From 3e8d5a097311cc6a39f536e78646a1fa56e42a4c Mon Sep 17 00:00:00 2001 From: owo193 <3476160272@qq.com> Date: Thu, 15 May 2025 14:16:38 +0800 Subject: [PATCH] xiaomi --- .../notes/data/NotesDatabaseHelper.java | 179 +++++++++--------- 1 file changed, 90 insertions(+), 89 deletions(-) diff --git a/src/net/micode/notes/data/NotesDatabaseHelper.java b/src/net/micode/notes/data/NotesDatabaseHelper.java index ffe5d57..29b943d 100644 --- a/src/net/micode/notes/data/NotesDatabaseHelper.java +++ b/src/net/micode/notes/data/NotesDatabaseHelper.java @@ -26,65 +26,66 @@ 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，用于创建和管理小米便签的数据库 public class NotesDatabaseHelper extends SQLiteOpenHelper { + // 数据库名称 private static final String DB_NAME = "note.db"; - + // 数据库版本号 private static final int DB_VERSION = 4; + // 表名常量接口 public interface TABLE { - public static final String NOTE = "note"; - - public static final String DATA = "data"; + public static final String NOTE = "note"; // 便签主表 + public static final String DATA = "data"; // 便签数据表 } - private static final String TAG = "NotesDatabaseHelper"; - - private static NotesDatabaseHelper mInstance; + private static final String TAG = "NotesDatabaseHelper"; // 日志标签 + private static NotesDatabaseHelper mInstance; // 单例实例 + // 创建便签表的SQL语句 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 + NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + // 提醒日期 + NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + // 背景颜色ID + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建时间 + NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + // 是否有附件 + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改时间 + NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + // 子便签数量 + NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + // 便签摘要 + NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 便签类型 + 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 + NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + // 同步ID + NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + // 本地修改标志 + NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 原始父文件夹ID + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + // Google任务ID + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + // 版本号 ")"; + // 创建数据表的SQL语句 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 + DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + // 关联的便签ID + 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 + DataColumns.DATA1 + " INTEGER," + // 备用数据1 + DataColumns.DATA2 + " INTEGER," + // 备用数据2 + DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + // 备用数据3 + DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + // 备用数据4 + DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + // 备用数据5 ")"; + // 为DATA表的NOTE_ID字段创建索引 private static final String CREATE_DATA_NOTE_ID_INDEX_SQL = "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：更新文件夹的便签数量（当便签移动到文件夹时增加计数） 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 + @@ -94,9 +95,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + " END"; - /** - * Decrease folder's note count when move note from folder - */ + // 触发器：更新文件夹的便签数量（当便签从文件夹移出时减少计数） 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 + @@ -107,9 +106,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + " END"; - /** - * Increase folder's note count when insert new note to the folder - */ + // 触发器：增加文件夹的便签数量（当插入新便签到文件夹时） private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER = "CREATE TRIGGER increase_folder_count_on_insert " + " AFTER INSERT ON " + TABLE.NOTE + @@ -119,9 +116,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + " END"; - /** - * Decrease folder's note count when delete note from the folder - */ + // 触发器：减少文件夹的便签数量（当从文件夹删除便签时） private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER = "CREATE TRIGGER decrease_folder_count_on_delete " + " AFTER DELETE ON " + TABLE.NOTE + @@ -132,9 +127,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " AND " + NoteColumns.NOTES_COUNT + ">0;" + " END"; - /** - * Update note's content when insert data with type {@link DataConstants#NOTE} - */ + // 触发器：当插入NOTE类型的数据时更新便签内容 private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER = "CREATE TRIGGER update_note_content_on_insert " + " AFTER INSERT ON " + TABLE.DATA + @@ -145,9 +138,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + " END"; - /** - * Update note's content when data with {@link DataConstants#NOTE} type has changed - */ + // 触发器：当更新NOTE类型的数据时更新便签内容 private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER = "CREATE TRIGGER update_note_content_on_update " + " AFTER UPDATE ON " + TABLE.DATA + @@ -158,9 +149,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + " END"; - /** - * Update note's content when data with {@link DataConstants#NOTE} type has deleted - */ + // 触发器：当删除NOTE类型的数据时清空便签内容 private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER = "CREATE TRIGGER update_note_content_on_delete " + " AFTER delete ON " + TABLE.DATA + @@ -171,9 +160,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" + " END"; - /** - * Delete datas belong to note which has been deleted - */ + // 触发器：当删除便签时删除关联的数据 private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER = "CREATE TRIGGER delete_data_on_delete " + " AFTER DELETE ON " + TABLE.NOTE + @@ -182,9 +169,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" + " END"; - /** - * Delete notes belong to folder which has been deleted - */ + // 触发器：当删除文件夹时删除其中的所有便签 private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER = "CREATE TRIGGER folder_delete_notes_on_delete " + " AFTER DELETE ON " + TABLE.NOTE + @@ -193,9 +178,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " END"; - /** - * Move notes belong to folder which has been moved to trash folder - */ + // 触发器：当移动文件夹到回收站时，移动其中的所有便签到回收站 private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER = "CREATE TRIGGER folder_move_notes_on_trash " + " AFTER UPDATE ON " + TABLE.NOTE + @@ -206,18 +189,22 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " END"; + // 构造函数 public NotesDatabaseHelper(Context context) { super(context, DB_NAME, null, DB_VERSION); } + // 创建便签表 public void createNoteTable(SQLiteDatabase db) { db.execSQL(CREATE_NOTE_TABLE_SQL); - reCreateNoteTableTriggers(db); - createSystemFolder(db); + reCreateNoteTableTriggers(db); // 重新创建触发器 + createSystemFolder(db); // 创建系统文件夹 Log.d(TAG, "note table has been created"); } + // 重新创建便签表的触发器 private void reCreateNoteTableTriggers(SQLiteDatabase db) { + // 先删除可能存在的旧触发器 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 +213,7 @@ 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); @@ -235,58 +223,56 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER); } + // 创建系统文件夹 private void createSystemFolder(SQLiteDatabase db) { ContentValues values = new ContentValues(); - /** - * call record foler for call notes - */ + // 通话记录文件夹 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（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（用于移动便签） 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 values.clear(); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); } + // 创建数据表 public void createDataTable(SQLiteDatabase db) { db.execSQL(CREATE_DATA_TABLE_SQL); - reCreateDataTableTriggers(db); - db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); + reCreateDataTableTriggers(db); // 重新创建触发器 + db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); // 创建索引 Log.d(TAG, "data table has been created"); } + // 重新创建数据表的触发器 private void reCreateDataTableTriggers(SQLiteDatabase db) { + // 先删除可能存在的旧触发器 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); } + // 获取单例实例 static synchronized NotesDatabaseHelper getInstance(Context context) { if (mInstance == null) { mInstance = new NotesDatabaseHelper(context); @@ -294,69 +280,84 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { return mInstance; } + // 数据库创建回调 @Override public void onCreate(SQLiteDatabase db) { - createNoteTable(db); - createDataTable(db); + createNoteTable(db); // 创建便签表 + createDataTable(db); // 创建数据表 } + // 数据库升级回调 @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { boolean reCreateTriggers = false; boolean skipV2 = false; + // 从版本1升级到版本2 if (oldVersion == 1) { upgradeToV2(db); - skipV2 = true; // this upgrade including the upgrade from v2 to v3 + skipV2 = true; // 这个升级包括从v2到v3的升级 oldVersion++; } + // 从版本2升级到版本3 if (oldVersion == 2 && !skipV2) { upgradeToV3(db); reCreateTriggers = true; oldVersion++; } + // 从版本3升级到版本4 if (oldVersion == 3) { upgradeToV4(db); oldVersion++; } + // 如果需要，重新创建触发器 if (reCreateTriggers) { reCreateNoteTableTriggers(db); reCreateDataTableTriggers(db); } + // 检查是否升级成功 if (oldVersion != newVersion) { throw new IllegalStateException("Upgrade notes database to version " + newVersion + "fails"); } } + // 升级到版本2 private void upgradeToV2(SQLiteDatabase db) { + // 删除旧表 db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); + // 重新创建表 createNoteTable(db); createDataTable(db); } + // 升级到版本3 private void upgradeToV3(SQLiteDatabase db) { - // drop unused triggers + // 删除未使用的触发器 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 + + // 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); } + // 升级到版本4 private void upgradeToV4(SQLiteDatabase db) { + // 添加版本号列 db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0"); } -} +} \ No newline at end of file -- 2.34.1