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@ -1,6 +1,8 @@
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/*
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/*
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* 该类为Notes数据库的辅助类，负责管理数据库的创建和版本管理。
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* NotesDatabaseHelper类是用于管理Notes数据库的辅助类，负责数据库的创建和版本管理。
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* 继承了SQLiteOpenHelper，定义了数据库的表结构、触发器及其管理逻辑。
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*/
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*/
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package net.micode.notes.data;
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package net.micode.notes.data;
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import android.content.ContentValues;
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import android.content.ContentValues;
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@ -13,71 +15,69 @@ 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.DataConstants;
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import net.micode.notes.data.Notes.NoteColumns;
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import net.micode.notes.data.Notes.NoteColumns;
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public class NotesDatabaseHelper extends SQLiteOpenHelper {
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public class NotesDatabaseHelper extends SQLiteOpenHelper {
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// 数据库名称
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// 数据库名称
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private static final String DB_NAME = "note.db";
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private static final String DB_NAME = "note.db";
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// 数据库版本号
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// 数据库版本号，用于判断数据库结构是否需要升级
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private static final int DB_VERSION = 4;
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private static final int DB_VERSION = 4;
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// 表接口，定义了数据库中的两个表名
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// 表接口，定义了数据库中两个主要表的表名：NOTE和DATA
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public interface TABLE {
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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 NOTE = "note"; // 存储笔记信息
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public static final String DATA = "data"; // 存储笔记内容的数据表
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public static final String DATA = "data";
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}
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}
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// 日志标签
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// 日志标签，用于输出调试信息
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private static final String TAG = "NotesDatabaseHelper";
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private static final String TAG = "NotesDatabaseHelper";
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// 单例模式，确保数据库辅助类的唯一实例
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// 单例模式，确保数据库辅助类的唯一实例
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private static NotesDatabaseHelper mInstance;
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private static NotesDatabaseHelper mInstance;
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// 创建NOTE表的SQL语句
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// SQL语句：创建NOTE表
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private static final String CREATE_NOTE_TABLE_SQL =
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private static final String CREATE_NOTE_TABLE_SQL =
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"CREATE TABLE " + TABLE.NOTE + "(" +
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"CREATE TABLE " + TABLE.NOTE + "(" +
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NoteColumns.ID + " INTEGER PRIMARY KEY," +
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NoteColumns.ID + " INTEGER PRIMARY KEY," + // 笔记唯一ID
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NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 父文件夹ID
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NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + // 提醒日期
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NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + // 背景颜色ID
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建日期
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NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +// 是否有附件
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期
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NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + // 文件夹内笔记数量
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NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
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NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + // 笔记摘要
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NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 笔记类型
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NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + // 小部件ID
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NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
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NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + // 小部件类型
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NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + // 同步ID
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NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +// 本地是否已修改
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NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +// 原始父ID
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NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
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NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + // Google任务ID
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + // 笔记版本号
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")";
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")";
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// 创建DATA表的SQL语句
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// SQL语句：创建DATA表
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private static final String CREATE_DATA_TABLE_SQL =
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private static final String CREATE_DATA_TABLE_SQL =
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"CREATE TABLE " + TABLE.DATA + "(" +
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"CREATE TABLE " + TABLE.DATA + "(" +
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DataColumns.ID + " INTEGER PRIMARY KEY," +
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DataColumns.ID + " INTEGER PRIMARY KEY," + // 数据项唯一ID
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DataColumns.MIME_TYPE + " TEXT NOT NULL," +
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DataColumns.MIME_TYPE + " TEXT NOT NULL," + // 数据项的MIME类型
