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@ -2,16 +2,16 @@
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* 你可以在不违反许可协议的情况下使用此文件。
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* 你可以在以下地址获取许可证的副本：
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* 除非适用法律要求或书面同意，软件
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* 根据许可证分发是按“原样”基础进行的，
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* 不附带任何明示或暗示的担保或条件。
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* 请参阅许可证以获取特定语言的权限和
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* 限制。
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*/
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package net.micode.notes.data;
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@ -26,198 +26,209 @@ import net.micode.notes.data.Notes.DataColumns;
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import net.micode.notes.data.Notes.DataConstants;
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import net.micode.notes.data.Notes.NoteColumns;
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// NotesDatabaseHelper 是一个 SQLiteOpenHelper 类的子类，用于管理笔记应用的数据库
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public class NotesDatabaseHelper extends SQLiteOpenHelper {
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// 定义了数据库名称
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private static final String DB_NAME = "note.db";
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// 定义了数据库版本号
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private static final int DB_VERSION = 4;
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// 定义了一个内部接口TABLE，包含了表名常量
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public interface TABLE {
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public static final String NOTE = "note";
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public static final String DATA = "data";
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public static final String NOTE = "note"; // 笔记表名
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public static final String DATA = "data"; // 数据表名
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}
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// 定义了日志标签字符串
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private static final String TAG = "NotesDatabaseHelper";
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// 定义了单例实例
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private static NotesDatabaseHelper mInstance;
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// 定义了创建笔记表的SQL语句
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private static final String CREATE_NOTE_TABLE_SQL =
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"CREATE TABLE " + TABLE.NOTE + "(" +
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NoteColumns.ID + " INTEGER PRIMARY KEY," +
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NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
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NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
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NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
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NoteColumns.ID + " INTEGER PRIMARY KEY," + // 笔记ID，主键
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NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 父文件夹ID，默认为0
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NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + // 提醒日期，默认为0
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NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + // 背景颜色ID，默认为0
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建日期，默认为当前时间（毫秒）
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NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + // 是否有附件，默认为0
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期，默认为当前时间（毫秒）
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NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + // 笔记数量，默认为0
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NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + // 笔记摘要，默认为空字符串
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NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 笔记类型，默认为0
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NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + // 小部件ID，默认为0
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NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + // 小部件类型，默认为-1
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NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + // 同步ID，默认为0
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NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + // 是否本地修改，默认为0
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NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 原始父文件夹ID，默认为0
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NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + // GTasks ID，默认为空字符串
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + // 版本号，默认为0
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")";
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// 定义了创建 DATA 表的SQL语句
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private static final String CREATE_DATA_TABLE_SQL =
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"CREATE TABLE " + TABLE.DATA + "(" +
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DataColumns.ID + " INTEGER PRIMARY KEY," +
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DataColumns.MIME_TYPE + " TEXT NOT NULL," +
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DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA1 + " INTEGER," +
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DataColumns.DATA2 + " INTEGER," +
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DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
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DataColumns.ID + " INTEGER PRIMARY KEY," + // 数据ID，主键
