|
|
/*
|
|
|
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
|
|
|
*
|
|
|
* 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 net.micode.notes.data;
|
|
|
|
|
|
import android.content.ContentValues;
|
|
|
import android.content.Context;
|
|
|
import android.database.sqlite.SQLiteDatabase;
|
|
|
import android.database.sqlite.SQLiteOpenHelper;
|
|
|
import android.util.Log;
|
|
|
|
|
|
import net.micode.notes.data.Notes.DataColumns;
|
|
|
import net.micode.notes.data.Notes.DataConstants;
|
|
|
import net.micode.notes.data.Notes.NoteColumns;
|
|
|
|
|
|
|
|
|
/**
|
|
|
* 便签应用数据库辅助类，继承自SQLiteOpenHelper
|
|
|
* 负责创建和管理数据库表结构、定义触发器、处理版本升级
|
|
|
* 采用单例模式确保全局唯一数据库实例
|
|
|
*/
|
|
|
public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
// 数据库文件名
|
|
|
private static final String DB_NAME = "note.db";
|
|
|
// 数据库版本号（当前为4）
|
|
|
private static final int DB_VERSION = 4;
|
|
|
|
|
|
/**
|
|
|
* 数据库表名接口，定义note表和data表的常量名
|
|
|
*/
|
|
|
public interface TABLE {
|
|
|
public static final String NOTE = "note"; // 便签/文件夹主表
|
|
|
public static final String DATA = "data"; // 便签详细数据/附件表
|
|
|
}
|
|
|
|
|
|
private static final String TAG = "NotesDatabaseHelper";
|
|
|
// 单例实例引用
|
|
|
private static NotesDatabaseHelper mInstance;
|
|
|
|
|
|
/**
|
|
|
* 创建note表的SQL语句（存储便签和文件夹基本信息）
|
|
|
* 字段说明：
|
|
|
* - ID: 主键
|
|
|
* - PARENT_ID: 父文件夹ID
|
|
|
* - ALERTED_DATE: 提醒日期（时间戳）
|
|
|
* - BG_COLOR_ID: 背景色ID
|
|
|
* - CREATED_DATE: 创建日期（默认当前时间戳）
|
|
|
* - HAS_ATTACHMENT: 是否有附件（1=有）
|
|
|
* - MODIFIED_DATE: 最后修改日期（默认当前时间戳）
|
|
|
* - NOTES_COUNT: 文件夹包含的便签数
|
|
|
* - SNIPPET: 便签内容或文件夹名称
|
|
|
* - TYPE: 类型（便签/文件夹/系统）
|
|
|
* - WIDGET_ID: 关联的桌面小部件ID
|
|
|
* - WIDGET_TYPE: 小部件类型
|
|
|
* - SYNC_ID: 同步ID（用于云同步）
|
|
|
* - LOCAL_MODIFIED: 本地修改标识（1=已修改）
|
|
|
* - ORIGIN_PARENT_ID: 原始父文件夹ID（移动时使用）
|
|
|
* - GTASK_ID: Google任务ID
|
|
|
* - VERSION: 数据版本号（用于冲突检测）
|
|
|
*/
|
|
|
private static final String CREATE_NOTE_TABLE_SQL =
|
|
|
"CREATE TABLE " + TABLE.NOTE + "(" +
|
|
|
NoteColumns.ID + " INTEGER PRIMARY KEY," +
|
|
|
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
|
|
|
NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
|
|
|
NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
|
|
|
NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
|
|
|
NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
|
|
|
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
|
|
|
")";
|
|
|
|
|
|
/**
|
|
|
* 创建data表的SQL语句（存储便签附件或扩展数据）
|
|
|
* 字段说明：
|
|
|
* - ID: 主键
|
|
|
* - MIME_TYPE: 数据类型（如图片/音频）
|
|
|
* - NOTE_ID: 关联的便签ID（外键）
|
|
|
* - CREATED_DATE: 创建日期（默认当前时间戳）
|
|
|
* - MODIFIED_DATE: 最后修改日期（默认当前时间戳）
|
|
|
* - CONTENT: 数据内容（文本类型）
|
|
|
* - DATA1-DATA5: 通用数据列（含义由MIME类型决定）
|
|
|
*/
|
|
|
private static final String CREATE_DATA_TABLE_SQL =
|
|
|
"CREATE TABLE " + TABLE.DATA + "(" +
|
|
|
DataColumns.ID + " INTEGER PRIMARY KEY," +
|
|
|
DataColumns.MIME_TYPE + " TEXT NOT NULL," +
|
|
|
DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
|
|
|
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
|
|
|
DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
|
|
|
DataColumns.DATA1 + " INTEGER," +
|
|
|
DataColumns.DATA2 + " INTEGER," +
|
|
|
DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
|
|
|
DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
|
|
|
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
|
|
|
")";
|
|
|
|
|
|
// 创建data表note_id索引的SQL（加速按便签ID查询）
|
|
|
private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
|
|
|
"CREATE INDEX IF NOT EXISTS note_id_index ON " +
|
|
|
TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当便签移动到新文件夹时，增加目标文件夹的便签计数
|
|
|
* 触发时机：note表的parent_id更新后
|
|
|
*/
|
|
|
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
|
|
|
"CREATE TRIGGER increase_folder_count_on_update "+
|
|
|
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
|
|
|
" BEGIN " +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
|
|
|
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当便签移出文件夹时，减少原文件夹的便签计数
|
|
|
* 触发时机：note表的parent_id更新后
|
|
|
*/
|
|
|
