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合并 #3

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pz7ytcflj merged 1 commits from sjb_branch into main 3 weeks ago
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1 changed files with 90 additions and 89 deletions
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src/net/micode/notes/data/NotesDatabaseHelper.java
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@ -26,65 +26,66 @@ import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants; import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns; 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 { public class NotesDatabaseHelper extends SQLiteOpenHelper {
// 数据库名称
private static final String DB_NAME = "note.db"; private static final String DB_NAME = "note.db";
// 数据库版本号
private static final int DB_VERSION = 4; private static final int DB_VERSION = 4;
// 表名常量接口
public interface TABLE { public interface TABLE {
public static final String NOTE = "note"; public static final String NOTE = "note"; // 便签主表
public static final String DATA = "data"; // 便签数据表
public static final String DATA = "data";
} }
private static final String TAG = "NotesDatabaseHelper"; private static final String TAG = "NotesDatabaseHelper"; // 日志标签
private static NotesDatabaseHelper mInstance; // 单例实例
private static NotesDatabaseHelper mInstance;
// 创建便签表的SQL语句
private static final String CREATE_NOTE_TABLE_SQL = private static final String CREATE_NOTE_TABLE_SQL =
"CREATE TABLE " + TABLE.NOTE + "(" + "CREATE TABLE " + TABLE.NOTE + "(" +
NoteColumns.ID + " INTEGER PRIMARY KEY," + NoteColumns.ID + " INTEGER PRIMARY KEY," + // 主键ID
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 父文件夹ID
NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + // 提醒日期
NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + 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)," + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建时间
NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + // 是否有附件
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改时间
NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + // 子便签数量
NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + // 便签摘要
NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 便签类型
NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + // 小部件ID
NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + // 小部件类型
NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + // 同步ID
NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + // 本地修改标志
NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 原始父文件夹ID
NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + // Google任务ID
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + 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 = private static final String CREATE_DATA_TABLE_SQL =
"CREATE TABLE " + TABLE.DATA + "(" + "CREATE TABLE " + TABLE.DATA + "(" +
DataColumns.ID + " INTEGER PRIMARY KEY," + DataColumns.ID + " INTEGER PRIMARY KEY," + // 主键ID
DataColumns.MIME_TYPE + " TEXT NOT NULL," + DataColumns.MIME_TYPE + " TEXT NOT NULL," + // MIME类型
DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + 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)," + 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)," + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改时间
DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + // 内容
DataColumns.DATA1 + " INTEGER," + DataColumns.DATA1 + " INTEGER," + // 备用数据1
DataColumns.DATA2 + " INTEGER," + DataColumns.DATA2 + " INTEGER," + // 备用数据2
DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + // 备用数据3
DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + // 备用数据4
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + 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 = private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
"CREATE INDEX IF NOT EXISTS note_id_index ON " + "CREATE INDEX IF NOT EXISTS note_id_index ON " +
TABLE.DATA + "(" + DataColumns.NOTE_ID + ");"; TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
/** // 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）
* Increase folder's note count when move note to the folder
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_update "+ "CREATE TRIGGER increase_folder_count_on_update "+
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE + " 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 + ";" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END"; " END";
/** // 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）
* Decrease folder's note count when move note from folder
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_update " + "CREATE TRIGGER decrease_folder_count_on_update " +
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE + " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
@ -107,9 +106,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
