root/trunk/Notepadv2/src/com/android/demo/notepad2/Notepadv2.java

/*
 * Copyright (C) 2008 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.demo.notepad2;

import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.AdapterView.AdapterContextMenuInfo;

public class Notepadv2 extends ListActivity {
    private static final int ACTIVITY_CREATE=0;
    private static final int ACTIVITY_EDIT=1;
    
    private static final int INSERT_ID = Menu.FIRST;
    private static final int DELETE_ID = Menu.FIRST + 1;

    private NotesDbAdapter mDbHelper;
    private Cursor mNotesCursor;
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.notes_list);
        mDbHelper = new NotesDbAdapter(this);
        mDbHelper.open();
        fillData();
        registerForContextMenu(getListView());
    }
    
    private void fillData() {
        // Get all of the rows from the database and create the item list
        mNotesCursor = mDbHelper.fetchAllNotes();
        startManagingCursor(mNotesCursor);
        
        // Create an array to specify the fields we want to display in the list (only TITLE)
        String[] from = new String[]{NotesDbAdapter.KEY_TITLE};
        
        // and an array of the fields we want to bind those fields to (in this case just text1)
        int[] to = new int[]{R.id.text1};
        
        // Now create a simple cursor adapter and set it to display
        SimpleCursorAdapter notes = 
                    new SimpleCursorAdapter(this, R.layout.notes_row, mNotesCursor, from, to);
        setListAdapter(notes);
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        menu.add(0, INSERT_ID,0, R.string.menu_insert);
        return true;
    }

    @Override
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        switch(item.getItemId()) {
        case INSERT_ID:
            createNote();
            return true;
        }
        
        return super.onMenuItemSelected(featureId, item);
    }

    @Override
        public void onCreateContextMenu(ContextMenu menu, View v,
                        ContextMenuInfo menuInfo) {
                super.onCreateContextMenu(menu, v, menuInfo);
                
        // TODO: fill in rest of method
                menu.add(0,DELETE_ID,0,R.string.menu_delete);
        }

    @Override
        public boolean onContextItemSelected(MenuItem item) {
        switch(item.getItemId()){
                case DELETE_ID:
                        AdapterContextMenuInfo info = (AdapterContextMenuInfo)item.getMenuInfo();
                        mDbHelper.deleteNote(info.id);
                        fillData();
                        return true;
        }
                return super.onContextItemSelected(item);
                
        // TODO: fill in rest of method
        }

    private void createNote() {
        // TODO: fill in implementation
        Intent i = new Intent(this,NoteEdit.class);
        startActivityForResult(i, ACTIVITY_CREATE);
    }
    
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);

        // TODO: fill in rest of method
        Cursor c = mNotesCursor;
        c.moveToPosition(position);
        Intent i = new Intent(this,NoteEdit.class);
        i.putExtra(NotesDbAdapter.KEY_ROWID, id);
        i.putExtra(NotesDbAdapter.KEY_TITLE, c.getString(
                        c.getColumnIndexOrThrow(NotesDbAdapter.KEY_TITLE)
                )
        );
        i.putExtra(NotesDbAdapter.KEY_BODY, c.getString(
                        c.getColumnIndexOrThrow(NotesDbAdapter.KEY_BODY)
                )
        );
        startActivityForResult(i, ACTIVITY_EDIT);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);
        
        // TODO: fill in rest of method
        Bundle extras = intent.getExtras();
        
        switch(requestCode){
                case ACTIVITY_CREATE:
                        String title =extras.getString(NotesDbAdapter.KEY_TITLE);
                        String body = extras.getString(NotesDbAdapter.KEY_BODY);
                        mDbHelper.createNote(title, body);
                        fillData();
                        break;
                case ACTIVITY_EDIT:
                        Long mRowId = extras.getLong(NotesDbAdapter.KEY_ROWID);
                        if(mRowId != null){
                                String editTitle = extras.getString(NotesDbAdapter.KEY_TITLE);
                                String editBody = extras.getString(NotesDbAdapter.KEY_BODY);
                                mDbHelper.updateNote(mRowId, editTitle, editBody);
                        }
                        fillData();
                        break;
        }
    }
}