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DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
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DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + // 关联的NOTE表ID
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建日期
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期
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DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + // 内容
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DataColumns.DATA1 + " INTEGER," +
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DataColumns.DATA1 + " INTEGER," + // 通用数据列1
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DataColumns.DATA2 + " INTEGER," +
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DataColumns.DATA2 + " INTEGER," + // 通用数据列2
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DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + // 通用数据列3
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DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + // 通用数据列4
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + // 通用数据列5
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")";
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")";
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// 创建DATA表的NOTE_ID索引的SQL语句
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// SQL语句：创建DATA表的NOTE_ID字段的索引，提高查询效率
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private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
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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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"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 + ");";
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// 当更新NOTE表中的PARENT_ID字段时，增加目标文件夹的NOTE_COUNT
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// 触发器：在更改NOTE表中PARENT_ID字段时，增加目标文件夹的NOTES_COUNT
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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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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"CREATE TRIGGER increase_folder_count_on_update " +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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@ -87,7 +87,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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" END";
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// 当从文件夹移动NOTE时，减少源文件夹的NOTE_COUNT
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// 触发器：在更改NOTE表中PARENT_ID字段时，减少源文件夹的NOTES_COUNT
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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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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"CREATE TRIGGER decrease_folder_count_on_update " +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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@ -98,7 +98,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
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" END";
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" END";
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// 当插入新NOTE时，增加目标文件夹的NOTE_COUNT
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// 触发器：在NOTE表插入新记录时，增加目标文件夹的NOTES_COUNT
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
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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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"CREATE TRIGGER increase_folder_count_on_insert " +
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" AFTER INSERT ON " + TABLE.NOTE +
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" AFTER INSERT ON " + TABLE.NOTE +
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@ -108,7 +108,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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" END";
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// 当删除NOTE时，减少文件夹的NOTE_COUNT
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// 触发器：在NOTE表删除记录时，减少文件夹的NOTES_COUNT
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
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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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"CREATE TRIGGER decrease_folder_count_on_delete " +
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" AFTER DELETE ON " + TABLE.NOTE +
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" AFTER DELETE ON " + TABLE.NOTE +
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@ -119,7 +119,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" AND " + NoteColumns.NOTES_COUNT + ">0;" +
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" AND " + NoteColumns.NOTES_COUNT + ">0;" +
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" END";
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" END";
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// 当插入DATA时，如果类型为NOTE，则更新关联NOTE的内容
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// 触发器：在DATA表插入新记录时，若MIME类型为NOTE，更新NOTE表的SNIPPET内容
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
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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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"CREATE TRIGGER update_note_content_on_insert " +
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" AFTER INSERT ON " + TABLE.DATA +
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" AFTER INSERT ON " + TABLE.DATA +
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@ -130,7 +130,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" END";
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" END";
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// 当更新DATA时，如果类型为NOTE，则更新关联NOTE的内容
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// 触发器：在DATA表更新记录时，若MIME类型为NOTE，更新NOTE表的SNIPPET内容
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
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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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"CREATE TRIGGER update_note_content_on_update " +
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" AFTER UPDATE ON " + TABLE.DATA +
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" AFTER UPDATE ON " + TABLE.DATA +
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@ -141,7 +141,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" END";
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" END";
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// 当删除DATA时，如果类型为NOTE，则更新关联NOTE的内容为空
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// 触发器：在DATA表删除记录时，若MIME类型为NOTE，清空NOTE表的SNIPPET内容
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
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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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"CREATE TRIGGER update_note_content_on_delete " +
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" AFTER delete ON " + TABLE.DATA +
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" AFTER delete ON " + TABLE.DATA +
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@ -152,7 +152,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