" END"; " END";
/** // 触发器：增加文件夹的便签数量（当插入新便签到文件夹时）
* Increase folder's note count when insert new note to the folder
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER = private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_insert " + "CREATE TRIGGER increase_folder_count_on_insert " +
" AFTER INSERT ON " + TABLE.NOTE + " AFTER INSERT ON " + TABLE.NOTE +
@ -119,9 +116,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END"; " END";
/** // 触发器：减少文件夹的便签数量（当从文件夹删除便签时）
* Decrease folder's note count when delete note from the folder
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER = private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_delete " + "CREATE TRIGGER decrease_folder_count_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE + " AFTER DELETE ON " + TABLE.NOTE +
@ -132,9 +127,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" AND " + NoteColumns.NOTES_COUNT + ">0;" + " AND " + NoteColumns.NOTES_COUNT + ">0;" +
" END"; " END";
/** // 触发器：当插入NOTE类型的数据时更新便签内容
* Update note's content when insert data with type {@link DataConstants#NOTE}
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER = private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
"CREATE TRIGGER update_note_content_on_insert " + "CREATE TRIGGER update_note_content_on_insert " +
" AFTER INSERT ON " + TABLE.DATA + " AFTER INSERT ON " + TABLE.DATA +
@ -145,9 +138,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END"; " END";
/** // 触发器：当更新NOTE类型的数据时更新便签内容
* Update note's content when data with {@link DataConstants#NOTE} type has changed
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER = private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER update_note_content_on_update " + "CREATE TRIGGER update_note_content_on_update " +
" AFTER UPDATE ON " + TABLE.DATA + " AFTER UPDATE ON " + TABLE.DATA +
@ -158,9 +149,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END"; " END";
/** // 触发器：当删除NOTE类型的数据时清空便签内容
* Update note's content when data with {@link DataConstants#NOTE} type has deleted
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER = private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
"CREATE TRIGGER update_note_content_on_delete " + "CREATE TRIGGER update_note_content_on_delete " +
" AFTER delete ON " + TABLE.DATA + " AFTER delete ON " + TABLE.DATA +
@ -171,9 +160,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" + " WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
" END"; " END";
/** // 触发器：当删除便签时删除关联的数据
* Delete datas belong to note which has been deleted
*/
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER = private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
"CREATE TRIGGER delete_data_on_delete " + "CREATE TRIGGER delete_data_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE + " AFTER DELETE ON " + TABLE.NOTE +
@ -182,9 +169,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" + " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
" END"; " END";
/** // 触发器：当删除文件夹时删除其中的所有便签
* Delete notes belong to folder which has been deleted
*/
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER = private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
"CREATE TRIGGER folder_delete_notes_on_delete " + "CREATE TRIGGER folder_delete_notes_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE + " AFTER DELETE ON " + TABLE.NOTE +
@ -193,9 +178,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END"; " END";
/** // 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
* Move notes belong to folder which has been moved to trash folder
*/
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER = private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
"CREATE TRIGGER folder_move_notes_on_trash " + "CREATE TRIGGER folder_move_notes_on_trash " +
" AFTER UPDATE ON " + TABLE.NOTE + " AFTER UPDATE ON " + TABLE.NOTE +
@ -206,18 +189,22 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END"; " END";
// 构造函数
public NotesDatabaseHelper(Context context) { public NotesDatabaseHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION); super(context, DB_NAME, null, DB_VERSION);
} }
// 创建便签表
public void createNoteTable(SQLiteDatabase db) { public void createNoteTable(SQLiteDatabase db) {
db.execSQL(CREATE_NOTE_TABLE_SQL); db.execSQL(CREATE_NOTE_TABLE_SQL);
reCreateNoteTableTriggers(db); reCreateNoteTableTriggers(db); // 重新创建触发器
createSystemFolder(db); createSystemFolder(db); // 创建系统文件夹
Log.d(TAG, "note table has been created"); Log.d(TAG, "note table has been created");
} }
// 重新创建便签表的触发器
private void reCreateNoteTableTriggers(SQLiteDatabase db) { 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 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_update");
