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      1 /*
      2  * Copyright (C) 2008 Google Inc.
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.demo.notepad3;
     18 
     19 import android.app.ListActivity;
     20 import android.content.Intent;
     21 import android.database.Cursor;
     22 import android.os.Bundle;
     23 import android.view.ContextMenu;
     24 import android.view.Menu;
     25 import android.view.MenuItem;
     26 import android.view.View;
     27 import android.view.ContextMenu.ContextMenuInfo;
     28 import android.widget.ListView;
     29 import android.widget.SimpleCursorAdapter;
     30 import android.widget.AdapterView.AdapterContextMenuInfo;
     31 
     32 public class Notepadv3 extends ListActivity {
     33     private static final int ACTIVITY_CREATE=0;
     34     private static final int ACTIVITY_EDIT=1;
     35 
     36     private static final int INSERT_ID = Menu.FIRST;
     37     private static final int DELETE_ID = Menu.FIRST + 1;
     38 
     39     private NotesDbAdapter mDbHelper;
     40     private Cursor mNotesCursor;
     41 
     42     /** Called when the activity is first created. */
     43     @Override
     44     public void onCreate(Bundle savedInstanceState) {
     45         super.onCreate(savedInstanceState);
     46         setContentView(R.layout.notes_list);
     47         mDbHelper = new NotesDbAdapter(this);
     48         mDbHelper.open();
     49         fillData();
     50         registerForContextMenu(getListView());
     51     }
     52 
     53     private void fillData() {
     54         // Get all of the rows from the database and create the item list
     55         mNotesCursor = mDbHelper.fetchAllNotes();
     56         startManagingCursor(mNotesCursor);
     57 
     58         // Create an array to specify the fields we want to display in the list (only TITLE)
     59         String[] from = new String[]{NotesDbAdapter.KEY_TITLE};
     60 
     61         // and an array of the fields we want to bind those fields to (in this case just text1)
     62         int[] to = new int[]{R.id.text1};
     63 
     64         // Now create a simple cursor adapter and set it to display
     65         SimpleCursorAdapter notes =
     66             new SimpleCursorAdapter(this, R.layout.notes_row, mNotesCursor, from, to);
     67         setListAdapter(notes);
     68     }
     69 
     70     @Override
     71     public boolean onCreateOptionsMenu(Menu menu) {
     72         super.onCreateOptionsMenu(menu);
     73         menu.add(0, INSERT_ID, 0, R.string.menu_insert);
     74         return true;
     75     }
     76 
     77     @Override
     78     public boolean onMenuItemSelected(int featureId, MenuItem item) {
     79         switch(item.getItemId()) {
     80             case INSERT_ID:
     81                 createNote();
     82                 return true;
     83         }
     84 
     85         return super.onMenuItemSelected(featureId, item);
     86     }
     87 
     88     @Override
     89     public void onCreateContextMenu(ContextMenu menu, View v,
     90             ContextMenuInfo menuInfo) {
     91         super.onCreateContextMenu(menu, v, menuInfo);
     92         menu.add(0, DELETE_ID, 0, R.string.menu_delete);
     93     }
     94 
     95     @Override
     96     public boolean onContextItemSelected(MenuItem item) {
     97         switch(item.getItemId()) {
     98             case DELETE_ID:
     99                 AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
    100                 mDbHelper.deleteNote(info.id);
    101                 fillData();
    102                 return true;
    103         }
    104         return super.onContextItemSelected(item);
    105     }
    106 
    107     private void createNote() {
    108         Intent i = new Intent(this, NoteEdit.class);
    109         startActivityForResult(i, ACTIVITY_CREATE);
    110     }
    111 
    112     @Override
    113     protected void onListItemClick(ListView l, View v, int position, long id) {
    114         super.onListItemClick(l, v, position, id);
    115         Cursor c = mNotesCursor;
    116         c.moveToPosition(position);
    117         Intent i = new Intent(this, NoteEdit.class);
    118         i.putExtra(NotesDbAdapter.KEY_ROWID, id);
    119         i.putExtra(NotesDbAdapter.KEY_TITLE, c.getString(
    120                 c.getColumnIndexOrThrow(NotesDbAdapter.KEY_TITLE)));
    121         i.putExtra(NotesDbAdapter.KEY_BODY, c.getString(
    122                 c.getColumnIndexOrThrow(NotesDbAdapter.KEY_BODY)));
    123         startActivityForResult(i, ACTIVITY_EDIT);
    124     }
    125 
    126     @Override
    127     protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    128         super.onActivityResult(requestCode, resultCode, intent);
    129         Bundle extras = intent.getExtras();
    130         switch(requestCode) {
    131             case ACTIVITY_CREATE:
    132                 String title = extras.getString(NotesDbAdapter.KEY_TITLE);
    133                 String body = extras.getString(NotesDbAdapter.KEY_BODY);
    134                 mDbHelper.createNote(title, body);
    135                 fillData();
    136                 break;
    137             case ACTIVITY_EDIT:
    138                 Long rowId = extras.getLong(NotesDbAdapter.KEY_ROWID);
    139                 if (rowId != null) {
    140                     String editTitle = extras.getString(NotesDbAdapter.KEY_TITLE);
    141                     String editBody = extras.getString(NotesDbAdapter.KEY_BODY);
    142                     mDbHelper.updateNote(rowId, editTitle, editBody);
    143                 }
    144                 fillData();
    145                 break;
    146         }
    147     }
    148 }
    149