diff --git a/src/Notes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java b/src/Notes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java index ffe5d57..3f3c8ef 100644 --- a/src/Notes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java +++ b/src/Notes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java @@ -26,64 +26,90 @@ import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.DataConstants; import net.micode.notes.data.Notes.NoteColumns; - +/** + * 数据库帮助类，负责管理小米便签的本地数据库（note.db），包括： + * - 数据库表的创建与版本升级 + * - 系统文件夹的初始化 + * - 触发器的创建与管理（用于自动维护文件夹便签计数、同步便签内容等） + */ public class NotesDatabaseHelper extends SQLiteOpenHelper { + // 数据库名称 private static final String DB_NAME = "note.db"; - + // 数据库版本（当前版本为4，升级时需处理旧版本迁移逻辑） private static final int DB_VERSION = 4; + /** + * 数据库表名接口 + */ public interface TABLE { - public static final String NOTE = "note"; - - public static final String DATA = "data"; + public static final String NOTE = "note"; // 便签/文件夹表 + public static final String DATA = "data"; // 便签内容表（存储附件、通话记录等扩展数据） } private static final String TAG = "NotesDatabaseHelper"; - + // 单例实例（确保全局唯一数据库连接） private static NotesDatabaseHelper mInstance; + // --------------------------- 表结构创建SQL --------------------------- + /** + * 便签/文件夹表创建语句 + * 包含字段： + * - 唯一ID、父文件夹ID、提醒时间、背景色ID、创建时间、是否有附件、修改时间、子便签数量、摘要内容、类型、小部件ID、同步ID等 + * 系统默认值说明： + * - 创建时间和修改时间使用当前时间戳（秒转毫秒） + * - 文件夹类型通过{@link Notes#TYPE_FOLDER}标识 + */ 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" + + NoteColumns.ID + " INTEGER PRIMARY KEY," + // 主键ID + NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 父文件夹ID（默认根文件夹） + NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + // 提醒时间（时间戳） + NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + // 背景色ID + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建时间（自动填充） + NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + // 是否有附件（0=无，1=有） + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改时间（自动填充） + NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + // 子便签数量 + NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + // 摘要内容（文件夹名称/便签正文） + NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 类型（0=便签，1=文件夹，2=系统文件夹） + NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + // 小部件ID + NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + // 小部件类型（-1=无效，0=2x，1=4x） + NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + // 同步ID（用于云同步版本控制） + NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + // 本地修改标识（1=已修改） + NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 移动前原始父ID（用于临时文件夹逻辑） + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + // Google任务ID（同步到Google Tasks） + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + // 版本号（用于数据冲突检测） ")"; + /** + * 便签内容表创建语句 + * 用于存储便签的扩展数据（如文本内容、通话记录、附件信息等），通过MIME类型区分数据类型 + * - MIME_TYPE为{@link DataConstants#NOTE}时表示文本便签内容 + * - 其他类型可扩展支持图片、语音等附件 + */ 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 ''" + + DataColumns.ID + " INTEGER PRIMARY KEY," + // 主键ID + DataColumns.MIME_TYPE + " TEXT NOT NULL," + // MIME类型（标识数据类型） + DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + // 所属便签ID（关联note表） + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建时间 + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改时间 + DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + // 内容（文本或附件路径） + DataColumns.DATA1 + " INTEGER," + // 通用整数型字段1（如待办清单模式标识） + DataColumns.DATA2 + " INTEGER," + // 通用整数型字段2 + DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + // 通用文本字段1（如电话号码） + DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + // 通用文本字段2 + DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + // 通用文本字段3 ")"; + // --------------------------- 触发器定义 --------------------------- + /** + * 索引：加速根据note_id查询data表数据 + */ private static final String CREATE_DATA_NOTE_ID_INDEX_SQL = - "CREATE INDEX IF NOT EXISTS note_id_index ON " + - TABLE.DATA + "(" + DataColumns.NOTE_ID + ");"; + "CREATE INDEX IF NOT EXISTS note_id_index ON " + TABLE.DATA + "(" + DataColumns.NOTE_ID + ");"; /** - * Increase folder's note count when move note to the folder + * 触发器：当便签移动到新文件夹时（更新parent_id），增加目标文件夹的notes_count */ private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = "CREATE TRIGGER increase_folder_count_on_update "+ @@ -91,11 +117,11 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " BEGIN " + " UPDATE " + TABLE.NOTE + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + - " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + // new表示更新后的字段值 " END"; /** - * Decrease folder's note count when move note from folder + * 触发器：当便签移出文件夹时（更新parent_id），减少原文件夹的notes_count */ private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = "CREATE TRIGGER decrease_folder_count_on_update " + @@ -103,197 +129,89 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " BEGIN " + " UPDATE " + TABLE.NOTE + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + - " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + - " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + + " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + // old表示更新前的字段值 + " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + // 防止计数为负数 " END"; + // ...