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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 *  This is a part of amfontai Notes/*from  w ww  . ja va  2  s  .  com*/
 *  Copyright (C) 2013 Andrew Fontaine
 *
 *  amfontai Notes program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  amfontai Notes program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 *  DatePickerDialog code adapted from
 *  http://developer.android.com/guide/topics/ui/controls/pickers.html
 */

package com.amfontai.cmput301asn1;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;

/**
 * The Class NoteDetail represents a create/edit/delete window for
 * {@link Note}. It sends the note to the {@link NotesDb} to be
 * saved, or the ID of the note to be deleted.
 */
@SuppressLint("SimpleDateFormat")
public class NoteDetail extends Activity implements DatePickerDialog.OnDateSetListener {
  
  /**
   * mDb is an instance of (@link NotesDb}, which controls
   * access to the {@link android.database.SQLiteDatabase}.
   */
  private NotesDb mDb = new NotesDb(NotesDb.WRITE, this);
  
  /**
   * the {@link android.database.SQLiteDatabase} ID of the
   * {@link Note} instance. -1 if the note is new.
   */
  private int mId;
  
  /** 
   * An instance of {@link Note} that 
   * The activity shows.
   */
  private Note mNote;

  /**
   * On creation of the note, the {@link android.app.Activity}
   * gets the {@link ndroid.content.Intent}
   * passed to it by the parent window
   * and looks for an {@link mId} number to seach {@link NotesDb} for.
   * 
   * If there is no ID in the intent, the ID defaults to -1,
   * and the entries are filled with the default:
   * 
   * Subject: Blank,
   * Date: The current date,
   * Content: Blank
   * 
   * @see android.app.Activity#onCreate(android.os.Bundle)
   */
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_note_detail);
    // Show the Up button in the action bar.
    setupActionBar();
    
    Intent intent = getIntent();
    
    mId = intent.getIntExtra("com.amfontai.cmput301asn1.id", -1);
    
    Button date = (Button) findViewById(R.id.date);

    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
    
    /* 
     * If there is an ID in the intent, query the database and fill
     * the fields with the saved data.
     */
    if(-1 != mId) {
      mNote = mDb.getNoteById(mId);
      EditText subject = (EditText) findViewById(R.id.subject);
      subject.setText(mNote.getSubject());
      
      date.setText(mNote.getDate());
      EditText content = (EditText) findViewById(R.id.content);
      content.setText(mNote.getContent());
    }
    /* 
     * If not, set the date to the current date and
     * leave the other fields blank
     */
    else {
      date.setText(format.format(new Date()));
      mNote = new Note();
    }
  }

  /**
   * Set up the {@link android.app.ActionBar}.
   */
  private void setupActionBar() {

    getActionBar().setDisplayHomeAsUpEnabled(true);

  }

  /**
   * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)
   */
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.note_detail, menu);
    return true;
  }
  
  /**
   * Saves the note before pausing the Activity
   * 
   * @see android.app.Activity#onPause()
   */
  @Override
  public void onPause() {
    super.onPause();
    saveNote();
  }

  /**
   * Reads in the selected menu item
   * and performs the appropriate task.
   * 
   * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)
   */
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case android.R.id.home:
      // This ID represents the Home or Up button. In the case of this
      // activity, the Up button is shown. Use NavUtils to allow users
      // to navigate up one level in the application structure. For
      // more details, see the Navigation pattern on Android Design:
      //
      // http://developer.android.com/design/patterns/navigation.html#up-vs-back
      //
      
      
      NavUtils.navigateUpFromSameTask(this);
      return true;
    case R.id.action_trash:
      deleteNote();
      NavUtils.navigateUpFromSameTask(this);
      return true;
    }
    return super.onOptionsItemSelected(item);
  }
  
  /**
   * Save the {@link mNote} when the save button is
   * pressed.
   *
   * @param v The View
   */
  public void saveNote(View v) {
    finish();
  }
  
  /**
   * Saves the {@link mNote} by
   * setting the appropriate fields
   * and passing it the {@link mId} and
   * {@link mDb}, so it can be saved to the
   * {@link android.database.SQLiteDatabase}
   */
  public void saveNote() {
    mNote.setSubject(((EditText) findViewById(R.id.subject)).getText().toString());
    mNote.setDate(((Button) findViewById(R.id.date)).getText().toString());
    mNote.setContent(((EditText) findViewById(R.id.content)).getText().toString());
    mNote.saveNote(mId, mDb);
    
  }

  /**
   * Delete the note by passing it the {@link mId} and {@link mDb}.
   */
  private void deleteNote() {
    mNote.deleteNote(mId, mDb);
    
  }

  /**
   * Sets the text of the button to the date selected in the
   * date picker.
   * 
   * @see android.app.DatePickerDialog.OnDateSetListener#onDateSet(android.widget.DatePicker, int, int, int)
   */
  @Override
  public void onDateSet(DatePicker view, int year, int monthOfYear,
      int dayOfMonth) {
    Button date = (Button) findViewById(R.id.date);
    Calendar c = Calendar.getInstance();
    c.set(year, monthOfYear, dayOfMonth);
    date.setText(new SimpleDateFormat("yyyy-MM-dd").format(c.getTime()));
    
  }
  
  /**
   * Show date picker dialog.
   *
   * @param v the v
   */
  public void showDatePickerDialog(View v) {
    DialogFragment newFragment = new DatePickerFragment();
    newFragment.show(getFragmentManager(), "datePicker");
  }
  
  /**
   * The Class DatePickerFragment brings up an
   * android {@link android.app.DatePickerDialog}
   */
  public static class DatePickerFragment extends DialogFragment {
    
    /**
     * @see android.app.DialogFragment#onCreateDialog(android.os.Bundle)
     */
    public Dialog onCreateDialog(Bundle savedInstanceState) {
      SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
      
      Button date = (Button) ((NoteDetail) getActivity()).findViewById(R.id.date);
      
      
      Calendar c = Calendar.getInstance();
      
      try {
        c.setTime(format.parse((String) date.getText()));
      } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
      
      return new DatePickerDialog(getActivity(),
          (NoteDetail) getActivity(), c.get(Calendar.YEAR),
          c.get(Calendar.MONTH), c.get(Calendar.DATE));
    }
    
  }

}

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