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
|
|
|
"CREATE TRIGGER decrease_folder_count_on_update " +
|
|
|
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
|
|
|
" BEGIN " +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
|
|
|
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
|
|
|
" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当新便签插入到文件夹时，增加目标文件夹的便签计数
|
|
|
* 触发时机：note表插入新记录后
|
|
|
*/
|
|
|
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
|
|
|
"CREATE TRIGGER increase_folder_count_on_insert " +
|
|
|
" AFTER INSERT ON " + TABLE.NOTE +
|
|
|
" BEGIN " +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
|
|
|
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当便签从文件夹删除时，减少原文件夹的便签计数
|
|
|
* 触发时机：note表删除记录后
|
|
|
*/
|
|
|
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
|
|
|
"CREATE TRIGGER decrease_folder_count_on_delete " +
|
|
|
" AFTER DELETE ON " + TABLE.NOTE +
|
|
|
" BEGIN " +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
|
|
|
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
|
|
|
" AND " + NoteColumns.NOTES_COUNT + ">0;" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当插入文本便签数据时，更新note表的内容
|
|
|
* 触发时机：data表插入MIME_TYPE为文本便签的记录后
|
|
|
*/
|
|
|
private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
|
|
|
"CREATE TRIGGER update_note_content_on_insert " +
|
|
|
" AFTER INSERT ON " + TABLE.DATA +
|
|
|
" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
|
|
|
" BEGIN" +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
|
|
|
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当文本便签数据更新时，更新note表的内容
|
|
|
* 触发时机：data表更新MIME_TYPE为文本便签的记录后
|
|
|
*/
|
|
|
private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
|
|
|
"CREATE TRIGGER update_note_content_on_update " +
|
|
|
" AFTER UPDATE ON " + TABLE.DATA +
|
|
|
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
|
|
|
" BEGIN" +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
|
|
|
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当删除文本便签数据时，清空note表的内容
|
|
|
* 触发时机：data表删除MIME_TYPE为文本便签的记录后
|
|
|
*/
|
|
|
private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
|
|
|
"CREATE TRIGGER update_note_content_on_delete " +
|
|
|
" AFTER delete ON " + TABLE.DATA +
|
|
|
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
|
|
|
" BEGIN" +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.SNIPPET + "=''" +
|
|
|
" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当便签被删除时，级联删除其关联的附件数据
|
|
|
* 触发时机：note表删除记录后
|
|
|
*/
|
|
|
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 + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当文件夹被删除时，级联删除其包含的所有便签
|
|
|
* 触发时机：note表删除记录后（仅针对文件夹类型）
|
|
|
*/
|
|
|
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 + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 触发器：当文件夹被移动到回收站时，将其包含的便签同步移动到回收站
|
|
|
* 触发时机：note表更新parent_id为回收站ID后
|
|
|
*/
|
|
|
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 +
|
|
|
" BEGIN" +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
|
|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 构造方法，调用父类SQLiteOpenHelper初始化
|
|
|
* @param context 应用上下文
|
|
|
*/
|
|
|
public NotesDatabaseHelper(Context context) {
|
|
|
super(context, DB_NAME, null, DB_VERSION);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 创建note表及相关触发器，并初始化系统文件夹
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
*/
|
|
|
public void createNoteTable(SQLiteDatabase db) {
|
|
|
db.execSQL(CREATE_NOTE_TABLE_SQL);
|
|
|
reCreateNoteTableTriggers(db);
|
|
|
createSystemFolder(db);
|
|
|
Log.d(TAG, "note table has been created");
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 重建note表相关触发器（先删除旧触发器再创建新触发器）
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
*/
|
|
|
private void reCreateNoteTableTriggers(SQLiteDatabase db) {
|
|
|
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");
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete");
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert");
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
|
|
|
|
|
|
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);