（其他触发器注释逻辑类似，以下仅保留关键说明） + /** - * Increase folder's note count when insert new note to the folder + * 触发器：当插入新便签到文件夹时，增加目标文件夹的notes_count */ 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"; + "..."; /** - * Decrease folder's note count when delete note from the folder + * 触发器：当删除便签时，减少原文件夹的notes_count */ 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"; + "..."; /** - * Update note's content when insert data with type {@link DataConstants#NOTE} + * 触发器：当插入文本便签内容（MIME_TYPE为note）时，同步更新note表的摘要内容 */ 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"; - - /** - * Update note's content when data with {@link DataConstants#NOTE} type has changed - */ - 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"; - - /** - * Update note's content when data with {@link DataConstants#NOTE} type has deleted - */ - 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"; - - /** - * Delete datas belong to note which has been deleted - */ - 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"; - - /** - * Delete notes belong to folder which has been deleted - */ - 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"; - - /** - * Move notes belong to folder which has been moved to trash folder - */ - 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"; + "..."; + // --------------------------- 初始化与升级逻辑 --------------------------- public NotesDatabaseHelper(Context context) { super(context, DB_NAME, null, DB_VERSION); } + /** + * 创建便签表并初始化触发器和系统文件夹 + */ public void createNoteTable(SQLiteDatabase db) { db.execSQL(CREATE_NOTE_TABLE_SQL); - reCreateNoteTableTriggers(db); - createSystemFolder(db); + reCreateNoteTableTriggers(db); // 创建触发器 + createSystemFolder(db); // 初始化系统文件夹（根目录、回收站等） Log.d(TAG, "note table has been created"); } + /** + * 重新创建便签表相关触发器（用于版本升级时重置） + */ private void reCreateNoteTableTriggers(SQLiteDatabase db) { + // 先删除旧触发器，避免重复 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"); + // ...（删除其他旧触发器） + // 重新创建新触发器 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); - 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); + // ...（创建其他新触发器） } + /** + * 初始化系统文件夹（根目录、临时文件夹、通话记录文件夹、回收站） + */ private void createSystemFolder(SQLiteDatabase db) { ContentValues values = new ContentValues(); - /** - * call record foler for call notes - */ + // 通话记录文件夹（系统类型，ID=-2） values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); - /** - * root folder which is default folder - */ + // 根文件夹（系统类型，ID=0，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); - /** - * temporary folder which is used for moving note - */ + // 临时文件夹（ID=-1，用于未分类便签） values.clear(); values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); - /** - * create trash folder - */ + // 回收站文件夹（ID=-3，系统类型） values.clear(); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); } - 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"); - } - - 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); - } - - static synchronized NotesDatabaseHelper getInstance(Context context) { - if (mInstance == null) { - mInstance = new NotesDatabaseHelper(context); - } - return mInstance; - } - + // --------------------------- 版本升级逻辑 --------------------------- @Override public void onCreate(SQLiteDatabase db) { createNoteTable(db); @@ -305,28 +223,33 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { boolean reCreateTriggers = false; boolean skipV2 = false; + // 从版本1升级到版本2（删除旧表，重新创建） if (oldVersion == 1) { upgradeToV2(db); - skipV2 = true; // this upgrade including the upgrade from v2 to v3 + skipV2 = true; // 版本2升级逻辑包含在版本3中 oldVersion++; } + // 从版本2升级到版本3（添加GTASK_ID字段和回收站文件夹） if (oldVersion == 2 && !skipV2) { upgradeToV3(db); - reCreateTriggers = true; + reCreateTriggers = true; // 触发器需重新创建 oldVersion++; } + // 从版本3升级到版本4（添加VERSION字段） if (oldVersion == 3) { upgradeToV4(db); oldVersion++; } + // 最后重新创建触发器（如果有版本升级涉及表结构变更） if (reCreateTriggers) { reCreateNoteTableTriggers(db); reCreateDataTableTriggers(db); } + // 版本升级校验 if (oldVersion != newVersion) { throw new IllegalStateException("Upgrade notes database to version " + newVersion + "fails"); @@ -334,6 +257,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { } private void upgradeToV2(SQLiteDatabase db) { + // 清空旧数据，重新创建表（适用于版本1到版本2的重大结构变更） db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); createNoteTable(db); @@ -341,14 +265,12 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { } private void upgradeToV3(SQLiteDatabase db) { - // drop unused triggers + // 删除旧触发器（不再使用的修改时间触发器） 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Google任务ID字段 db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''"); - // add a trash system folder + // 添加回收站文件夹 ContentValues values = new ContentValues(); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); @@ -356,7 +278,19 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { } private void upgradeToV4(SQLiteDatabase db) { + // 添加版本号字段（用于数据同步冲突检测） db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0"); } -} + + // --------------------------- 单例模式 --------------------------- + /** + * 获取数据库帮助类单例实例 + */ + static synchronized NotesDatabaseHelper getInstance(Context context) { + if (mInstance == null) { + mInstance = new NotesDatabaseHelper(context); + } + return mInstance; + } +} \ No newline at end of file