2011.09.26（4）——— android sample之Notepad(BaseColums)
2011.09.26（4）——— android sample之Notepad(BaseColums)
一个小知识
参考：http://book.51cto.com/art/200907/140494.htm
NotePad .java
/* * Copyright (C) 2007 The Android Open Source Project * * 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.example.android.notepad;import android.net.Uri;import android.provider.BaseColumns;/** * Convenience definitions for NotePadProvider */public final class NotePad { public static final String AUTHORITY = "com.google.provider.NotePad"; // This class cannot be instantiated private NotePad() {} /** * Notes table */ public static final class Notes implements BaseColumns { // This class cannot be instantiated private Notes() {} /** * The content:// style URL for this table */ public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/notes"); /** * The MIME type of {@link #CONTENT_URI} providing a directory of notes. */ public static final String CONTENT_TYPE = "vnd.android.cursor.dir/vnd.google.note"; /** * The MIME type of a {@link #CONTENT_URI} sub-directory of a single note. */ public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/vnd.google.note"; /** * The default sort order for this table */ public static final String DEFAULT_SORT_ORDER = "modified DESC"; /** * The title of the note * <P>Type: TEXT</P> */ public static final String TITLE = "title"; /** * The note itself * <P>Type: TEXT</P> */ public static final String NOTE = "note"; /** * The timestamp for when the note was created * <P>Type: INTEGER (long from System.curentTimeMillis())</P> */ public static final String CREATED_DATE = "created"; /** * The timestamp for when the note was last modified * <P>Type: INTEGER (long from System.curentTimeMillis())</P> */ public static final String MODIFIED_DATE = "modified"; }}package android.provider;public interface BaseColumns{ /** * The unique ID for a row. * <P>Type: INTEGER (long)</P> */ public static final String _ID = "_id"; /** * The count of rows in a directory. * <P>Type: INTEGER</P> */ public static final String _COUNT = "_count";}