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete"); 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_delete_notes_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash"); 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_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
db.execSQL(NOTE_DECREASE_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_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
@ -235,58 +223,56 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER); db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
} }
// 创建系统文件夹
private void createSystemFolder(SQLiteDatabase db) { private void createSystemFolder(SQLiteDatabase db) {
ContentValues values = new ContentValues(); ContentValues values = new ContentValues();
/** // 通话记录文件夹
* call record foler for call notes
*/
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values);
/** // 根文件夹（默认文件夹）
* root folder which is default folder
*/
values.clear(); values.clear();
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values);
/** // 临时文件夹（用于移动便签）
* temporary folder which is used for moving note
*/
values.clear(); values.clear();
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values);
/** // 回收站文件夹
* create trash folder
*/
values.clear(); values.clear();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values);
} }
// 创建数据表
public void createDataTable(SQLiteDatabase db) { public void createDataTable(SQLiteDatabase db) {
db.execSQL(CREATE_DATA_TABLE_SQL); db.execSQL(CREATE_DATA_TABLE_SQL);
reCreateDataTableTriggers(db); reCreateDataTableTriggers(db); // 重新创建触发器
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); // 创建索引
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
private void reCreateDataTableTriggers(SQLiteDatabase db) { 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_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update"); db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete"); 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_INSERT_TRIGGER);
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER); db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER); db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
} }
// 获取单例实例
static synchronized NotesDatabaseHelper getInstance(Context context) { static synchronized NotesDatabaseHelper getInstance(Context context) {
if (mInstance == null) { if (mInstance == null) {
mInstance = new NotesDatabaseHelper(context); mInstance = new NotesDatabaseHelper(context);
@ -294,68 +280,83 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
return mInstance; return mInstance;
} }
// 数据库创建回调
@Override @Override
public void onCreate(SQLiteDatabase db) { public void onCreate(SQLiteDatabase db) {
createNoteTable(db); createNoteTable(db); // 创建便签表
createDataTable(db); createDataTable(db); // 创建数据表
} }
// 数据库升级回调
@Override @Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
boolean reCreateTriggers = false; boolean reCreateTriggers = false;
boolean skipV2 = false; boolean skipV2 = false;
// 从版本1升级到版本2
if (oldVersion == 1) { if (oldVersion == 1) {
upgradeToV2(db); 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++; oldVersion++;
} }
// 从版本2升级到版本3
if (oldVersion == 2 && !skipV2) { if (oldVersion == 2 && !skipV2) {
upgradeToV3(db); upgradeToV3(db);
reCreateTriggers = true; reCreateTriggers = true;
oldVersion++; oldVersion++;
} }
// 从版本3升级到版本4
if (oldVersion == 3) { if (oldVersion == 3) {
upgradeToV4(db); upgradeToV4(db);
oldVersion++; oldVersion++;
} }
// 如果需要，重新创建触发器
if (reCreateTriggers) { if (reCreateTriggers) {
reCreateNoteTableTriggers(db); reCreateNoteTableTriggers(db);
reCreateDataTableTriggers(db); reCreateDataTableTriggers(db);
} }
// 检查是否升级成功
if (oldVersion != newVersion) { if (oldVersion != newVersion) {
throw new IllegalStateException("Upgrade notes database to version " + newVersion throw new IllegalStateException("Upgrade notes database to version " + newVersion
+ "fails"); + "fails");
} }
} }
// 升级到版本2
private void upgradeToV2(SQLiteDatabase db) { private void upgradeToV2(SQLiteDatabase db) {
// 删除旧表
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
// 重新创建表
createNoteTable(db); createNoteTable(db);
createDataTable(db); createDataTable(db);
} }
// 升级到版本3
private void upgradeToV3(SQLiteDatabase db) { 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_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update"); 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 db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
+ " TEXT NOT NULL DEFAULT ''"); + " TEXT NOT NULL DEFAULT ''");
// add a trash system folder
// 添加回收站系统文件夹
ContentValues values = new ContentValues(); ContentValues values = new ContentValues();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values);
} }
// 升级到版本4
private void upgradeToV4(SQLiteDatabase db) { private void upgradeToV4(SQLiteDatabase db) {
// 添加版本号列
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");
} }

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