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" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
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" END";
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" END";
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// 当删除NOTE时，删除关联的DATA
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// 触发器：在NOTE表删除记录时，删除关联的所有DATA记录
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private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
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private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
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"CREATE TRIGGER delete_data_on_delete " +
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"CREATE TRIGGER delete_data_on_delete " +
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" AFTER DELETE ON " + TABLE.NOTE +
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" AFTER DELETE ON " + TABLE.NOTE +
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@ -161,7 +161,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
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" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
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" END";
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" END";
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// 当删除NOTE时，删除属于该NOTE的子NOTE
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// 触发器：在NOTE表删除文件夹记录时，删除该文件夹内的所有子NOTE记录
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private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
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private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
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"CREATE TRIGGER folder_delete_notes_on_delete " +
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"CREATE TRIGGER folder_delete_notes_on_delete " +
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" AFTER DELETE ON " + TABLE.NOTE +
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" AFTER DELETE ON " + TABLE.NOTE +
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@ -170,7 +170,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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" END";
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" END";
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// 当NOTE移动到回收站文件夹时，将所有子NOTE也移动到回收站
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// 触发器：在NOTE表更新记录时，若目标为回收站，将所有子NOTE也移入回收站
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private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
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private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
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"CREATE TRIGGER folder_move_notes_on_trash " +
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"CREATE TRIGGER folder_move_notes_on_trash " +
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" AFTER UPDATE ON " + TABLE.NOTE +
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" AFTER UPDATE ON " + TABLE.NOTE +
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@ -181,6 +181,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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" END";
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" END";
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/**
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/**
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* 构造函数，私有化以防止外部实例化
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* 构造函数，私有化以防止外部实例化
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*
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*
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@ -190,199 +191,264 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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super(context, DB_NAME, null, DB_VERSION);
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super(context, DB_NAME, null, DB_VERSION);
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}
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}
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/**
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/*
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* 创建NOTE表，并重新创建NOTE表的触发器，然后创建系统文件夹
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* 创建NOTE表，并重新创建NOTE表的触发器，然后创建系统文件夹
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*
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*
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* @param db SQLiteDatabase对象，用于执行SQL创建语句
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* @param db SQLiteDatabase对象，用于执行SQL创建语句
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*/
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*/
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/**
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* 创建NOTE表，并为该表重新创建触发器和系统文件夹。
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*
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* @param db SQLiteDatabase对象，用于执行SQL创建语句
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*/
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public void createNoteTable(SQLiteDatabase db) {
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public void createNoteTable(SQLiteDatabase db) {
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// 执行SQL语句创建NOTE表，定义表结构及默认值
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db.execSQL(CREATE_NOTE_TABLE_SQL);
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db.execSQL(CREATE_NOTE_TABLE_SQL);
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// 重新创建NOTE表的相关触发器，以确保数据完整性和联动效果
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reCreateNoteTableTriggers(db);
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reCreateNoteTableTriggers(db);
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// 创建系统文件夹，例如根文件夹、临时文件夹和回收站，以便分类管理笔记
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createSystemFolder(db);
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createSystemFolder(db);
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// 输出调试信息，确认NOTE表已创建成功
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|
Log.d(TAG, "note table has been created");
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|
Log.d(TAG, "note table has been created");
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}
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}
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/**
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/**
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* 重新创建笔记表的触发器
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* 重新创建笔记表的触发器
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*
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*
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* @param db SQLiteDatabase 类型，数据库对象
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* @param db SQLiteDatabase 类型，数据库对象
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*/
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*/
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|
/*
|
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* 删除旧的触发器并重新创建NOTE表的触发器，以确保表的完整性和数据一致性。
|
