Android Open Source - MyJournal Journal

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.shane87.myjournal;
/*from   w ww  .j ava2  s. c  om*/
import java.util.ArrayList;

import com.shane87.myjournal.JournalContract.JournalDb;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;
import android.widget.Toast;

public class Journal{
  
  private final static String TAG = "MyJournal.Journal";
  private JournalDbHelper mDbHelper;
  private Context appContext;
  private ArrayList<JournalEntry> entries;
  
  Journal(Context context)
  {
    Log.v(TAG, "Begining constructor");
    appContext = context;
    Log.v(TAG, "Saved context");
    mDbHelper = new JournalDbHelper(context);
    Log.v(TAG, "JournalDbHelper object instantiated!");
    entries = new ArrayList<JournalEntry>(20);
    Log.v(TAG, "entries ArrayList created!");
    getEntries();
    Log.v(TAG, "getEntries returned!");
  }
  
  public void createNewEntry(String title, String entry, String date, String time)
  {
    int newId = getNewId();
    SQLiteDatabase db = mDbHelper.getWritableDatabase();
    entries.add(0, new JournalEntry(newId, title, entry, date, time));
    
    ContentValues values = new ContentValues();
    values.put(JournalDb.getColumnNameEntryId(), newId);
    values.put(JournalDb.getColumnNameTitle(), title);
    values.put(JournalDb.getColumnNameEntry(), entry);
    values.put(JournalDb.getColumnNameDate(), date);
    values.put(JournalDb.getColumnNameTime(), time);
    
    long newRowId = db.insert(JournalDb.getTableName(), null, values);
    if (newRowId == -1)
    {
      entries.remove(0);
      Toast toast = Toast.makeText(appContext, R.string.entryCreateErrorToast, Toast.LENGTH_LONG);
      toast.show();
    }
  }
  
  public ArrayList<JournalEntry> getEntriesList()
  {
    return entries;
  }
  
  private void getEntries()
  {
    Log.v(TAG, "Starting getEntries()!");
    String[] projection = {JournalDb.getColumnNameUniqueId(), JournalDb.getColumnNameEntryId(),
        JournalDb.getColumnNameTitle(), JournalDb.getColumnNameEntry(),
        JournalDb.getColumnNameDate(), JournalDb.getColumnNameTime()};
    Log.v(TAG, "Projection defined!");
    String sortorder = JournalDb.getColumnNameEntryId() + " DESC";
    Log.v(TAG, "Sort order defined!");
    SQLiteDatabase db = mDbHelper.getReadableDatabase();
    Cursor cursor = db.query(JournalDb.getTableName(), projection, null, null, null, null, sortorder, "10");
    Log.v(TAG, "DB queried!");
    
    if (cursor.getCount() == 0)
    {
      Log.v(TAG, "DB empty!");
      return;
    }
    
    cursor.moveToFirst();
    
    int idIndex = cursor.getColumnIndex(JournalDb.getColumnNameEntryId());
    int titleIndex = cursor.getColumnIndex(JournalDb.getColumnNameTitle());
    int entryIndex = cursor.getColumnIndex(JournalDb.getColumnNameEntry());
    int dateIndex = cursor.getColumnIndex(JournalDb.getColumnNameDate());
    int timeIndex = cursor.getColumnIndex(JournalDb.getColumnNameTime());
    
    for (int i = 0; i < 20; i++)
    {
      entries.add(i, new JournalEntry(
          cursor.getInt(idIndex),
          cursor.getString(titleIndex),
          cursor.getString(entryIndex),
          cursor.getString(dateIndex),
          cursor.getString(timeIndex)));
      if (cursor.isLast())
        break;
      cursor.moveToNext();
    }
  }
  
  private int getNewId()
  {
    String[] projection = { JournalDb.getColumnNameUniqueId(), JournalDb.getColumnNameEntryId() };
    String sortorder = JournalDb.getColumnNameEntryId() + " DESC";
    SQLiteDatabase db = mDbHelper.getWritableDatabase();
    
    Cursor cursor = db.query(JournalDb.getTableName(), projection, null, null, null, null, sortorder, "10");
    
    if (cursor.getCount() == 0)
      return 1;
    
    cursor.moveToFirst();
    
    return cursor.getInt(cursor.getColumnIndex(JournalDb.getColumnNameEntryId())) + 1;
  }
}

Java Source Code List

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