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DataColumns.MIME_TYPE + " TEXT NOT NULL," + // MIME类型，默认为空字符串
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DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + // 关联的笔记ID，默认为0
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建日期，默认为当前时间（毫秒）
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期，默认为当前时间（毫秒）
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DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + // 数据内容，默认为空字符串
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DataColumns.DATA1 + " INTEGER," + // 自定义数据1
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DataColumns.DATA2 + " INTEGER," + // 自定义数据2
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DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + // 自定义数据3，默认为空字符串
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DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + // 自定义数据4，默认为空字符串
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + // 自定义数据5，默认为空字符串
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")";
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// 定义了创建数据表中note_id索引的SQL语句
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private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
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"CREATE INDEX IF NOT EXISTS note_id_index ON " +
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TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
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TABLE.DATA + "(" + DataColumns.NOTE_ID + "); "; // 为data表中的note_id列创建索引
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/**
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* Increase folder's note count when move note to the folder
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* 当笔记移动到文件夹时，增加文件夹的笔记数量
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*/
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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"CREATE TRIGGER increase_folder_count_on_update "+
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + // 更新父文件夹的笔记数量加1
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + // 父文件夹ID为移动后的文件夹ID
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" END";
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/**
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* Decrease folder's note count when move note from folder
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* 当笔记从文件夹中移除时，减少文件夹的笔记数量
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*/
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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"CREATE TRIGGER decrease_folder_count_on_update " +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + // 更新父文件夹的笔记数量减1
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + // 父文件夹ID为移动前的文件夹ID
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + // 仅当笔记数量大于0时更新
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" END";
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/**
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* Increase folder's note count when insert new note to the folder
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* 当向文件夹中插入新笔记时，增加文件夹的笔记数量
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*/
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
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"CREATE TRIGGER increase_folder_count_on_insert " +
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" AFTER INSERT ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + // 更新父文件夹的笔记数量加1
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + // 父文件夹ID为新笔记的父文件夹ID
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" END";
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/**
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* Decrease folder's note count when delete note from the folder
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* 当从文件夹中删除笔记时，减少文件夹的笔记数量
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*/
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
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"CREATE TRIGGER decrease_folder_count_on_delete " +
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" AFTER DELETE ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0;" +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + // 更新父文件夹的笔记数量减1
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + // 父文件夹ID为删除笔记的父文件夹ID
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" AND " + NoteColumns.NOTES_COUNT + ">0;" + // 仅当笔记数量大于0时更新
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" END";
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/**
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* Update note's content when insert data with type {@link DataConstants#NOTE}
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* 当插入类型为 {@link DataConstants#NOTE} 的数据时，更新笔记的内容
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*/
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
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"CREATE TRIGGER update_note_content_on_insert " +
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" AFTER INSERT ON " + TABLE.DATA +
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" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
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" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + // 当插入的数据类型为笔记时
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" BEGIN" +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + // 更新笔记的摘要为新插入的数据内容
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + // 笔记ID为新插入数据关联的笔记ID
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" END";
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/**
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* Update note's content when data with {@link DataConstants#NOTE} type has changed
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* 当更新类型为 {@link DataConstants#NOTE} 的数据时，更新笔记的内容
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*/