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* 每个触发器用于在特定操作（如插入、更新或删除）时自动维护NOTE表和相关数据表的关联逻辑。
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*
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* @param db SQLiteDatabase对象，用于执行触发器的SQL语句
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*/
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private void reCreateNoteTableTriggers(SQLiteDatabase db) {
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private void reCreateNoteTableTriggers(SQLiteDatabase db) {
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// 删除旧的触发器
|
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|
// 删除旧的触发器，以确保不会重复创建触发器或造成冲突
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db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
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db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update"); // 删除当更新文件夹时增加计数的触发器
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db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
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db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update"); // 删除当更新文件夹时减少计数的触发器
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db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
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|
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete"); // 删除当删除笔记时减少计数的触发器
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db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete");
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|
db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete"); // 删除当删除笔记时删除相关数据的触发器
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db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert");
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|
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert"); // 删除当插入新笔记时增加计数的触发器
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|
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
|
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|
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete"); // 删除当删除文件夹时删除其子笔记的触发器
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|
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
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|
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash"); // 删除当文件夹被移至回收站时移动其子笔记的触发器
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|
// 创建新的触发器
|
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|
|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
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|
|
// 创建新的触发器，以确保数据完整性和联动效果
|
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|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
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|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER); // 创建更新时增加文件夹计数的触发器
|
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|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
|
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|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER); // 创建更新时减少文件夹计数的触发器
|
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|
db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);
|
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|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER); // 创建删除时减少文件夹计数的触发器
|
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|
|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
|
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|
|
db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER); // 创建删除笔记时删除关联数据的触发器
|
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|
|
db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
|
|
|
|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER); // 创建插入新笔记时增加文件夹计数的触发器
|
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|
|
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
|
|
|
|
db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER); // 创建删除文件夹时删除其子笔记的触发器
|
|
|
|
|
|
|
|
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER); // 创建移动文件夹至回收站时移动子笔记的触发器
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
/**
|
|
|
|
* 创建系统文件夹
|
|
|
|
* 创建系统文件夹，用于组织和分类笔记。这些文件夹包括：
|
|
|
|
|
|
|
|
* - 通话记录文件夹
|
|
|
|
|
|
|
|
* - 根文件夹（默认文件夹）
|
|
|
|
|
|
|
|
* - 临时文件夹（用于移动笔记）
|
|
|
|
|
|
|
|
* - 回收站文件夹
|
|
|
|
|
|
|
|
* 这些文件夹用于支持系统中不同类型的笔记分类管理。
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* @param db SQLiteDatabase 类型，数据库对象
|
|
|
|
* @param db SQLiteDatabase对象，用于执行插入操作
|
|
|
|
*/
|
|
|
|
*/
|
|
|
|
private void createSystemFolder(SQLiteDatabase db) {
|
|
|
|
private void createSystemFolder(SQLiteDatabase db) {
|
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
ContentValues values = new ContentValues(); // 创建ContentValues对象用于存储列值
|
|
|
|
// 创建通话记录文件夹
|
|
|
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
|
|
|
|
// 创建通话记录文件夹，保存与通话记录相关的笔记
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); // 设置通话记录文件夹的ID
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置文件夹类型为系统文件夹
|
|
|
|
// 创建根文件夹（默认文件夹）
|
|
|
|
db.insert(TABLE.NOTE, null, values); // 插入通话记录文件夹到NOTE表
|
|
|
|
values.clear();
|
|
|
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
|
|
|
|
// 创建根文件夹（默认文件夹），用于存放笔记
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
values.clear(); // 清空ContentValues以重用
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); // 设置根文件夹的ID
|
|
|
|
// 创建临时文件夹，用于移动笔记
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置文件夹类型为系统文件夹
|
|
|
|
values.clear();
|
|
|
|
db.insert(TABLE.NOTE, null, values); // 插入根文件夹到NOTE表
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
|
|
|
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
// 创建临时文件夹，用于存放未归类的笔记或移动中的笔记
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
values.clear(); // 清空ContentValues以重用
|
|
|
|
// 创建回收站文件夹
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); // 设置临时文件夹的ID
|
|
|
|
values.clear();
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置文件夹类型为系统文件夹
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
|
|
|
|
db.insert(TABLE.NOTE, null, values); // 插入临时文件夹到NOTE表
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
// 创建回收站文件夹，用于存放已删除的笔记
|
|
|
|
|
|
|
|
values.clear(); // 清空ContentValues以重用
|
|
|
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); // 设置回收站文件夹的ID
|
|
|
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置文件夹类型为系统文件夹
|
|
|
|
|
|
|
|
db.insert(TABLE.NOTE, null, values); // 插入回收站文件夹到NOTE表
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
/**
|
|
|
|
* 创建数据表
|
|
|
|
* 创建DATA表，并为该表重新创建触发器和索引。
|
|
|
|
|
|
|
|
* DATA表用于存储笔记的具体内容和关联信息。
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* @param db SQLiteDatabase 类型，数据库对象
|
|
|
|
* @param db SQLiteDatabase对象，用于执行SQL语句
|
|
|
|
*/
|
|
|
|
*/
|
|
|
|
public void createDataTable(SQLiteDatabase db) {
|
|
|
|
public void createDataTable(SQLiteDatabase db) {
|
|
|
|
|
|
|
|
// 执行SQL语句创建DATA表，定义表的结构和字段
|
|
|
|
db.execSQL(CREATE_DATA_TABLE_SQL);
|
|
|
|
db.execSQL(CREATE_DATA_TABLE_SQL);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 重新创建DATA表的触发器，以确保表的数据一致性和触发器的最新定义
|
|
|
|
reCreateDataTableTriggers(db);
|
|
|
|
reCreateDataTableTriggers(db);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 创建NOTE_ID索引，提高与NOTE表的关联查询效率
|
|
|
|
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
|
|
|
|