|
|
|
db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);
|
|
|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
|
|
|
db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
|
|
|
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 创建系统默认文件夹（通话记录、根目录、临时文件夹、回收站）
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
*/
|
|
|
private void createSystemFolder(SQLiteDatabase db) {
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
|
|
/**
|
|
|
* 通话记录文件夹（存储通话便签）
|
|
|
*/
|
|
|
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
|
/**
|
|
|
* 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);
|
|
|
|
|
|
/**
|
|
|
* 临时文件夹（用于移动便签时的过渡存储）
|
|
|
*/
|
|
|
values.clear();
|
|
|
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
|
/**
|
|
|
* 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);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 创建data表及相关触发器，并创建note_id索引
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
*/
|
|
|
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");
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 重建data表相关触发器（先删除旧触发器再创建新触发器）
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
*/
|
|
|
private void reCreateDataTableTriggers(SQLiteDatabase db) {
|
|
|
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");
|
|
|
|
|
|
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);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 获取数据库辅助类的单例实例（线程安全）
|
|
|
* @param context 应用上下文
|
|
|
* @return NotesDatabaseHelper实例
|
|
|
*/
|
|
|
static synchronized NotesDatabaseHelper getInstance(Context context) {
|
|
|
if (mInstance == null) {
|
|
|
mInstance = new NotesDatabaseHelper(context);
|
|
|
}
|
|
|
return mInstance;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 数据库创建回调（首次创建数据库时调用）
|
|
|
* 调用createNoteTable和createDataTable创建表结构
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
*/
|
|
|
@Override
|
|
|
public void onCreate(SQLiteDatabase db) {
|
|
|
createNoteTable(db);
|
|
|
createDataTable(db);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 数据库版本升级回调
|
|
|
* 根据旧版本号执行对应的升级逻辑
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
* @param oldVersion 旧版本号
|
|
|
* @param newVersion 新版本号
|
|
|
*/
|
|
|
@Override
|
|
|
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
|
|
|
boolean reCreateTriggers = false;
|
|
|
boolean skipV2 = false;
|
|
|
|
|
|
// 版本1升级到版本2（全量重建表结构）
|
|
|
if (oldVersion == 1) {
|
|
|
upgradeToV2(db);
|
|
|
skipV2 = true; // 该升级包含了版本2到版本3的逻辑
|
|
|
oldVersion++;
|
|
|
}
|
|
|
|
|
|
// 版本2升级到版本3（添加GTASK_ID列和回收站文件夹）
|
|
|
if (oldVersion == 2 && !skipV2) {
|
|
|
upgradeToV3(db);
|
|
|
reCreateTriggers = true;
|
|
|
oldVersion++;
|
|
|
}
|
|
|
|
|
|
// 版本3升级到版本4（添加VERSION列）
|
|
|
if (oldVersion == 3) {
|
|
|
upgradeToV4(db);
|
|
|
oldVersion++;
|
|
|
}
|
|
|
|
|
|
// 若触发器在升级过程中被修改，重新创建触发器
|
|
|
if (reCreateTriggers) {
|
|
|
reCreateNoteTableTriggers(db);
|
|
|
reCreateDataTableTriggers(db);
|
|
|
}
|
|
|
|
|
|
// 若版本升级未完成，抛出异常（防止数据不一致）
|
|
|
if (oldVersion != newVersion) {
|
|
|
throw new IllegalStateException("Upgrade notes database to version " + newVersion
|
|
|
+ "fails");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 版本1升级到版本2的具体实现（全量重建表结构）
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
*/
|
|
|
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);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 版本2升级到版本3的具体实现（添加GTASK_ID列和回收站文件夹）
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
*/
|
|
|
private void upgradeToV3(SQLiteDatabase db) {
|
|
|
// 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");
|
|
|
// 添加Google任务ID列
|
|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
|
|
|
+ " TEXT NOT NULL DEFAULT ''");
|
|
|
// 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);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 版本3升级到版本4的具体实现（添加VERSION列）
|
|
|
* @param db 可写的SQLiteDatabase实例
|
|
|
*/
|
|
|
private void upgradeToV4(SQLiteDatabase db) {
|
|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
|
|
|
+ " INTEGER NOT NULL DEFAULT 0");
|
|
|
}
|
|
|
} |