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
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"CREATE TRIGGER update_note_content_on_update " +
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" AFTER UPDATE ON " + TABLE.DATA +
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" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
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" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + // 当更新的数据类型为笔记时
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" BEGIN" +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + // 更新笔记的摘要为更新后的数据内容
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + // 笔记ID为更新数据关联的笔记ID
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" END";
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/**
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* Update note's content when data with {@link DataConstants#NOTE} type has deleted
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* 当删除类型为 {@link DataConstants#NOTE} 的数据时，清空笔记的内容
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*/
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
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"CREATE TRIGGER update_note_content_on_delete " +
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" AFTER delete ON " + TABLE.DATA +
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" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
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" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + // 当删除的数据类型为笔记时
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" BEGIN" +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=''" +
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" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
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" SET " + NoteColumns.SNIPPET + "=''" + // 清空笔记的摘要
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" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" + // 笔记ID为删除数据关联的笔记ID
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|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Delete datas belong to note which has been deleted
|
|
|
|
|
* 当删除笔记时，删除属于该笔记的所有数据
|
|
|
|
|
*/
|
|
|
|
|
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
|
|
|
|
|
"CREATE TRIGGER delete_data_on_delete " +
|
|
|
|
|
" AFTER DELETE ON " + TABLE.NOTE +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
" DELETE FROM " + TABLE.DATA +
|
|
|
|
|
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
|
|
" DELETE FROM " + TABLE.DATA + // 删除data表中与笔记ID关联的所有数据
|
|
|
|
|
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" + // 笔记ID为删除笔记的ID
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Delete notes belong to folder which has been deleted
|
|
|
|
|
* 当删除文件夹时，删除属于该文件夹的所有笔记
|
|
|
|
|
*/
|
|
|
|
|
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
|
|
|
|
|
"CREATE TRIGGER folder_delete_notes_on_delete " +
|
|
|
|
|
" AFTER DELETE ON " + TABLE.NOTE +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
" DELETE FROM " + TABLE.NOTE +
|
|
|
|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
|
|
" DELETE FROM " + TABLE.NOTE + // 删除note表中与文件夹ID关联的所有笔记
|
|
|
|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + // 父文件夹ID为删除文件夹的ID
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Move notes belong to folder which has been moved to trash folder
|
|
|
|
|
* 当文件夹被移动到回收站文件夹时，将文件夹中的所有笔记也移动到回收站文件夹
|
|
|
|
|
*/
|
|
|
|
|
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
|
|
|
|
|
"CREATE TRIGGER folder_move_notes_on_trash " +
|
|
|
|
|
" AFTER UPDATE ON " + TABLE.NOTE +
|
|
|
|
|
" WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
|
|
|
|
|
" WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + // 当笔记被移动到回收站文件夹时
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
|
|
|
|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
|
|
" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + // 将笔记的父文件夹ID设置为回收站文件夹ID
|
|
|
|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + // 笔记的父文件夹ID为移动前的文件夹ID
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
// 构造函数，初始化数据库帮助器
|
|
|
|
|
public NotesDatabaseHelper(Context context) {
|
|
|
|
|
super(context, DB_NAME, null, DB_VERSION);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 创建笔记表的方法
|
|
|
|
|
public void createNoteTable(SQLiteDatabase db) {
|
|
|
|
|
db.execSQL(CREATE_NOTE_TABLE_SQL);
|
|
|
|
|
reCreateNoteTableTriggers(db);
|
|
|
|
|
createSystemFolder(db);
|
|
|
|
|
Log.d(TAG, "note table has been created");
|
|
|
|
|
db.execSQL(CREATE_NOTE_TABLE_SQL); // 执行创建笔记表的SQL语句
|
|
|
|
|
reCreateNoteTableTriggers(db); // 重新创建笔记表的触发器
|
|
|
|
|
createSystemFolder(db); // 创建系统文件夹
|
|
|
|
|
Log.d(TAG, "note table has been created"); // 记录日志，表示笔记表已创建
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 重新创建笔记表触发器的方法
|
|
|
|
|
private void reCreateNoteTableTriggers(SQLiteDatabase db) {
|
|
|
|
|
// 删除旧的触发器
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
|
|
|
|
|
@ -226,6 +237,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
|
|
|
|
|
|
|
|
|
|
// 创建新的触发器
|
|
|
|
|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
|
|
|
|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
|
|
|
|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
|
|
|
|
|
@ -235,128 +247,147 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 创建系统文件夹的方法
|
|
|
|
|
private void createSystemFolder(SQLiteDatabase db) {
|
|
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* call record foler for call notes
|
|
|
|
|
* 创建通话记录文件夹，用于存储通话笔记
|
|
|
|
|
*/
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); // 设置系统文件夹ID
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置文件夹类型为系统类型
|
|
|
|
|
db.insert(TABLE.NOTE, null, values); // 插入通话记录文件夹到笔记表
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* root folder which is default folder
|
|
|
|
|
* 创建根文件夹，默认文件夹
|
|
|
|
|
*/
|
|
|
|
|
values.clear();
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
values.clear(); // 清空之前插入的值
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); // 设置系统文件夹ID