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 输出调试信息，确认DATA表已创建成功
|
|
|
|
Log.d(TAG, "data table has been created");
|
|
|
|
Log.d(TAG, "data table has been created");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
/**
|
|
|
|
* 重新创建数据表的触发器
|
|
|
|
* 删除旧的触发器并重新创建DATA表的触发器，以确保表的完整性和数据的一致性。
|
|
|
|
|
|
|
|
* 这些触发器用于在数据插入、更新或删除时，自动更新与DATA表关联的NOTE表内容。
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* @param db SQLiteDatabase 类型，数据库对象
|
|
|
|
* @param db SQLiteDatabase对象，用于执行SQL语句
|
|
|
|
*/
|
|
|
|
*/
|
|
|
|
private void reCreateDataTableTriggers(SQLiteDatabase db) {
|
|
|
|
private void reCreateDataTableTriggers(SQLiteDatabase db) {
|
|
|
|
// 删除旧的触发器
|
|
|
|
// 删除旧的触发器，确保重新创建时不会出现重复定义的问题
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert"); // 删除插入操作触发器
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update"); // 删除更新操作触发器
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete"); // 删除删除操作触发器
|
|
|
|
// 创建新的触发器
|
|
|
|
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
|
|
|
|
// 创建新的触发器，用于管理DATA表和NOTE表之间的关联数据同步
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER); // 当DATA表插入新记录时更新NOTE表内容
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER); // 当DATA表更新记录时更新NOTE表内容
|
|
|
|
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER); // 当DATA表删除记录时清空NOTE表内容
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
/**
|
|
|
|
* 获取 NotesDatabaseHelper 的单例对象
|
|
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|
* 获取 NotesDatabaseHelper 的单例对象。单例模式确保整个应用中只有一个数据库连接实例，
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* 避免多次创建实例造成的资源浪费和数据不一致问题。
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*
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*
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* @param context Context 类型，应用上下文
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* @param context Context类型，应用上下文，用于初始化数据库
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* @return NotesDatabaseHelper 类型，单例对象
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* @return NotesDatabaseHelper类型的单例对象
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*/
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*/
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static synchronized NotesDatabaseHelper getInstance(Context context) {
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static synchronized NotesDatabaseHelper getInstance(Context context) {
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// 检查是否已有实例
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if (mInstance == null) {
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if (mInstance == null) {
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// 如果实例为空，则创建新的 NotesDatabaseHelper 实例
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mInstance = new NotesDatabaseHelper(context);
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mInstance = new NotesDatabaseHelper(context);
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}
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}
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// 返回唯一实例
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return mInstance;
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return mInstance;
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}
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}
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/**
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/**
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* 创建数据库表
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* 创建数据库表的方法。当数据库首次创建时自动调用，用于初始化数据库结构。
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* 此方法创建NOTE表和DATA表，并为它们配置触发器和系统文件夹。
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*
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*
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* @param db SQLiteDatabase 类型，数据库对象
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* @param db SQLiteDatabase对象，用于执行表创建的SQL语句
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*/
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*/
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@Override
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@Override
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public void onCreate(SQLiteDatabase db) {
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public void onCreate(SQLiteDatabase db) {
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// 调用createNoteTable方法，创建NOTE表，并配置相关触发器和系统文件夹
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createNoteTable(db);
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createNoteTable(db);
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// 调用createDataTable方法，创建DATA表，并配置相关触发器和索引
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createDataTable(db);
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createDataTable(db);
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}
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}
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/**
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/**
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* 升级数据库
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* 升级数据库的方法。当检测到数据库版本号发生变化时，系统自动调用此方法，根据旧版本号逐步升级数据库结构。
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* 此方法根据数据库的旧版本逐步调用不同版本的升级方法，并在必要时重新创建触发器。
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*
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*
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* @param db SQLiteDatabase 类型，数据库对象
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* @param db SQLiteDatabase对象，用于执行SQL语句
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* @param oldVersion int 类型，旧版本号
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* @param oldVersion int类型，数据库的旧版本号
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* @param newVersion int 类型，新版本号
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* @param newVersion int类型，数据库的新版本号
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*/
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*/
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@Override
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@Override
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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boolean reCreateTriggers = false;
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boolean reCreateTriggers = false; // 标记是否需要重新创建触发器
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boolean skipV2 = false;
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boolean skipV2 = false; // 标记是否需要跳过版本2的升级
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// 根据旧版本号逐步升级
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// 检查并按顺序执行版本升级
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if (oldVersion == 1) {
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if (oldVersion == 1) {
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upgradeToV2(db);
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upgradeToV2(db); // 从版本1升级到版本2
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skipV2 = true; // 这次升级包括从 v2 到 v3 的升级
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skipV2 = true; // 跳过后续升级到版本2的操作
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oldVersion++;
