pattern = "yyyy-MM-dd HH:mm:ss Z";
    SimpleDateFormat formatter = new SimpleDateFormat(pattern);
    String date =formatter.format(new Date());
    
    
    return date;
  }
  
  public List<NoteItem> orderNotes(List<NoteItem> notes){
  
    
    Collections.sort(notes, new Comparator<NoteItem>(){
          public int compare(NoteItem obj1, NoteItem obj2)
          {

                return obj1.getDate().compareToIgnoreCase(obj2.getDate());
          }
    });
    
    Collections.reverse(notes);
    
    return notes;
  }
  
  
}

Java Source Code List

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