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置文件夹类型为系统类型
|
|
|
|
|
db.insert(TABLE.NOTE, null, values); // 插入根文件夹到笔记表
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* temporary folder which is used for moving note
|
|
|
|
|
* 创建临时文件夹，用于移动笔记
|
|
|
|
|
*/
|
|
|
|
|
values.clear();
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
values.clear(); // 清空之前插入的值
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); // 设置系统文件夹ID
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置文件夹类型为系统类型
|
|
|
|
|
db.insert(TABLE.NOTE, null, values); // 插入临时文件夹到笔记表
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* create trash folder
|
|
|
|
|
* 创建回收站文件夹
|
|
|
|
|
*/
|
|
|
|
|
values.clear();
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
values.clear(); // 清空之前插入的值
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); // 设置系统文件夹ID
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置文件夹类型为系统类型
|
|
|
|
|
db.insert(TABLE.NOTE, null, values); // 插入回收站文件夹到笔记表
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 创建数据表的方法
|
|
|
|
|
public void createDataTable(SQLiteDatabase db) {
|
|
|
|
|
db.execSQL(CREATE_DATA_TABLE_SQL);
|
|
|
|
|
reCreateDataTableTriggers(db);
|
|
|
|
|
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
|
|
|
|
|
Log.d(TAG, "data table has been created");
|
|
|
|
|
db.execSQL(CREATE_DATA_TABLE_SQL); // 执行创建数据表的SQL语句
|
|
|
|
|
reCreateDataTableTriggers(db); // 重新创建数据表的触发器
|
|
|
|
|
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); // 创建note_id索引
|
|
|
|
|
Log.d(TAG, "data table has been created"); // 记录日志，表示数据表已创建
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 重新创建数据表触发器的方法
|
|
|
|
|
private void reCreateDataTableTriggers(SQLiteDatabase db) {
|
|
|
|
|
// 删除旧的触发器
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
|
|
|
|
|
|
|
|
|
|
// 创建新的触发器
|
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
|
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
|
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 获取 NotesDatabaseHelper 单例实例的方法
|
|
|
|
|
static synchronized NotesDatabaseHelper getInstance(Context context) {
|
|
|
|
|
if (mInstance == null) {
|
|
|
|
|
mInstance = new NotesDatabaseHelper(context);
|
|
|
|
|
mInstance = new NotesDatabaseHelper(context); // 初始化单例实例
|
|
|
|
|
}
|
|
|
|
|
return mInstance;
|
|
|
|
|
return mInstance; // 返回单例实例
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 当数据库第一次创建时调用的方法
|
|
|
|
|
@Override
|
|
|
|
|
public void onCreate(SQLiteDatabase db) {
|
|
|
|
|
createNoteTable(db);
|
|
|
|
|
createDataTable(db);
|
|
|
|
|
createNoteTable(db); // 创建笔记表
|
|
|
|
|
createDataTable(db); // 创建数据表
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 当数据库需要升级时调用的方法
|
|
|
|
|
@Override
|
|
|
|
|
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
|
|
|
|
|
boolean reCreateTriggers = false;
|
|
|
|
|
boolean skipV2 = false;
|
|
|
|
|
|
|
|
|
|
// 如果当前版本是1，直接删除旧表并创建新表
|
|
|
|
|
if (oldVersion == 1) {
|
|
|
|
|
upgradeToV2(db);
|
|
|
|
|
skipV2 = true; // this upgrade including the upgrade from v2 to v3
|
|
|
|
|
upgradeToV2(db); // 升级到版本2
|
|
|
|
|
skipV2 = true; // 这次升级包含了从v2到v3的升级
|
|
|
|
|
oldVersion++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果当前版本是2，添加新的列并创建系统文件夹
|
|
|
|
|
if (oldVersion == 2 && !skipV2) {
|
|
|
|
|
upgradeToV3(db);
|
|
|
|
|
reCreateTriggers = true;
|
|
|
|
|
upgradeToV3(db); // 升级到版本3
|
|
|
|
|
reCreateTriggers = true; // 标记需要重新创建触发器
|
|
|
|
|
oldVersion++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果当前版本是3，添加版本号列
|
|
|
|
|
if (oldVersion == 3) {
|
|
|
|
|
upgradeToV4(db);
|
|
|
|
|
upgradeToV4(db); // 升级到版本4
|
|
|
|
|
oldVersion++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果需要重新创建触发器，调用相应的方法
|
|
|
|
|
if (reCreateTriggers) {
|
|
|
|
|
reCreateNoteTableTriggers(db);
|
|
|
|
|
reCreateDataTableTriggers(db);
|
|
|
|
|
reCreateNoteTableTriggers(db); // 重新创建笔记表的触发器
|
|
|
|
|
reCreateDataTableTriggers(db); // 重新创建数据表的触发器
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果升级失败，抛出异常
|
|
|
|
|
if (oldVersion != newVersion) {
|
|
|
|
|
throw new IllegalStateException("Upgrade notes database to version " + newVersion
|
|
|
|
|
+ "fails");
|
|
|
|
|
+ " fails"); // 抛出异常，表示数据库升级失败
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 升级到数据库版本2的方法
|
|
|
|
|
private void upgradeToV2(SQLiteDatabase db) {
|
|
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
|
|
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
|
|
|
|
|
createNoteTable(db);
|
|
|
|
|
createDataTable(db);
|
|
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); // 删除旧的笔记表
|
|
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); // 删除旧的数据表
|
|
|
|
|
createNoteTable(db); // 创建新的笔记表
|
|
|
|
|
createDataTable(db); // 创建新的数据表
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 升级到数据库版本3的方法
|
|
|
|
|
private void upgradeToV3(SQLiteDatabase db) {
|
|
|
|
|
// drop unused triggers
|
|
|
|
|
// 删除不再使用的触发器
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
|
|
|
|
|
// add a column for gtask id
|
|
|
|
|
|
|
|
|
|
// 添加 gtask id 列
|
|
|
|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
|
|
|
|
|
+ " TEXT NOT NULL DEFAULT ''");
|
|
|
|
|
// add a trash system folder
|
|
|
|
|
+ " TEXT NOT NULL DEFAULT ''"); // 为笔记表添加gtask_id列
|
|
|
|
|
|
|
|
|
|
// 添加回收站系统文件夹
|
|
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); // 设置系统文件夹ID
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置文件夹类型为系统类型
|
|
|
|
|
db.insert(TABLE.NOTE, null, values); // 插入回收站文件夹到笔记表
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 升级到数据库版本4的方法
|
|
|
|
|
private void upgradeToV4(SQLiteDatabase db) {
|
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// 添加版本号列
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db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
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+ " INTEGER NOT NULL DEFAULT 0");
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+ " INTEGER NOT NULL DEFAULT 0"); // 为笔记表添加version列
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}
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}
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