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oldVersion++;
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}
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}
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if (oldVersion == 2 && !skipV2) {
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if (oldVersion == 2 && !skipV2) {
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upgradeToV3(db);
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upgradeToV3(db); // 从版本2升级到版本3
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reCreateTriggers = true;
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reCreateTriggers = true; // 设置标记为true，表示需要重新创建触发器
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oldVersion++;
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oldVersion++;
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}
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}
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if (oldVersion == 3) {
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if (oldVersion == 3) {
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upgradeToV4(db);
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upgradeToV4(db); // 从版本3升级到版本4
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oldVersion++;
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oldVersion++;
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}
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}
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// 如果升级过程中需要重新创建触发器，则调用方法重新创建NOTE表和DATA表的触发器
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if (reCreateTriggers) {
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if (reCreateTriggers) {
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reCreateNoteTableTriggers(db);
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reCreateNoteTableTriggers(db); // 重新创建NOTE表的触发器
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reCreateDataTableTriggers(db);
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reCreateDataTableTriggers(db); // 重新创建DATA表的触发器
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}
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}
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// 检查是否所有升级已成功完成，如果未完成则抛出异常
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if (oldVersion != newVersion) {
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|
|
if (oldVersion != newVersion) {
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|
throw new IllegalStateException("Upgrade notes database to version " + newVersion
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|
|
throw new IllegalStateException("Upgrade notes database to version " + newVersion + " fails");
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|
|
+ "fails");
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}
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}
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}
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}
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/**
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/**
|
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|
* 从版本1升级到版本2
|
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|
* 从版本1升级到版本2的方法。此升级步骤删除旧表并重新创建NOTE表和DATA表，
|
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* 以确保结构更新并清除旧数据。
|
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|
|
*
|
|
|
|
*
|
|
|
|
* @param db SQLiteDatabase 类型，数据库对象
|
|
|
|
* @param db SQLiteDatabase对象，用于执行SQL操作
|
|
|
|
*/
|
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|
|
*/
|
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|
|
private void upgradeToV2(SQLiteDatabase db) {
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|
|
private void upgradeToV2(SQLiteDatabase db) {
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|
|
// 删除旧表，创建新表
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|
|
// 删除旧的NOTE表和DATA表，确保版本2的结构重新定义
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|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
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db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); // 删除NOTE表
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db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
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|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); // 删除DATA表
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|
|
|
|
|
|
// 重新创建NOTE表和DATA表，应用最新的结构和默认数据
|
|
|
|
createNoteTable(db);
|
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|
|
createNoteTable(db);
|
|
|
|
createDataTable(db);
|
|
|
|
createDataTable(db);
|
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|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
/**
|
|
|
|
* 从版本2升级到版本3
|
|
|
|
* 从版本2升级到版本3的方法。此升级步骤删除未使用的触发器，添加新字段，以及创建回收站系统文件夹。
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* @param db SQLiteDatabase 类型，数据库对象
|
|
|
|
* @param db SQLiteDatabase对象，用于执行SQL操作
|
|
|
|
*/
|
|
|
|
*/
|
|
|
|
private void upgradeToV3(SQLiteDatabase db) {
|
|
|
|
private void upgradeToV3(SQLiteDatabase db) {
|
|
|
|
// 删除未使用的触发器
|
|
|
|
// 删除未使用的触发器，确保数据库结构的简洁和更新
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
|
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|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert"); // 删除插入触发器
|
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|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
|
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|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete"); // 删除删除触发器
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update"); // 删除更新触发器
|
|
|
|
// 添加一个用于 gtask id 的列
|
|
|
|
|
|
|
|
|
|
|
|
// 添加新的字段，用于存储Google任务ID，方便同步外部任务
|
|
|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
|
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|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
|
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|
|
+ " TEXT NOT NULL DEFAULT ''");
|
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|
|
+ " TEXT NOT NULL DEFAULT ''");
|
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|
|
// 添加一个回收站系统文件夹
|
|
|
|
|
|
|
|
|
|
|
|
// 添加一个回收站系统文件夹，专门用于存储已删除的笔记
|
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); // 设置回收站文件夹的ID
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); // 设置类型为系统文件夹
|
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|
|
db.insert(TABLE.NOTE, null, values);
|
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|
|
db.insert(TABLE.NOTE, null, values); // 插入回收站文件夹到NOTE表
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
/**
|
|
|
|
* 从版本3升级到版本4
|
|
|
|
* 从版本3升级到版本4的方法。此升级步骤为NOTE表添加版本号列，用于跟踪笔记的版本。
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* @param db SQLiteDatabase 类型，数据库对象
|
|
|
|
* @param db SQLiteDatabase对象，用于执行SQL操作
|
|
|
|
*/
|
|
|
|
*/
|
|
|
|
private void upgradeToV4(SQLiteDatabase db) {
|
|
|
|
private void upgradeToV4(SQLiteDatabase db) {
|
|
|
|
// 添加版本号列
|
|
|
|
// 添加新的版本号字段，用于记录笔记的版本以支持版本控制或同步机制
|
|
|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
|
|
|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
|
|
|
|
+ " INTEGER NOT NULL DEFAULT 0");
|
|
|
|
+ " INTEGER NOT NULL DEFAULT 0");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
